bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis on Structural Problems in Building Decoration
Authors: Zhao Xue Feng , Wang Qian
Published: July 2014

Aimed at the safety and serviceability issues caused by building decoration, following respects such as members of building decoration, connections between decoration members and main structure, and decoration influences on main structure have been discussed in this paper. Some suggestions and approaches, which can solve the structural problems of building decoration, have been suggested.
Effects of Shape Parameters on Deformation Characteristics of Carrier Pile
Authors: Li Hong , Ding Hong Xia , Han Shang Yu
Published: July 2014

There are many uncertainty factors which can influence the carrier pile design and construction, some of them can lead the deformation characteristic of carrier pile more complex, especially the carrier pile shape parameter. Based on the on-site testing results and the finite element simulation conclusion, the paper studied the effects of shape parameter on deformation characteristics of the carrier pile from the aspect of bottom head size, pile diameter size, gravel soil zone size, etc. The research found that increase the size of the bottom head and the size gravel soil zone can reduce the amount of deformation to a certain extent; the effect of pile diameter size increase on reducing the deformation is not obvious.
Restriction Effect of Structural Steel to Ultra High Strength Concrete in the Joint Core Area
Authors: Yan Chang Wang , Yang Yong , Zhu Jin Cai , Zhang Ju , Liu Shu Guang
Published: July 2014

In this paper, ANSYS finite element analysis software is used to research the restriction effect of steel skeleton to the joint core regions of ultra high strength concrete. The position of concrete crack is given and the crack development trend is explained. The study found the maximum stress position appears at the beam-column joints, and reaches the maximum in the web of “I” shape structural steel.
Study on the Wind-Induced Control of Tensile Membrane Structure
Authors: Zhao Guo , Zhu Hai Hua
Published: July 2014

For the membrane structure, wind is the main control load which causes its failure dramatically. In this paper the discretized triangle elements of membrane structure is presented to analyze the wind vibration by using software ANSYS. According to the wind response, the control model based on shape memory alloy spring is put forward to diminish the wind effect on the sensibility of structure. The results indicated that the proposed model is feasible.
Thermal Buckling Analysis of Cyclic Symmetry Mounting Structure
Authors: Ma Yong Bin , He Tian Hu , Gu Bing Dong
Published: July 2014

Buckling analysis is a technique used to determine buckling load and buckled mode shape. Buckling load is the critical load at which a structure becomes unstable while buckled mode shape is the characteristic shape associated with a structure's buckled response. In this paper, the elastic thermal buckling of a heated cyclic symmetry structure is carried out by means of finite element method. The buckling cyclic symmetry analysis is focused on a ring-strut-ring structure which is extensively used as a basic element in rotating machines. The linear eigenvalue buckling analysis is adopted to determine the buckling response with the temperature change of the structure.
Wind Load Analysis of Large Temporary Stand with Variable Upwind Structure
Authors: He Lin , Zou Xiao Xu , Xin Da Bo
Published: July 2014

Shadowed by temporary exhibition cloth and other non-structural enclosure structures, the wind loading area of temporary stand increase dramatically, thus, temporary stand is easily to be overturned by a wild storm. The surface wind pressure of temporary stand accompanied with cover is presented in this paper by CFD numerical method. The method to identify the wind load on the surface of space truss temporary stand is also proposed with the identified pressure coefficient. The method proposed in this paper is of great use to improve the security of space truss temporary stand.
A Joint of Ceramic Granite Mount by Threaded Anchor Studs in a Suspended Ventilated Facade
Authors: Tusnina Valentina , Emelyanov Alexey , Tusnina Olga
Published: July 2014

Suspended ventilated façades are the most common types of finishing and heat insulation of existing buildings and construction projects. There is a great variety of cladding materials employed for suspended ventilated façades, the most popular being ceramic granite. Ceramic granite cladding became widely used because it helps implement in-demand architectural solutions and simplify panel mounting. The article describes a new design solution for suspended ventilated façades, developed by the authors.
Analysis on Creep Characteristics of PC and RC Cylinders with Different Loading Ages
Authors: Cao Guo Hui , Chen Yong Ming , Hu Jia Xing
Published: July 2014

Through a long time test for creep of 9 PC (plain concrete) and RC cylinders, obtained the long-term creep rule of PC and RC cylinders, the results show that the different loading ages of PC have a greater influence on the creep coefficient, the larger loading age of concrete cylinders, the smaller of concrete creep coefficient. The experiment indicates that the measured creep rule of creep coefficient is basically the same under different loading ages with the same reinforcement ratio of concrete cylinders, the loading age have smaller influence on long-term creep of reinforced concrete cylinders. Based on the measured long-term rule of concrete creep, using the least square method to nonlinear fitting of experimental data, obtained the final value of creep coefficient of the PC under different loading ages, compared the applicability of loading age correction coefficient in the China Institute of building model and CEB-FIP (1990) model for low intensity concrete (≤C40), the results show that the predicted results of loading age correction coefficient in the China Institute of building model are agree well with the measured values, and calculated values of loading age correction coefficient in CEB-FIP (1990) model is large, for low strong concrete (≤C40), the prediction values of loading age correction coefficient in the China Institute of building model should be adopted to linear interpolation.
Characteristic Analysis of Prestressed Concrete Frame Joints with Spread-Ended Beams
Authors: Liu Qing Wen , Wu Fu Qiang
Published: July 2014

