bluuebunny/crossref_metadata_2025 huggingface dataset:
Ultimate Strength Analysis of Open Box Girders under Bending Moment and Lateral Pressure
Authors: Vu Van Tan , Wu Wei Guo
Published: July 2014

This paper made use of nonlinear finite element method to calculate the ultimate strength of bulk carrier model under bending moment and lateral pressure using a commercial FEA program, ABAQUS. It studies the ultimate strength bending moment of Nishihara bulk carrier model. This paper mainly analyzes the influence of the ultimate strength the bulk carrier model under bending moment and lateral pressure laying a foundation for accounting the ultimate strength of the actual ship model in next step.
Bending Strength Calculation without Axial Force in Case of Annular Section
Authors: Chen Xu , Zhou Dong Hua , Han Chun Xiu , Wang Yue Yue
Published: July 2014

For RC annular members, a new algorithm is derived to calculate bending strength without axial force, and one practical table is obtained to determine the longitudinal reinforcement areas. It is a multipurpose table, because it can be applied to any section size and any concrete strength grade below C50, only one dimensionless form of moment is need, and it provides maximum compression strain of concrete and maximum tension strain of reinforcement.
Study on the Structure Safety Appraisal of Sluice Frame Structure on the Yellow River
Authors: Sun Xiao Long , Yang Jian Cheng , Wang You Zhi , Zhang Kai Lai , Zhao Yan Bo
Published: July 2014

The safety appraisal of the sluice includes safety check on site and calculation. The safety coefficient of the yellow river sluice is high which indicates significant importance. The traditional structure safety calculation models of frame structure are two dimensional. In this passage three dimensions models of the sluice frame structure was built with finite element analysis software ETABS to analysis the ratio of reinforcement, combined with safety check on site, using shaking type table theory of decomposition reaction method. Compared with the original design, the posts can’t fulfill the requests for fortification against earthquakes. The frame structure should be reinforced.
Deformation Behavior of Corroded Steel Bar Based on Viscoelastic Theory
Authors: Guo Wei Hong , Wang Tong Ning , Tang Guo Bin
Published: July 2014

This paper shows the corrosion of steel bar from a new perspective with viscoelasticity theory. The strain of steel bar is decomposed as initial elastic strain and creep strain, and the creep strain is caused by corrosion. In order to analysis creep strain, corrosion factor and corrosion strain function were introduced to reflect the deformation behavior. Then integral constitutive relation of corroded bar was deduced according to the above assumption. As a special case of this approach, the corrosion factor of steel bar in atmospheric environment is introduced. The results indicate that the corrosion factor increase with diameter deducing, and the deformation of the steel bar possess the acceleration creep behavior during the corrosion process.
Experimental Study on Flexural Behavior of Typical Mortise-Tenon Joints
Authors: Chen Chun Chao , Qiu Hong Xing , Xu Ming Gang
Published: July 2014

The same two straight mortise-tennon joints in the base of melon-column (SJ for short) and penetrated mortise-tennon joints (PJ for short) were made with related rules. Relations of moment-rotation, length of the tenon pulled out-rotation and failure modes were got through monotonic loading test. Experimental study showed the main damage type of SJ was pulling out, while two damage types of PJ were bending damage and transverse tearing failure respectively. When under the action of bending moment, the resisting torque of SJ was synthesized by vertical load of columns, while that of PJ was mainly synthesized by local compresssive stress and friction on upper and lower surface of the tennon. In addition, the pulling size of tennons was associated with the heigth of tenon and relative rotation of beam and column.
Experimental Study on Shear of Reinforced Concrete Beams with High Strength Rebars as Stirrups under Different Shear Span Ratios
Authors: Li Peng , Zhang Xian Tang , Wang Ming Ping
Published: July 2014

To investigate the influence of shear span ratio for the shear behavior of reinforced concrete beam with HRBF500 high strength rebars as stirrups, an experiment was carried out, which included 8 simply supported beams with HRBF500 rebars as stirrups. Under concentrated loads, the crack, deflection, strain of rebars, bearing capacity and failure mode are observed under different shear span ratios. Some comparisons are made between test results and calculated outcome. It shows that the shear span ratio has very important influent on the shear behavior of reinforced concrete beam with HRBF500 high strength bars as stirrups. Formula in code for design of concrete structures can be used to calculate its shear capacity with enough safety.
Static Finite Element Analysis of Large Liquefied Natural Gas Prestressed Storage Tank
Authors: Wang Wei Ling
Published: July 2014

Finite element analysis of LNG prestressed storage tank which was under various load conditions was carried out. The calculation results show that the low temperature load and prestress force are the control load which affect the storage tank stress. Further,some recommendations on the configuration of the prestressed reinforcement have been made so as to provide the basis for the design optimization of prestressed LNG tanks.
Study on Wind Load about Rotary Reticulated Shell by the Wind Tunnel Experiment
Authors: Yuan Zi Hou , Yuan Yi Chen , Sun Wei
Published: July 2014