Three joints of prestressed concrete frame are studied under low frequency reversed loading. The failure and cracks feature, damage characteristics and mechanical properties under seismic loads are comparatively analysed between joints with spread-ended beams and conventional joints. Studies show that the layout of prestressing tendons and joints with spread-ended beams have little influence on the bearing capacity and ductility. Prestressing tendons through the joint core region can improve the shear strength of joints, but tendons through the joint outer region can not. We need to only consider the influence on the area of prestressing tendons through joint core region when calculating the shear strength of joints.
Contrast Analysis about the Result of Static Load Test and High Strain Testing for the Bearing Capacity of Screw Pile Foundation
Authors: Wu Qi Hong , Xu Qing , Wan Shi Ming
Published: July 2014

Firstly, the technology of screw pile is introduced briefly. It has high body quality, high bearing capacity and wide application prospect. Then, based on engineering examples, the results of static load test and high strain testing for the bearing capacity of SCREW PILE foundation are analyzed contrastively. The bearing capacity value tested by high strain dynamic testing is higher than the static loading test’s with 13%~21%, which should be attached importance in the check and accept and application of the screwed pile. The analysis and sum up of testing results should be considered to the design and application of screwed pile, providing some reference to the quality judge and bearing capacity confirming is another purpose in the paper.
Contrastive Research on the Influence of Eccentricity for Autoclaved Fly Ash Solid and Perforated Brick Masonry
Authors: Xu Chun Yi , Xu Chun Lei , Yan Lei
Published: July 2014

For studying the influence of eccentricity e on autoclaved fly ash solid and perforated brick masonry. Adopted method is that eccentric compression tests were conducted on 24 autoclaved fly ash solid brick masonry samples and 24 autoclaved fly ash perforated brick masonry samples. The damage patterns and test results are comparative analyzed. The experimental results indicate that the strain distribution in section accord with plane section assumption and the eccentric compressive capacity decreases proportionally as e increases. In conclusion, The limit value of eccentricity e are given.
Design of a Suspended Ventilated Facade with Composite Facing
Authors: Tusnina Valentina , Emelyanov Denis , Tusnina Olga
Published: July 2014

A suspended ventilated façade is the most efficient solution to insulate and improve aesthetics of both a refurbished and a newly built building. Today, a wide variety of rainscreen cladding systems exist, offering different bearing structures, cladding subframes and cladding materials. Composite cladding is the most widely used.
Dynamic Stability Analysis of Functionally Graded Plates Subjected to Complex Loads
Authors: Yang Sheng Fei , Chen Hao , Ran Chun
Published: July 2014

The paper investigates the dynamic stability of thick functionally graded plates subjected to aero-thermo-mechanical loads, using the moving least squares differential quadrature method. Temperature field is assumed to be a uniform distribution over the plate plane, and varied in the thickness direction only. Material properties are assumed to be temperature dependent and graded in the thickness direction in the simple power law manner. The equilibrium equations governing the dynamic stability of the plate are derived by the Hamilton’s principle, then these equations are discretized by the moving least squares differential quadrature method. The boundaries of the instability region are obtained using the principle of Bolotin’s method and are conveniently represented in the non-dimensional excitation frequency to load amplitude plane. The influence of various factors such as gradient index, temperature, mechanical and aerodynamic loads, thickness and aspect ratios, as well as the boundary conditions on the dynamic instability region are carefully studied.
Experimental Study of Bending Properties of CFRP Bars Concrete Beam and Crack Analysis
Authors: Yao Xue Qun , Xu Xin Sheng
Published: July 2014

A test of the flexural behavior of concrete beam strengthened with sand-coated screwed CFRP bars was carried out to analyze the bending performance and cracking development process under staged loading, and different stage of crack distribution was plotted. Based on the test results, this paper discussed the crack mechanism and cracking feature of CFRP bars concrete beam under the load, and influencing factors of crack width and crack spacing were analyzed. Finally, calculation method of crack width was presented.
Failure Modes-Based Searching and Optimizing of Steel Reinforced Concrete Frame Structures
Authors: Zhu Yan Fang , Xiong Bing , Li Zhi Qiang
Published: July 2014

Taking the optimization of steel reinforced concrete frame structure as background, the searching and optimizing of structural were taken as optimization objectives by introducing failure modes. Incremental dynamic analysis (IDA) was used to search the seismic wave, which had important significance of the structure, thus, the failure modes under the seismic waves could be obtained. And three optimization methods were proposed. Finally, an example was analyzed to verify the rationality of the proposed optimization thought and method.
Finite Element Analysis of Concrete-Filled Rectangular Tubular Frame
Authors: Li Xi Le , Niu Li Hua
Published: July 2014

Based on the model experiment on seismic behavior of a 1-span, 2-story concrete-filled rectangular steel tubal (CFRST) frame under lateral cyclic loads, a 3-D nonlinear finite element model of concrete-filled rectangular steel tubular frame is proposed in the paper. Compared with the experimental hysteresis curve, the computational results are found to be accurate, which shows that this model proposed in the paper can be applied in structure analysis of concrete-filled rectangular tubular frames. So the model was used in the finite element analysis of concrete-filled rectangular frame with different axial load level. Compared the computational displacement envelop curves, it concludes that the ductility and bearing capacity of CFRST frames reduces with the increasing axial load level.
Force Behavior of Parallel Double Coupling Beams with Different Width
Authors: Li Ming , Chen Ji Guang , Zhao Wei Jian , Wang Li Guo
Published: July 2014

The force behavior of parallel double coupling beams (PDCB) with different width is analyzed, based on which the feasibility of this kind of beams is discussed. The loading process of the PDCB is simulated by using finite element software ABAQUS. By analyzing the hysteretic loops, skeleton curves, energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient,the bearing capacity and seismic performance of the PDCB is studied. Through simulation, it shows that the hysteretic loops is plump, and the energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient of this double beams is high. It can be concluded that the PDCB has good force behavior, and the beams of PDCB can work in coordination.
Longitudinal Stress Analysis of Local Compression on the Center of Plain Concrete Column
Authors: Wang Yan
Published: July 2014

Taking local compression on the center of plain concrete square column as an example, by using finite element analysis found that longitudinal stressdistribution and size of local compression on the center of plain concrete square column related to local compression acting position and local compression area ratio.
Influencing Factors Analysis on Comfort of New-Type Precast Assembly Diaphragm
Authors: Sun Chong Fang , Liang Shu Ting , Zhu Xiao Jun
Published: July 2014

The paper selected natural frequency and peak acceleration as comfort evaluation criteria. The author tested the new floor comfort under the human-induced loads. The author analyzed new floor comfort by selecting the worst possible scenarioes. The result indicates that the new floor satisfies the comfort requirement. The comparison of test value, theoretical value and finite element value of natural frequency proved that the finite element simulation was reasonable. The author analyzed comfort influencing factors of 7m×7m floor with the same simulation method and proposed a design proposal.
Management Practice for Steel Structure Work of the Wide Span Aerial Corridor in Tobacco Construction Project
Authors: Shan Mei Di
Published: July 2014

The author in this article conducts discussion on the square steel structure construction management of owner from the engineering management scheme to management in construction preparation stage, management of material procurement and inspection, steel structure assembling and connection, steel structure hoisting and other steps by combining with practical experience in the wide span aerial corridor steel structure work of "the 11th five year plan" technological transformation project on relocation of China Tobacco Hangzhou Cigaret Factory, which can be used for reference by craft brothers
Node Additional Bending Moment's Influence on Plane K Shape Steel Tube Tubular Joint Ultimate Bearing Capacity
Authors: Liao Xian , Yong Jun , Wang Zhong Qing
Published: July 2014

The study of the existing data and steel structure design specification on node ultimate bearing capacity is limited to simply analyze its axial bearing capacity, but the study on the ultimate bearing capacity of the additional bending moment with nodes is very deficient. This article first briefly analyzed the size of the steel tube 's influence on the node additional bending moment from the aspects of node rigidity, and showed that basis and necessity of considering node additional bending moment in steel tube structure ,and then used three-dimensional four nodes elastic-plastic shell unit shell 181 and ideal elastic-plastic material to establish finite element model of K shape round steel tube tubular joint in the ANSYS finite element program, under the consideration of the geometric nonlinearity and material nonlinearity, respectively got the ultimate bearing capacity of K shape round steel tube tubular joint under the action of additional bending moment of different nodes ,analyzed the changes of mechanical property of the nodes after bearing of the additional bending moment, and showed that additional bending moment's influence rule on K shape round steel tube tubular joint ultimate bearing capacity.
A New Kind of Modular Assembly Steel Structure System
Authors: Zhang Zai Hua , Shu Xing Ping , He Ran
Published: July 2014

As a new type of structure system suitable for the realization of building industrialization, assembly structure system is a trend in the development of steel structure engineering. In this paper, a kind of assembly truss beam steel frame system is proposed. The composition of system, the technology characteristic of components and connections are analyzed in detail. Meanwhile some problems need to be solved are also put forward.
Numerical Simulation on the Mechanical Performance of the Wind Generator Latticed Concrete-Filled Steel Tubular Tower
Authors: Li Bin , Zhang Qun Hui , Gao Chun Yan
Published: July 2014