This paper is to study the wind load of rotary reticulated shell by experimental methods. The article conduct rigid model experiments to reticulated shell, measure wind pressure distribution on shell’top. Similar conditions is to meet production model:geometric similarity,flow similarity , Reynolds number equal. These results can be used as a reference for the new version of the wind load criteria.
Temperature Distributions of Protected Cellular Beams Heated Three Sides
Authors: Zhu Li , Wang Xu Dong , Wang Pei Jun
Published: July 2014

The fire design of structural members depends greatly on temperature distributions. This paper focuses on the temperature distributions of protected cellular beams subject to fire. Modeling in ABAQUS indicates that the fire protection makes a big difference to the temperature distributions of cellular beams. A continuous drop in temperature in the upper region of the web occurs due to heat transfer from the web to the top flange, and consequently to the ambient. Heat transfer between the web and the bottom flange also takes place resulting in non-uniform temperature distributions in the lower region of the web. Comparison with predictions from the European codes shows a good correlation between each other, but with some discrepancies.
Temperature Distributions of Protected Cellular Composite Beams Heated Three Sides
Authors: Wang Xu Dong , Zhu Li , Wang Pei Jun
Published: July 2014

The fire design of structural members depends on its temperature distributions. This paper investigates the temperature distributions of protected cellular composite beams heated three sides. Modeling in ABAQUS indicates that the fire protection and the concrete slab make a big difference to the temperature distributions of steel beams. Temperature gradient exists across the web region of the steel beam. Comparison with predictions from European design codes shows a good correlation between each other, but some discrepancies exist for the top flange.
Testing Research is about the Influence of the Diameter of the Bearing Push-Extend Reamed to the Bearing Capability of the Pile of Push-Extend Multi-Under-Reamed Pile
Authors: Qian Yong Mei , Zhai Rong Zheng , Liu Xiao Long
Published: July 2014

In this paper, through the experimental study about the stress of soil around the pile when the bearing push-extend reamed have different diameters, observed the destruction of soil around the pile. Further determined the destruction of soil form, verify the theoretical analysis results of the influence for bearing capacity of the push-extend Multi-under-reamed pile in the different diameter of the bearing push-extend reamed. It provided a reliable basis of comprehensive considering the factors influencing of the Push-extend Multi-under-reamed Pile in the actual design.
The Calculation Method for Moment-Rotation Curve of T-Beam Joints in Semi-Rigid Connections
Authors: Liu Wei , Zhang Xiong
Published: July 2014

Reference to the proposed research results and abroad specification, T-beam connection is widely used in engineering steel connection. Comparing with the finite element result, it has been verified that this method can effectively calculate the moment-rotation curve. So it can be a beneficial supplement to the steel structure design code of the T-beam connections.
The Development and Research of Special-Shape Pile
Authors: Wang Xin Quan , Zhang Shi Min , Liao Juan , Huang Ying Sheng
Published: July 2014

Throughout the history of the development of piles, they play an important role in the progress of humanity. And along with the advance of modern science and technology and social development, pile foundation has been great development. There is a rise of piles called special-shape piles in recent years, which shows strong adaptability of modern construction. Compared with traditional circular pile, emerging pile has developed rapidly, showing extraordinary to adapt to the modern trend of pile foundation construction. Some characteristics of new type of pile has been developed and put into practical use, and good results have been achieved.
The Meticulous Analysis of Skew Beam Based on the Space Skew Beam Element Method
Authors: Xu Xiang Feng , Zhang Feng , Qi Guang Zhi
Published: July 2014

When a skew bridge is analyzed, it is difficult to treat skew boundary conditions with general space beam element in single beam calculation of skew beam bridge. The stiffness of skew bridge cannot be simulated efficiently. In order to improve the accuracy of skew bridge, the stiffness matrix of the space skew beam element is derived based on the principle of minimum potential in this paper, this element is suitable for single beam of skew bridge and grillage method. A corresponding program is completed by Visual C++, the calculated results of different finite element models are compared, so the validity of the proposed model in this paper is validated. This paper can provide reference for plane and space calculation of the skew bridge design.
The Research for Moment-Rotation Curve of T-Beam Joints in Semi-Rigid Connections
Authors: Liu Wei , Zhang Xiong
Published: July 2014

Reference to the proposed research results and abroad specification, T-stub connection is widely used in engineer steel connection. The calculation of moment-rotation curve for this connection be proposed. The parameters which can connect directly reflect the moment of nodes nodes-the impact corner, By comparing the calculated results with finite element results prove that this method can be a good trend and finite element results coincide.
The Research on the Ultimate Bearing Capacity of Soil around the Push-Extend Multi-under-Reamed Pile at Sliding Failure State
Authors: Qian Yong Mei , Zhao Da Peng , Xie Xue Wen
Published: July 2014

In the paper, the existing unreasonable place of the calculation formula of the bearing capacity of single pile is put forward. Through analyzing the failure mechanism of the soil up and under the Multi-under-reamed, the method for calculating the ultimate bearing capacity of soil around the PEMUR pile can be determined by using the slide-line theory, and the calculation formula of the bearing capacity of single pile of the PEMUR pile is further revised and perfected.
Analysis and Reinforcement on the Up-Floating Accident of the Basement of a Large Commercial Complex
Authors: Yang Li Hua , Wang Heng , Han Zhi Guo
Published: July 2014