Nonlinear finite element parameters analysis on the lattice type steel pipe concrete wind turbine tower, it shows the entire process of load bearing, failure mode and ultimate bearing capacity, researches on the influence law of aspect ratio, form of tower webs, tower diameter to thickness ratio and web member stiffness to tower column stiffness ratio on the ultimate bearing capacity and tower failure mode. The finite element analysis results shows that the tower aspect ratio λ, the diameter-thickness ratio γ of tower columns and the increase of stiffness ratio β between web members and tower columns has great influence on ultimate bearing capacity and failure mode, while the form of webs has small influence on that. with the increase of tower aspect ratio λ, the decrease of diameter-thickness ratio γ of tower columns and the increase of stiffness ratio β between web members and tower columns, the ultimate bearing capacity of this kind of latticed towers increase, the failure mode changed from Web local buckling to The combined damage of Web local buckling and the tension tower yield. This paper suggests that in the design of wind turbulent generator tower, the tower aspect ratio λ should be best controlled at 1/9, the bottom layers of this kind of tower should best use the re-divided web members, and other web member forms used on above layers, the diameter-thickness ratio γ of tower column should be taken less than 30, and the stiffness ratio β between webs and columns should be controlled less than 0.05 in order to avoid damage occurring on the tower columns earlier than the webs. The results can provide evidence for the engineering design.
Numerical Study of Damage Model for Reinforced Concrete Beam under Complex Boundary Condition Subjected to Air Blast Load
Authors: Li Dan , Li Jiang Tao , Tao Jun Lin
Published: July 2014

Explicit FEM model ANSYS-DYNA is applied to simulate dynamic response and damage morphology of RC beam under blast loading. The dynamic response and damage morphology of reinforced concrete beam is analyzed under the different burst points, different explosive locations with the same proportion distance. The results show that: Under the same blast loading, the extent of damage of RC beam under complex boundary was lighter than the simply supported beam because of the stiffness contribution of slab and column. Acceleration at the half span point of the beam was 1/3 of simply supported beam, and the explosion shock attenuation was obvious.
Numerical Study of Damage Model for Reinforced Concrete Slab under Complex Boundary Condition Subjected to Air Blast Load
Authors: Li Dan , Yang Shuang Bin , Tao Jun Lin
Published: July 2014

This study applies the nonlinear finite element analysis software LS-DYNA to conduct a numerical simulation of damage mode of reinforced concrete slab under complex boundary condition subjected to air blast load. The factors affecting damage model of reinforced concrete slab, standoff distance and explosives location, were analyzed. The results show that: With the increase of the standoff distance, the failure mode of RC slab gradually changes from localized punching failure to shear failure at the support. With the location for explosive changing from the center of RC slab to the beam plate combination, the failure mode of RC slabs gradually changes from localized punching failure to bending-shear failure under close-in blast loading.
Pile Foundation Antifreezing Measures Research in Seasonal Frozen Soil Region
Authors: Song Ji Qiang
Published: July 2014

Canal bridge and aqueduct main foundation types include well column, pier, bored piles, bent pile etc. Most of these foundations are in low-lying conduit. The water content of foundation soil is very rich. Especially pile foundation in the drain, due to the high underground water level, pile foundation around soil is in a state full of water. So such type of foundation freeze injury phenomenons are very serious. In order to solve such freeze injury problems, some antifreezing measures are adopted.
Preliminary Analysis of Concrete Filled Steel Tube Reinforced Concrete Columns under Axial Compression after Exposure to Fire
Authors: Yu Wan Qing , Ren Qing Xin , Jia Lian Guang
Published: July 2014

In this paper, a further research has been carried on mechanical properties of concrete filled steel tube reinforced concrete columns after exposure to fire. A finite element analysis (FEA) model for concrete filled steel tube reinforced concrete columns after exposure to fire under axial compression is developed by ABAQUS. The temperature of cross-section element after exposure to fire has been obtained. The FEA model of temperature field is then used to investigate the mechanism of such composite columns further. Influences of parameters on Load-bearing Capacity such as fire duration time and steel ratio were analyzed. The work in this paper provides a basis for further theoretical study on concrete filled steel tube reinforced concrete columns after exposure to fire.
Progressive Collapse Analysis of CFST Frame with Semi-Rigid Connection
Authors: Ma Yang , Wang Lai
Published: July 2014

A finite element method was developed to investigate the semi-rigid connection mechanical behaviors in the process of CFST structures progressive collapse, and different semi-rigid connection joint stiffness were taken into consideration and compared to rigid connection. Nonlinear static and dynamic analysis were carried out with alternate path method. The numerical result shows that the increase of joint stiffness would evidently enhance the structural progressive collapse resistance performance, and CFST structures have excellent characteristic to prevent progressive collapse, the great deformation capacity and energy dissipation ability of semi-rigid connections are advantageous to progressive collapse resistance.
Research and Application on the Movable Protective Frame Scaffolding in the Overpass Demolition Work
Authors: Jin Xin , Li Da Hua , Wang An Hui
Published: July 2014