This paper introduces the failure law of the floating structures by an engineering examples of the up-floating accident. The reasons of the accident are insufficience of anti-floating anchor rod, short of the length of anchor rod and early termination of precipitation, according to the analysis about the design and the construction information. Through the new anti-floating anchor and new reinforced concrete slab, the whole anti-uplift and partial anti-uplift of underground parts of the floating structure are strengthened. The frame columns and beams with cracking damage caused by the up-floating accident are strengthened with enlarging section method and the enclosure steel method.
Analysis of Seismic Performance of the Joint of Cellular Steel Column and Steel Beam in Different Axial Compression Ratio
Authors: Xu Ya Feng , Zhai Zhang Lin , Xu Pi Yuan
Published: July 2014

This article researches seismic performance of the joint of cellular steel column and steel beam through simulation of the finite element software. With the change of axial force, we can attain the load-displacement hysteretic curves, skeleton curves under the different axial compression ratio, and then analyze their bearing capacity, ductility, energy dissipation and other mechanical properties. Results show that, the decrease of axial compression ratio is helpful to improve the bearing capacity of specimens. The joints of cellular steel column and steel beam have full hysteretic curve, good ductility and seismic performance.
Discussion about the Application of Pre-Stressed Concrete Pipe Pile
Authors: Yin Ya Jun , Wang Xi Hui , Qian Yong Mei
Published: July 2014

In this paper, based on the author of many years engineering practice, analyzes and discusses the common problem in the application of high strength static pressure concrete pipe pile. For the reasonable application of pipe pile in Changchun area provide advices and references.
Effects of Beam Material Strength on the Seismic Performance of Composite CFST Column and Steel Beam Connection
Authors: Xu Ya Feng , Chen Qian , Xu Pi Yuan , S. Aboutaha Riyad
Published: July 2014

Composite concrete filled steel tubular (CFST) column is a new type of column having high ductility and high load-bearing capacity. In this paper, the finite element analysis software ABAQUS is used to study the seismic performance of 3D joint of composite CFST column and steel beam. The hysteretic curve and skeleton curve are obtained by changing the strength grade of the steel beam; calculate the energy dissipation ratio of the joint. The results show that the higher the beam’s steel strength the higher ultimate capacity of the joint in the constant axial load. But the full degree of hysteresis curve, energy dissipation and displacement ductility of the space joint decrease.
Finite Element Analysis of Deep Elliptical Submersible Pressure Hull Subjected to a Side-On Non-Contact Underwater Explosion
Authors: Elsayed Fathallah , Tong Li Li , Qi Hui , Helal Mahmoud
Published: July 2014

Predicting the dynamic response of a floating and submerged structure subjected to underwater explosion is greatly complicated by the explosion of a high explosive, propagation of shock wave, bubble-pulse, complex fluid-structure interaction phenomena and the dynamic behavior of the floating structures. A numerical simulation has been carried out to examine the behavior of elliptical submersible pressure hull to non-contact underwater explosion (UNDEX) and take the effect of bubble-pulse. The finite element package ABAQUS was used to model the UNDEX and the fluid-structure interaction (FSI) phenomena. The pressure wave resulting from an UNDEX was assumed to be a spherical wave. Plastic strain and the time histories of the wet-surface displacement, velocity and von Mises stress are presented. The analytical results are valuable for designing underwater vehicles to resist UNDEX.
Finite Element Analysis of Recycled Concrete Filled Circular Steel Tubular Stub Columns under Compressive Loading
Authors: Li Bing , Zhang Qi , Meng Shuang
Published: July 2014

The paper achieved the nonlinear analysis of bearing capacity of recycled concrete filled steel tubular short columns by using finite element analysis software ABAQUS. In order to meet the finite element analysis the writer put forward the modified formula of recycled concrete constitutive relationship of core, and elaborate d the contact at the interface of steel tube and the core concrete and related modeling points. Finally the load-deformation curves of the finite element analysis and test results coincide well. It indicates that the modified formula of recycled concrete constitutive relationship can better meet the requirements of analyzing bearing capacity of recycled concrete filled circular steel tubular columns under compressive Loading by using ABAQUS. Through the simulation experiment, it is useful for us to obtain the ultimate reliable bearing capacity of the similar structure member.
Finite Element Analysis of Steel Frame Beam-Column Irregular Joints with a Strengthened External Diaphragm
Authors: Sui Wei Ning , Shi Qing Ze , Wang Zhan Fei , Bai Xue
Published: July 2014

Finite element analysis methods were conducted to investigate the seismic performance of panel zone at the connection of square steel column and two H-shaped beams with different heigth level by using ABAQUS. Compared with the previous test ,which verifies the correctness of finite element model. The paper sets up a total of 11 finite element analysis models, The changes of the web thickness, thickness of beam flange, diameter-thickness ratio in the finite element analysis models are studied, Which affect the beam end joint load - displacement curves and stress distribution.Studies have showed that: the beam flange thickness ratio and the beam offset ratio has insignificant influence on the load-displacement curves. The diameter to thickness ratio have sharp influence on the load-displacement curves.
Finite Element Analysis on Different Axial Compression Ratio of Composite CFST Column and Steel Beam Connection
Authors: Xu Pi Yuan , Chen Qian , Xu Ya Feng
Published: July 2014

In this paper, in order to understand fully the development of failure mechanism, bearing capacity and seismic performance of the steel H-beams and composite concrete filled steel tubular (CFST) column joints strengthened by outside strengthening ring, in the space zone the effects of changing the axial compression ratio is investigated. A 3D joint finite element model is built up by finite element software ABAQUS, the elastic-plastic finite element analysis is carried through numerical modeling process. The analysis results showed that low axial compression ratio has a little influence on the bearing capacity; with the increase of axial pressure the bearing capacity will decrease in a high axial compression ratio, moreover the failure pattern of joint changes from beam end to column end. The ductility of the specimens is decreased by raising axial compression ratio.
Influence on Seismic Performance of Joints of Cellular Steel Column and Steel Beam due to the Opening Rate
Authors: Xu Pi Yuan , Zhai Zhang Lin , Xu Ya Feng
Published: July 2014

The article researches seismic performance of joints of cellular steel column and steel beam by finite element simulation. Finite element model is established by using the finite element software reasonably. Considering about the hole position and the distance of center of hole as invariant moments, under low cyclic loading we can attain hysteretic curves and skeleton curves etc. which are compared and analyzed in different opening rate by simulated software. The results show that for a certain axial compression ratio (n=0.45) of joints of cellular steel column and beam, the reasonable opening rate can improve the seismic behavior of the joints.
Mechnical Characteristic Analysis of Separate Lock Chambers
Authors: Tao Gui Lan , Jiang Cheng , Shu Liang
Published: July 2014

This paper simulates the separate lock with shear keys or with flat joints under different design conditions using the ANSYS programme, analyze the mechanical effect of the shear keys. The variation law of the joint opening，the vertical displacement and foundation stress of lock chamber in different working condition are investigated. The research shows that the joint opening is biggest under high water-level condition, but simultaneously, the influences of shear keys on the lock chamber structures is small. The vertical displacement and foundation stress of separate lock chamber with trapezoidal shear keys or with flat joints show the similar variation law. Under overhaul condition and built up lock chamber condition, the joint opening of lock with shear keys is smaller than that of lock with flat joints. Under the same conditions, the biggest vertical displacement of the lock with shear keys is smaller than that of lock with flat joints, and the foundation stress distribution of the former is more uniform.
Nonlinear Finite Element Analysis of the Stability of Gravity Platform
Authors: Wang Xin
Published: July 2014

Gravity platform was widely used in the development of marginal oil field, but the existence of scour pit caused by the flow and wave increasing the possibility to overturn. The paper introduced the no depth contact interface element to simulate the nonlinear effect between the bucket skirt and soil, and introduced the birth-death element to simulate the increasing scour pit. The results provide guidance to prevent overturning.
Analysis of Structural Design and Construction Technology of Short-Leg Shear Wall in High-Rise Buildings
Authors: Hu Yong
Published: July 2014

Short-leg shear wall structure is a special shear wall structure for high-rise buildings. This paper includes an analysis of the integrity coefficient and seismic design strategy of the short-leg shear wall, and a research on the calculation method of this structure with several relevant proposals. The author analyzes its construction technology, the application and treatment measures of various construction technologies are proposed according to specific issues in construction practice and construction characteristics.
Seismic Performance Study on the Joint of Crisscross Concrete-Filled Steel Tube Column-Steel Beam in Different Axial Compression Ratios
Authors: Xu Ya Feng , Zhu Shao Jie , Xu Pi Yuan , S. Aboutaha Riyad
Published: July 2014

In this paper, the finite element analysis software ABAQUS is used to study the seismic performance of the joint of crisscross concrete-filled steel tube core column-steel beam tested by the pseudo static simulation under low cyclic loading. Then we can get the load-displacement curves of the joint when the axial compressive ratios are 0.2~0.9. By the data analysis can be drawn: the joint of crisscross concrete-filled steel tube core column and steel beam has good ductility and strong plastic deformation capacity, and it can absorb the seismic energy largely; within range of smaller axial compression ratios, the ultimate bearing capacity of the joint has increased with the increasing of axial compression force, however, in range of larger axial compression ratios, the ultimate bearing capacity of the joint has reduced with increasing of the axial compression force; and ductility of the beam-column joint has no obvious decline when the axial force increases.
Accident Treatment on Plinth Settlement of Monolayer Steel Factory
Authors: Liu Hua Jun , Qi Yong , Zhang Bing
Published: July 2014