This essay introduces a construction case of demolishing the scrapped concrete overpass over the existing railway using the mobile protective scaffolding during the construction of an overpass reform project. When the overpass demolishing project is staging into the phase of right over the railway, moving the mobile protective scaffolding to the appropriate position guarantees an easy way for the demolishing of the scrapped overpass above as well as a safe journey for the railway. After the demolishing project, the scaffolding can be removed and dismantled. The stability of the mobile protective scaffolding structure and the design of the member response is discussed in this essay, meanwhile the controlling key points of the scaffolding during the construction is also sketched.
Research Progress on Wind-Resistant and Seismic Performance of Glass Curtain Wall Supported by Plane Cable Net
Authors: Li Ming , Wang Yuan Qing , Tao Wei , Wang Bin , Yu Qing Xian , Wu Li Li , Shan Ren Liang
Published: July 2014

Glass curtain wall supported by plane cable net (PCNCW) is very popular in civil engineering for its advantages of beautiful appearance and good permeability etc. Because plane cable net (PCN) has the obvious geometrical nonlinear character and its dynamic response is affected by the main structure it attached to, it has to be considered particularly in wind-resistant and seismic design. In recent years, many research results have been achieved on wind-resistant and seismic performance of PCNCW, including the study on how to calculate the equivalent static wind and seismic load, how the factors influence the wind-resistant force behavior, discussion on seismic fortification criterion, and how it is influenced by the main structure under wind and seismic load. These results are overviewed and the problems needed to be further studied in the future is prospected.
Analysis of the Member Buckling Influence to the Stability of Single-Layer Lattice Dome
Authors: Ma Teng Fei , Wang Jiang , Zhou Hui , Wang Zhen Wu , Mo Zong Yun , Zhang You Heng
Published: July 2014

Stability analysis is a key proplem for single layer lattice dome structures. single layer lattice dome structures before the overall instability of member instability may exist, but in the current single layer lattice dome structures stability analysis considering the influence of single layer lattice dome structures node defects only without considering the influence of the member buckling.Considering the initial geometric imperfection of single layer lattice dome structures in this paper, on the basis of initial defects of member with initial bending simulation, and the single layer lattice dome structures is different to weaken the position of member and make the member buckling before single layer lattice dome structures overall instability, systematic analysis of the member buckling effect on the overall stability of the single layer lattice dome structures.
Single Beam Load Test of Continuous Beam
Authors: Yang Ya Xun , Fan Wei Ya
Published: July 2014

GengYuHe bridge was a prestressed concrete continuous box girder bridge,based on the static load test of single beam bridges compared with theoretical calculation value,check whether the actual control section stress of the bridge are in conformity with the design requirements,and give advice.
Study on Seismic Behavior of Joint with Exterior Diaphragms between Concrete-Filled Square Steel Tubular Column and H-Type Steel Beam
Authors: Li Nan
Published: July 2014

Based on the experiments of joint with exterior diaphragms between concrete-filled square steel tubular column and H-type steel beam under cyclic loading, with appropriate material stress-strain relations and failure criteria, the mechanical properties of this type of joint were researched by using ANSYS,finite element analyses were conducted under cyclic loading, the hysteretic and framework curves of this type joint between test and theoretical were researched. The study results showed that all specimens have good ductility and energy dissipation capacity. The story angle drift ductility ratios areμ=3.07~3.66,the elastic and elastic-plastic story angle drift are Φy=0.0041~0.0047 and Φu=0.0124~0.0172,and the equivalent viscous damping coefficients are he=0.26~0.35,which meet the needs of the current code for seismic design of building.
Study on Wind Load Characteristics of a Super Tall Building Based on Numerical Simulation
Authors: Zhi Lun Hai , Jiang Shu Ya , Lu Chun Ling
Published: July 2014

This paper present some selected numerical results of a typical super-tall building based on a new Large Eddy Simulation scheme. The spatial correlation of local wind forces were presented and discussed in detail. The probabilistic characteristics of fluctuating wind loads were evaluated. Furthermore, the along-wind and across-wind spectral characteristics were studied and compared with the von Karman spectrum. The output of this study is expected to be of considerable interest and practical use to professionals and researchers involved in the design of super-tall buildings.
The Best Position to Determine the Hinge in the Cantilever Bridge
Authors: Liu Chun Lei , Dai Su Juan
Published: July 2014

The simple-supported beam bridge is a common structure form widely used in small and medium span bridges. When the span is longer, the maximum bending moment is accordingly bigger. The maximum positive and negative bending moment numerical of beam decreases obviously because of cantilever bridge with cantilever beams to reduce the amount of materials. This article analyzes the current commonly used cantilever bridge with large span. The two-span cantilever bridge is analyzed under various loads about the internal force according to the condition of the absolute value of the maximum positive and negative bending moment being equal. It carries on the contrast and analysis about simple-supported beam bridges and obtains the best location of the hinge in the cantilever bridge. Moreover, it provides some reference for the optimum design of similar bridges and projects.
The Connection Form of the Beam and Column in Prefabricated Concrete Structure
Authors: Li Ming , Zhang Hai Yang , Zhao Wei Jian , Wen Yu Ting
Published: July 2014

The prefabricated construction is widely used because of it has short construction period and can be produced automatic. It has become one of the research focuses of scholars domestic and overseas that how to connect the prefabricate components in the structure to ensure the stability of the whole structure and mechanical behavior. The connection forms of beam and column are overviewed, including the dapped-end connection, the corbel connection, the weld connection, the cast-in-situ monolithic connection, the ductile rod connection, and the pre-stressed fabricated connection. Finally, the problems needed to be further study in the future are discussed.
Analysis on the Seismic Performance of RC Frame Beam-Column Joints Strengthened by Sprayed FRP
Authors: Yang Zhao , Wu Cai
Published: July 2014

The seismic performance of RC frame beam-column joints was analyzed by using ANSYS in the paper. Firstly, reasonable finite element models were established by comparing the result of numerical simulation to experiment. Thus the seismic performance of concrete frame joints strengthened by Sprayed FRP was studied, and influence on the seismic performance by different thickness, length of Sprayed FRP, and different axial pressure ratio of column were analyzed in the paper too. Studies showed that reinforcing the concrete frame joints with Sprayed FRP is effective.
ANSYS-Based Study in the New Composite Beam for Effective Flange Width
Authors: Lv Meng Zhou , Guo Han Chen , Tian Feng
Published: July 2014

Effective flange width’s value of U-section steel-encased concrete composite beam was studied by ANSYS. Based on the static equivalent principle, the general rules of effective flange width changed with load are summarized by finite element analysis and considering the effect of 4 factors: width-span ratio, loading form, concrete thickness, and material strength including concrete strength and steel strength. The analysis results show that wide-span ratio and load form has a greater impact on the effective flange width; concrete thickness and material strength’s effects can be negligible.
Research of the Influence of Snow Load Distribution Factor on Mechanical Performance of Portal Frame
Authors: Liu Yan , Guo Li Juan , Wang Hui Ling , Wang Fei
Published: July 2014

The dissertation studies the force and deformation features of the portal frame structure under the snow load and load combination. The double cross gable portal frame model was established by 3d3s software in the paper, and analyzed under snow loading according to the regulations of China, Europe and the United States respectively. And some suggestions were put forward on the design of light-weight steel structure in China according to the comparison and analysis.
Study on the Structural Dynamic Characteristics of Sand Washing Tower Based on ANSYS
Authors: Zhao Kun , Zhu Wei Hua , Zhu Feng , Huang Chun Lin , Hua Xia
Published: July 2014

In this paper, we depart from the basic vibration equation deduced from Vibro sand tower structure recurrence formula. Using ANSYS finite element software to simulate the red sand of the top ten tower structural vibration modal. Of which the first two modal solutions in accordance with the conventional prismatic cantilever closer to theoretical calculations, the results of the finite element solution proved authentic, we provide a theoretical basis for the use of finite element methods for solving the structural problems of sand washing tower.
Study the Structure of the Vibration Characteristics of Sand Washing Water Tower Based on ANSYS
Authors: Huang Chun Lin , Zhu Wei Hua , Zhu Feng , Zhao Kun , Yin Dong Lei
Published: July 2014

Tunnel project plays an important role in many water conservancy and hydropower projects ,and a large number of water conservancy construction around the world in recent years promoting the rapid development of tunnel engineering theory and engineering technology. This paper intends to use the theory of hydrodynamic pressure Westgaard.HM hedge sand tower structure theory for simple analysis through water structure and anhydrous structural dynamic analysis and comparison to check their stress and strain and displacement of vibration in the water.
The Finite Elements for Design of Frame of Thin-Walled Beams
Authors: Lalin Vladimir , Rybakov Vladimir , Sergey Alexander
Published: July 2014

Recent years there have been observed a wide application of a metalware in industrial and civil engineering. Special place in the building industry is belonged to light steel thin-walled constructions having a lot of technological advantages. In the article the first development cycle of a numerical method creating is considered – creating of the stiffness matrixes of thin-walled finite elements of various types using the semisheared theory (by V.I.Slivker) – depending on a way of approximation of functions of deformations (torsion and warping): 1. Linear approximation of torsional functions with a 2-central finite element having 4 transitions; 2. Quadratic approximation of torsional functions and linear approximation of warping function with a 3-central finite element having 5 transitions; 3. Cubical approximation of functions of torsional and warping functions with a 3-central finite element having 6 transitions. Thus deformation functions (torsional angle and warping) are approximated as mutually independent functions.
The Influence of Slab on Yield Mechanism of RC Frame Structure
Authors: Lv Meng Zhou , Pan Tian Peng , Wu Xiao Bo
Published: July 2014