Crane and part of the column section of a monolayer industrial plant has a collision caused by uneven settlement of the foundation pillar. Based on the test on column bracket elevation, a overall uplift scheme for the basis of larger settlement has been proposed:truncate the middle column and stuff steel columns the same size as the original column section in the middle of column,then weld the column section and the truncated,upper and lower column groove. Flange plate and web plate are reinforced by steel plate and angle steel.Truncated steel columns can be lifted by down chain with a simple installation gantry, meanwhile control the displacement of uplift,preventing offset.
Calculation on Plastic Internal Force of Reinforced Concrete Member under Axial Force
Authors: Wu Er Jun , Chen Xing
Published: July 2014

The design of reinforced concrete structure often used the elastic internal force as the design basis, but the nonlinear behavior of reinforced concrete structures brings about errors in calculation of statically indeterminate structure. By considering the nonlinear properties, the mechanical responses of reinforced concrete structure were investigated, on which an axial force loaded at their middle span section. In a series of analysis on internal force of the reinforced concrete member at all loading stages, through the deformation compatibility equation and the balance equation, the formulas for calculating elastic-plastic internal forces and strains were derived. Comparative examples are provided and the results show a large error between internal forces calculated by the structural mechanics method and those by the elastic-plastic method proposed in this paper, and the maximum error is about 8 times.
Finite Element Analysis on Concrete-Filled Square Steel Tube Short Columns with Inner CFRP Profiles under Axial Compression
Authors: Li Guo Chang , Zhou Bing , Pan Jiang Hua
Published: July 2014

The new composite structure concrete-filled square steel tube (CFST) column with inner CFRP profiles is proposed. A finite element model is presented to investigate the mechanical behavior of CFST short columns with internal CFRP profiles subjected to axial compression using ABAQUS based on reasonable constitutive models of materials. In a addition, the content of CFRP profiles and width thickness ratio of steel tube’ effect are considered on mechanical properties of the column. Based on the model, the whole stage of axial compression of the short columns, failure mode and the stress mechanism of the ultimate bearing capacity state are calculated and analyzed.
Finite Element Simulation on Behavior of the High-Strength Concrete Filled High-Strength Square Steel Tube Middle-Long Columns under Axial Compressive Load
Authors: Li Guo Chang , Zhu Bo Wen , Liu Yu
Published: July 2014

In this paper, using ABAQUS, 16 high-strength concrete filled high-strength square steel tube middle-long columns’ axial compression process were simulated. The load-deflection relationships were obtained and the new combination in improving the bearing capacity and plastic deformation has a great advantage. Realization of length variation slenderness ratio by changing the length of column, this paper also study the influence of slenderness ratio, the main parameters of the high-strength concrete filled high-strength square steel tube middle-long column. It is found that both bearing capacity and the plastic capacity are associated with slenderness ratio.
Research on Safety of High Formwork Supporting System of Fastener-Style Steel Pipe in Concrete Structures
Authors: Jin Guo Hui , Yu Dong Sheng
Published: July 2014

This paper analyzes the safety of high-formwork support system from material quality, computational design, structure erection to construction management system. And putting forward to specific construction safety measures combine with practical engineering. In desire to make the security of high-formwork support systems in concrete structures come true.
Seismic Performance Evaluation of Steel Frame-Steel Plate Shear Wall Using Pushover and IDA
Authors: Shao Jian Hua , Tang Bai Jie
Published: July 2014

Based on the time-history analysis principle of bidirectional equivalent tension rod of steel shear wall in this paper, the theory of Incremental Dynamic Analysis (IDA) is used to investigate the real seismic behavior of steel frame-steel plate shear wall (SPSW) system under a large number of natural earthquake waves and artificial simulated earthquake waves with the gradually increased scale of seismic intensity in order to achieve the base shear-roof displacement (V-Δ) curve under each earthquake wave action. Based on the principle of unidirectional equivalent tension rod, the pushover analysis is also used to obtain the curve of base shear and roof displacement under two different loading modes of uniform distribution and inverted triangular distribution. Through the above two different methods of seismic behavior evaluation, the achieved conclusions are as follows: The most V-Δ envelope curves obtained by IDA analysis are between V-Δ envelope curves obtained by pushover analysis under these two loading modes of inverted triangular and uniform distribution. With the increase of structural storey, the effect of high order mode on seismic behavior is more and more obvious and the deviation of calculation results derived from pushover is bigger and bigger. As a result, pushover analysis is only applied to evaluate seismic performance of structure at the middle or low storey. For the pushover, the structural bearing capacity and initial stiffness is underestimated, but the structural deformation capacity is overestimated under inverted triangular loading mode, Whereas, it is the opposite situation under the uniform distribution.
Study on Fractal Characteristics of Acoustic Emission in Circular Double-Layer Stirrup Confined Concrete
Authors: Geng Peng Fei , Sun Lin Zhu , Yang Fang , Li Wei
Published: July 2014