"Strong column weak beam" form of frame structure is widely considered to be a reasonable framework structure yield mechanism in the seismic damage. The current structure design is mostly on the basis of that yield mechanism for structural seismic design. Generally the structural engineers ignore the bearing capacity contribution of frame beams that comes from the slab in the seismic design. The structure engineers considered the slab as a rigid component and simply calculate the slab stiffness by magnification factor method, which ignores the core of the problem. This paper analyzes mainly the influence of the destruction of slab form frame structure , studying further how slab affect the yield mechanism of frame structure, and explores the destruction form of difference between two models after analyzing two structure models by the method of Push – over. It shows that the existence of slab make the yield mechanism of RC frame structures different from the design.
The Research of Box Beam Warping Displacement Function
Authors: Yue Yu Ping , Cui Rong Zheng
Published: July 2014

Based on the principle of minimum potential energy, choosing warping displacement function of parabolic displacement mode, using energy variational method to deduce Box beam shear lag effect analysis of differential equation to obtain shear lag warping stress. Through the calculation of simply supported box girder model and the analyse of the stress of Wide cantilever plate, box girder roof and box girder floor Assume a new warping displacement function. Through the analysis of measured results proved the rationality of this article assumes and research value.
Numerical Study on the Static Response of Grouting-Sleeve Reinforcement-Connection Component with Different Sleeve-Rib Space
Authors: Gu Fan , Zhang Peng , Zhao Wei Jian , Zhang Duo
Published: July 2014

According to the actual structure, the ABAQUS finite element models of grouting-sleeve reinforcement-connection component with different sleeve-rib space were established, and the mechanical performance of component under the action of axial tension load was studied. Meanwhile, the stress distributions among sleeve with six kinds of sleeve-rib space by means of stress nephogram were obtained. Numerical simulation result shows that with the sleeve-rib space decreasing from 56mm to 8mm, the constraint capability of grouting material on reinforcement is better and better, and the internal force distribution in sleeve tends to be more homogeneous.
Seismic Response of Ductile Cast Iron Buried Pipeline with Socket Joint
Authors: Gu Fan , Zhang Duo , Zhou Jing Hai , Wang Wei
Published: July 2014

By means of ANSYS finite element software, the numerical model of ductile cast iron buried pipeline with flexible joint was established, and the entire model was comprised of pipeline and its exterior massive soil for simulating the coupling-interaction between soil and pipeline. Meanwhile, the multi-point excitation method was adopted for considering the wave-passage effect. According to EI-centro seismic wave record corresponding to III site, the stress-time-history curve of pipeline body and the displacement-time-history curve of flexible joint were obtained, as well as the most dangerous parts might occur leakage were indicated, which provides the reference to the optimal design of ductile cast iron buried pipeline with flexible joint.
The Temperature Stress Analysis and Design of Changge Stadium Body Structure
Authors: Zhang Hai Dong
Published: July 2014

The main structure of Changge stadium is super-long irregular rectangular plane structure. Under the effect of temperature changing, the internal force and deformation of the structure is complicated. The distribution discipline of temperature effect is concluded through PMSAP software. In the design, some reliable measures with the discipline of ‘resistance’ and ‘release’ are taken to ease the negative impact of the temperature effect.
Mechanical Plate-Shell Structure Vibration Analysis Based on ANSYS
Authors: Cai Li , Tan Yue Gang , Fan Li , Xie Yi
Published: July 2014

Analytical software has powerful features in structural analysis. This paper elaborates the modal of the mechanical plate-shell structure with three layers by ANSYS software ,from which natural frequencies and mode shapes are obtained. Based on this,taking the three layer structure applied with harmonic load as the study object,this paper analyzes the displacement change trend of different positions under different frequencies,and the displacement characteristic curves are obtained,which would provide a certain theoretical basis for the arrangement of measuring points and the yield characteristics analysis in subsequent structural detection.
Nonlinear Numerical Analysis of Transfer Column in SRC-RC Hybrid Structure
Authors: Sun Qian Qian , Zou Yun , Wang Qiang
Published: July 2014

Nonlinear numerical analysis of the stress performance of SRC-RC transfer columns was carried out in this paper with the finite element software of ABAQUS. Compered with the experimental result , numerical analysis result are found to be reasonable.Then the influence of factors such as extension length of shape steel , area ratio of shape steel and axial-load ratio were contrastively analyzed . The results show that extension length of shape steel and the area ratio of shape steel have a greater influence on the bearing capacity and the hysteretic performance of transfer column ,but axial-load ratio has less influence .
Elasto-Plastic Mechanical Behavior of Steel Box Stub Column under Cyclic Uniaxial Tensile and Compressive Load
Authors: Wang Zhan Fei , Ge Lin , Sun Bao Yun , Ma Yue , Liu Ke
Published: July 2014