Vertical bearing capacity experiments were conducted with circular double-layer stirrup confined concrete columns as study objects, data acquisition was carried out using acoustic emission (AE) equipment and the AE parameters and graphs acquired during the experiments were analyzed to obtain the damage evolution of steel reinforced concrete columns under compression. The correlation between fractal dimension of AE graphs and curve was studied using the fractal theory, and the results show that the AE parameter graphs have fractal characteristics and the box dimension of each AE parameter graph constantly increases with the increase in stress, with a positive correlation exhibited between the fractal dimension and stress level. The loss variable expressed with fractal dimension was defined to establish actual equivalent stresses and the equivalent stress curves and experimental curves were compared; the results show that the fractal dimension of acoustic emission parameter graph can characterize the damage laws of the concrete member.
Effects of Braces on Progressive Collapse Resistance of Steel Frame
Authors: Dong Li Chang , Wang Lai
Published: July 2014

In order to carry on the progressive collapse analysis more properly, nonlinear-dynamic analysis method is used to analyze five-storey of steel frame structure. Four structure schemes have been established, namely frames, frames with horizontal braces, frames with vertical braces and frames with horizontal cross braces. According to analyzing with different position of failure column on the first floor, the curves of displacement-time of column failure point and axial force of failure column’s neighboring are obtained. The results indicate that horizontal braces can reduce the vertical displacement above damaged column and the axial force of the columns on the first floor evidently. The vertical displacement of horizontal cross braces is less than which of horizontal braces.
Experimental Research of Corner Joints in Steel-Framed Structures under Fire Conditions
Authors: Wang Yu , Liu Yong Jun , Qi Lin
Published: July 2014

The research involved experimental testing of simple steel connections and components (structural 8.8 bolts) at elevated temperatures. High temperature tests on structural bolts demonstrated two modes of failure at elevated temperatures: bolt breakage and thread stripping. In order to prevent the thread stripping in a connection,the manufacturing process of bolts and nuts has been investigated and the ‘over tapping’ of nut threads to accommodate the (zinc) coating layer for corrosion resistance has been indentified as a primary reason resulting in this premature failure between bolts and nuts. Experimental tests on endplate connections revealed the ductility of these connections to decrease at high temperatures, which might hinder the development of catenary actions in fire if plastic hinges are attempted to be formed within the connection zones. Component-based modelling and finite element simulation have been utilized for investigation of the performance of these connections.
Non-Linear Analysis of Rheological Effects in Slender Composite Columns
Authors: Fenollosa E. , Cabrera Ivan , Almerich-Chuliá Ana
Published: July 2014

A thorough analysis of slender columns under axial force and bending moment requires second order effects assessment. Concrete’s creep is one of the factors that increase lateral displacements of the bar in the long run. This phenomenon propitiates the instability and reduces its bearing capacity. This paper shows a procedure for assessing rheological effects based on Eurocode 2 method. This procedure will be added to structural analysis software which takes into consideration geometrical and mechanical non-linearity. As an example interaction diagrams for concrete-encased composite columns with different slenderness values are obtained. These diagrams will demonstrate that rheological effects have a greater influence as axial force eccentricity and slenderness values increase.
Study on Dynamic Calculation Method of Anti-Slide Pile
Authors: Ma Tian Zhong , Zhu Yan Peng
Published: July 2014

A dynamic calculation model of the pile supporting structure with single prestressed anchor for the slope is proposed in this paper. The motion equation of the pile-prestressed anchor is established and the analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with single prestressed anchor. The calculation model provides a new approach for earthquake analysis and seismic design of slope supported by pile supporting structure with pre-stress anchor.
Finite Element Method of Corner Joints in Steel-Framed Structures under Fire Conditions
Authors: Wang Yu , Liu Yong Jun , Ma Jun
Published: July 2014

An improved component-based model has been developed which includes nonductile(brittle) components (bolts and welds) into a connection model with a reasonable assumption of their failure displacements, based on experimental tests.This model was created for a flexible end-plate connection, using the ABAQUS finite element code, in order to investigate its resistance and ductility at ambient and elevated temperatures. In the subsequent analyses, steel beams and columns are going to be simulated as finite shell/beam elements and the connection behaviour is to be represented by the simplified models. This sub-frame model will also be used for parametric studies to investigate restrained beam behaviour under fire attacks with particular emphasis on the role of the connections.
Experimental Study on the Ductility of Beams with SIFCON Blocks
Authors: Liu Kang
Published: July 2014

This paper investigates the ductility of beams with slurry infiltrated fiber concrete (SIFCON) blocks. Three SIFCON blocks with confinement in the form of stirrups and additional perforation were tested in a beam where a SIFCON block was placed into the plastic hinge zone of the beam as a compression yielding material. Results of the tests indicated that SIFCON blocks with confinement in the form of stirrups and additional perforation can produce sufficient ductility for compression yielding system.
Influence of High Mode Effects on Ductility Reduction Factors for MDOF Shear-Type Structures
Authors: Wang Hui Ying
Published: July 2014

The influences of high mode effect on ductility reduction factors for multi-degree-of-freedom (MDOF) systems are studied by modifying ductility reduction factors for equivalent single-degree-of-freedom (SDOF) systems. Based on MDOF lumped-mass shear-type models, nonlinear dynamic time history analysis are performed to investigate the influence of ductility demand increase owing to high mode effect on ductility reduction factors. An empirical estimating model of MDOF modification factor is proposed. The results demonstrate that ductility reduction factors for MDOF systems are clearly smaller than those for SDOF systems. The modification factor is mainly affected by the fundamental period and ductility.
Research on Connection Method and Mechanical Performance of Column-Wall Subassembly without Keyway under the One-way Horizontal Load in Precast Frame-Shearwall Structure
Authors: Zhao Wei Jian , Yuan Shen Ming , Tong Jia Xin , Guo Ye Nan
Published: July 2014