In this paper, to study mechanical behavior of steel box stub column under cyclic uniaxial tensile and compressive load, elasto-plastic analysis of the segment is carried out by using ABAQUS package. In this study, with changing parameters (such as length-width ratio L/B, width-thickness ratio RR) of the box stub column, the hysteresis curves, skeleton curves, stress distribution and deformation of the ultimate state for the steel box stub-column are investigated. These results show the L/B and RR have little impact on the ultimate strength and ductility of stub-columns during the tensile stage. However, RR has obvious impact on the elasto-plastic mechanical behavior and local deformation under compressive load.
Reasonable Strength Criterion Research of High Arch Dam Based on Brittle Failure Constitutive Relation
Authors: Wang Zhi Qiang , Liu Wen Biao
Published: July 2014

The brittle failure finite element method is widely used in arch dam safety evaluation, but it also has some problems, the concrete strength criterion is different, the dam failure range is different. This article first introduces brittle failure constitutive relation and three strength criterions, then takes a high arch dam as an example to compute, obtains some conclusions that the relative failure range of foundation plane corresponds to blaxial strength criterion is slightly bigger than the result of uniaxial strength criterion, is almost the same as the result of triaxial strength criterion. Because the influence of the third principal stress is compressed stress to the dam crack is taken into account under multiaxial strength criterion, therefore using multiaxial strength criterion is more reasonable.
Pre-Stressed Reinforcement and Security Analysis of Tunnel Lining with Dislocation and Cracks
Authors: Zhang Jing Wei
Published: July 2014

Security of secondary lining is of utmost importance to tunnel engineering quality as the main bearing structure and the last water-prevent line for rock types I, II, III. Tunnel lining with dislocation and cracks is one of the most serious defects to secondary lining. Based on the case of Goujiagou tunnel, the potential threat is listed. The pre-stressed regulation scheme is designed, and the parameters are determined. The loose surrounding rock pressure on lining is calculated by P's theory. Based on the results, the numerical simulation model is build by means of FES code ANSYS; and the internal pressure before and after the reinforcement is analyzed. According to the above-mentioned research results, this paper calculated the safety factor, and checked the structure strength. Research results indicate that the regulation design is feasible and the pre-stressed parameters are appropriate. The results will provide reference to design for dislocation and cracks of tunnel lining.
Study on Emergency Evacuation in the Subway Fire Accidents
Authors: Xie Hua , Xu Yan Ying , Zhang Xu , Chen Jian
Published: July 2014

The fire accident is a substantial risk in the subway due to the complexity of the underground construction confined space, which can cause a large number of human fatalities. Therefore, some effort should be made to promote the public security in subway fire accidents. Among of them, the establishment of emergency evacuation plan is very important in fire safety design and should be paid enough attention because it can provide beneficial help to life safety. The evacuation strategy including the evacuation route and evacuation safety zone are detailedly discussed in this paper, which lays the foundation for future studies of safe evacuation in the subway fire accidents.
Metro Station Deformation Caused by Deep Foundation Pit Construction
Authors: Xin Chun Lei , Gao Bo
Published: July 2014

Many excavation and backfill methods can be used to construct a deep foundation pit, but foundation pit construction will undoubtedly affects security of existing metro station. This research based on a transfer station of Chengdu Metro, three-dimensional numerical simulation method was used to analyze the deformation of metro station by changing construction methods of foundation pit. The results show that: (1) Both excavation and backfill methods of foundation pit have a significant effect on connection segments of metro station. (2) The main body of metro station is largely unaffected by foundation pit construction but it has been in the process of subsidence. (3) The more the construction steps of foundation pit are, the more slowly the displacement of metro station changes. The above results certainly contribute to research and develop new types of construction methods for complicated metro station.
New Developments and Applications in Rail Transit Construction Technology
Authors: Li Run Jun , Shan Ren Liang , Liao Qiu Lin , Wu Fu Mei
Published: July 2014

Combining with the practical engineering case, the paper summarizes the shallow mining method construction mechanism, construction methods and auxiliary technology. Aiming at the problems in the shield construction, the paper introduces the shield machine equipment’s latest comprehensive construction and technology, especially the shield technology dealing with the conglomerate stratum where the water and boulders is rich. It fills the domestic blank; Deep grouting and pipe roof reinforcement technology are aimed at the specific sources of risk; Whole cross-section of pallet trucks, electric vehicles, automatic metering and other new equipment have been widely applied to the construction site.
Numbering Analysis of Ground Settlement by Shield Method Based on the Model of Corrected ‘Equivalent Circle Zone’
Authors: Zhou Ze Lin , Chen Shou Gen
Published: July 2014

Through the analysis of ‘gap parameter’ and ground movement pattern in shield tunnel, this paper researched and corrected the model of ‘equivalent circle zone’ proposed by predecessors. The ‘equivalent circle zone’, which is a comprehensive reflection of shield gap, grouting filling and stratum perturbation, is considered to be unequal thickness in this paper. With the measured data of practical shield tunneling, the unknown parameters of corrected ‘equivalent circle model’ can be obtained by back analysis through numbering analysis. The back analysis of Shen Zhen line-5 is carried out to validate the rationality of the method proposed in this paper. Research shows that: the corrected model can reflect the feature and values of ground settlement more factually than the previous model and can offer a reference to predict ground deformation during shield tunneling.