For the study of column-wall connection technology of precast frame-shearwall structure system, four practical connection methods of wall-column subassembly in precast frame-shearwall structure were proposed in this paper. Based on the general finite element software ABAQUS, numerical simulations were carried out on the mechanical performance of the precast and cast-in-situ wall-column subassembly. Results showed that mechanical performance of the precast column-wall subassembly, such as carrying capacities, deformations and failure modes, was almost equal to the cast-in-situ wall-column subassembly. Feasibility of the connection method which this paper proposed is verified preliminarily. The research results can provide theoretical references for related experimental researches, engineering designs and constructions.
Wind-Induced Dynamic Analysis of Rung-Shape Long-Span Tensile Cable Membrane Structure
Authors: Liang Fei , Xian Jiahao , Wang Jian Wen
Published: July 2014

The rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was analyzed. The effects of different pre-stressing degree and membrane tensile rigidity were discussed on structure natural vibration, static wind loads response and wind-induced dynamic analysis. Dynamic wind equivalent coefficient which can be used in structural design was also preliminary analyzed.
An Experimental Evaluation of Development Length of Reinforcements Embedded in Geopolymer Concrete
Authors: Kim Jee Sang , Park Jongho
Published: July 2014

Geopolymer concrete is an emerging construction material that uses a by-product material such as fly ash to completely replace the ordinary Portland cement. This material is being studied extensively and shows promise as a greener substitute for ordinary Portland cement. This paper evaluates the bond strength and development length of reinforcements embedded in geopolymer concrete with reinforcing steel using pull-out tests. The test according to EN 10080 was carried out on 27 specimens for three kinds of geopolymer concrete of 20, 30 and 40 MPa compressive strength and 10, 16 and 35 mm diameter reinforcing bars. The tests show that the bond strengths in geopolymer concrete were decreased as the diameter of reinforcement increased as in ordinary concrete and the values were greater than those in ordinary concrete. Also, the bond-slip curves were obtained which have similar shape with those of ordinary concrete. The equation for the determination of development length based on this experiment was proposed.
Analysis of Structural and Non-Structural Problems by Coupling of Finite and Infinite Elements
Authors: Demidem Mustapha , Boutemeur Remdane , Bali Abderrahim , Benyoussef El-Hadi
Published: July 2014

The main idea of this paper is to present a smart numerical technique to solve structural and non-structural problems in which the domain of interest extends to large distance in one or more directions. The concerned typical problems may be the underground excavation (tunneling or mining operations) and some heat transfer problems (energy flow rate for construction panels). The proposed numerical technique is based on the coupling between the finite element method (M.E.F.) and the infinite element method (I.E.M.) in an attractive manner taking into consideration the advantages that both methods offer with respect to the near field and the far field (good accuracy and sensible reduction of equations to be solved). In this work, it should be noticed that the using of this numerical coupling technique, based on the infinite element ascent formulation, has introduced a more realistic and economic way to solve unbounded problems for which modeling and efficiency have been elegantly improved. The types of the iso-parametric finite elements used are respectively the eight-nodes (Q8) and the four-nodes (Q4) for the near field. However, for the far field the iso-parametric infinite elements used are the eight-nodes (Q8I) and the six-nodes (Q6I).
Failure Mechanism Analysis of Tubular X-Joint under Lateral Impact Force
Authors: Song Sheng Zhi , Wei Jian Jun
Published: July 2014

To study the failure mechanism of tubular X-joint under lateral impact force, the nonlinear finite element method is adopted to simulate theoretical analysis model of tubular X-joint. Before analysis, the precision of finite element analysis (FEA) model is verified based on experimental data firstly. On the base of analyzing mechanism for tubular X-joint under lateral impact loading, the development law of deformation and stress is clarified, and energy transform pattern and the varying rules of impact force-deformation curve is analyzed.
Buckling Analysis of Single-Layer Reticulated Shells
Authors: Wang Fan , Liu Ding Ding , Lan Xiao Yi
Published: July 2014

This paper briefly introduces methods of buckling analysis, develops a model of single-layer reticulated shell in SAP2000 and carries out buckling analysis of it, using ABAQUS. The results in this paper can be recommended for practical engineering analysis of grid structures.
Calculation and Analysis of Composite Wall Frame by Finite Element
Authors: Hou Xian Qin
Published: July 2014

The lightweight frame structure with Multi-ribbed slab is a new energy-efficient residential architecture. The Multi-ribbed composite wall of the frame structure plays an important role as the main bearing components. This paper mainly discussed the mechanical performance of composite wall. A simplified frame-plane model was built based on the theoretical analysis of the composite wall. The professional calculating program has been designed and written by FORTRAN, and the calculation and analysis of the typical model has been completed with the program. Finally, the frame-plane simplified model was further calculated and analyzed by ANSYS. The method used in this paper may open a new approach for simulating and analyzing the mechanical performance in engineering practice and the result we got may provide some theory basis for the application of Multi-ribbed slab frame structure.
Design of Concrete Voided Slab of Highway Bridge Pretensioned with CFRP Tendons
Authors: Wang Peng , Shi Di , Sun Pei Ling
Published: July 2014

The concrete voided slab pretensioned with CFRP tendons is a new type slab for bridge construction. The problems such as the anchorage, loss of prestress, prestressed tendons configuration etc. are discussed, then through the analysis of structure, the characteristics and key points of design methods are put forward. With a 20m span slab as an example, a comparative study is conducted on the concrete voided slab pretensioned with different tendons of CFRP or steel. The analysis shows that the concrete voided slab pretensioned with CFRP tendons is feasible in engineering.
Finite Element Analysis on Temperature Field of Inorganic Polymer Concrete Pouring Process
Authors: Fan Xiao Chun , You Chun Zi
Published: July 2014

Because of its remarkable advantages, inorganic polymer concrete has been paid much attention by academic and engineering field in recent years. On the basis of inorganic polymer concrete temperature-stress test, the temperature field of concrete pouring process is simulated by using the finite element software ANSYS. The related thermodynamic properties of inorganic polymer concrete are discussed. Studies have shown that the temperature-time curve of inorganic polymer concrete pouring process has the same trend with that of the normal concrete. Temperature contours show a ring-shaped distribution. When the internal temperature of specimen reaches the peak, the center temperature is 44.947 degrees Celsius and the surface is 22.216 degrees Celsius. The results have certain value to explore the early cracking of inorganic polymer concrete.
Finite Element Modelling for Lateral Behaviour of Infilled RC Frames with Openings
Authors: Kong Jing Chang , Zhang Qing Guo , Liu Chun Hui
Published: July 2014

Masonry infills are commonly used in reinforced concrete (RC) frame structures. In this paper a separate finite element modelling method is proposed and used to study the lateral behaviour of single-storey one-bay masonry infilled frames with openings under monotonic horizontal loading. The interface friction model and the surface-based cohesive model are combined to simulate masonry interface and the interface between masonry wall and RC frame. Damage plastic model of material property is adapted to capture the brittle behaviour of concrete and bricks. Appropriate experimental data available from the literature are utilized to verify the model. The comparison between the numerical analysis and test results indicates that the proposed FE modelling method can predict the masonry infill wall’s crack patterns and the lateral strength and stiffness of the structure with window or door opening successfully.
Improvement of Impact Resistance of Synthetic Macro-Fiber Reinfored Concrete
Authors: Wang Guo Chao , Wang Bo Xin
Published: July 2014

The incorporation of a small amount of steel fibers or fine polypropylene fibers in concrete can increase its impact resistance. But steel fiber has the problems of corrosion, high cost and high mess. The effect of fine polypropylene fibers in inhibiting the impact crack is not effective. The research was taken to measure the properties of fresh concrete mixture of Synthetic Macro-fiber reinforced concrete. And investigated the influence of fiber length and volume fraction on the impact resistance of Synthetic Macro-fiber reinforced concrete. The results showed that these fibers could obviously improve the impact resistance of concrete. There was a best Synthetic Macro-fiber volume fraction. The length of the Synthetic Macro-fiber had a certain influence on the impact resistance of concrete.
Numerical Analysis of the Influence of the Padding-Plate on the Extended End-Plate Connection
Authors: Zhang Shao Qin , Wu Lei
Published: July 2014

In the present paper, we investigate the effect of a padding-plate on the behavior of extended end-plate semi-rigid connections. The numerical simulations were carried out for a standard extended end-plate connection joint without padding-plate and two connection joints with 4mm and 6mm thick padding-plates. The existing experimental results verified the validity of the numerical model. The numerical results have shown that a thin padding-plate will more or less decline the carrying load capacity of the connection joint but greatly improve the connect ductility. Filling a thin padding-plate in the end-plate connection is feasible and brings the forewarning function.
Optimization Design and Elastic Analysis on Shell Type Foundation for Wind Turbo-Generator
Authors: Yan Shi , Wang Hui , Yan Han , Deng Dequan
Published: July 2014

On account of the Wind Turbine Foundation Design Rules of China (trial implementation), the grid method is used to form an optimization design for the shell type foundation of the wind turbo-generator, using concrete dosage as the objective function. The constraint condition of the optimization meets the bearing capacity of the foundation and the compressive stress at the edge of foundation is greater than or equal to zero, reaching optimal relation between the central non-contact area and the contact area. Meanwhile, the finite element analysis on the shell type foundation of a wind turbo-generator is numerically performed in this paper by using ANSYS, to verify the feasibility of optimization scheme. The results show that this optimization scheme which can reduce the cost of wind power engineering project satisfies the requirement of design rules, saving the consumption of the concrete, and it has obvious economic benefits.