bluuebunny/crossref_metadata_2025 huggingface dataset:
Structural Analysis and Consolidation Strategy of the Historic Mediceo Aqueduct in Pisa (Italy)
Authors: Andreini Marco , de Falco Anna , Giresini Linda , Sassu Mauro
Published: August 2013

The present work assesses the state of conservation of the historical Mediceo Aqueduct in Pisa, with classification of architectural elements, decay of materials and failures in view of the restoration. The preview of collapses and the design of interventions in a significant part of the aqueduct are performed. New masonry buttresses for the entire path with optimal distribution are determined to ensure safety and integrity to the monument.
The Experimental Study on Steel Crane-Girder before and after Reinforcement
Authors: Cao Fu Bo , Wei Hong Gang , Cheng Zhi Hui
Published: August 2013

This article focuses on a cracking steel crane girder of one factory, on the basis of extensive investigation and research on the fatigue damage of cracking steel crane girder at home and abroad. Sectional stress is redistribution and the stress concentration phenomenon of the crack tip has been alleviated. After reinforcement, the local stiffness of the upper flange and web greatly increases, The results show that it can extend the fatigue remaining service life of fatigue cracking of the steel crane girder by increasing the effective cross section area and stiffness, and it is a good guide on reinforcement and maintenance of actual industrial plant cracking steel crane girder.
Overview of Consolidation Method and Application for the Culvert under the Small or Medium-Sized Earth-Rock Dams
Authors: Xue Jian Rong , Zhang Ying Ying , Shi Xiang Yang
Published: August 2013

At present, China's small and medium-sized earth-rock DAMS were built in the early days after liberation, usually the water conveyance structures are culverts under the dams. Owing to the poor operation managements and disrepair, and the restriction and effects of economy and technology, then, the majority of culverts had various problems in seepage. In combination with years of experience in dealing with defective reservoirs, I summarized the common problems of the culvert and reinforcement methods.
Cracking Mechanism and Strengthen Method of Reinforced Concrete Hammerhead Piers
Authors: Tang Guo Bin , Wang Tong Ning , Hu Feng
Published: August 2013

This paper indicates cracking mechanism and strengthening method of reinfoced concrete hammerhead piers. A field investigation phase has been undertaken in conjunction with analytical studies to model the cracking process. It is shown that the front cracks in the pier cap developed because the bending tensile stress far exceeds the tensile strength, while the side crack caused by none bursting reinforcement. Based on the analysis results, an internally prestressing approach is provided, and the retrofitting effect is verified by finite element analysis. Strengthening with internally prestressed tendons of bridge pier cap is proven to be a reliable and relatively easy-to-install technique.
Study on Experiment of Terminal Fixture Connection of Steel Wire Rope
Authors: Cui Xi Guang , Geng Jie , Ding Jian Wei
Published: August 2013

This paper makes some experiments on steel wire rope terminal fixture connection in strengthening with steel wire mesh and polymer mortar, discusses the performance of terminal fixture connection and the analysis of the experiments and dates show that: The connection of the three aluminium-alloy swaged ferrules with the same arranged for steel wire rope or two wire rope grips meet the design requirements of rules and regulations, and three wire rope grips can give full play to the high tensile mechanical performance of steel wire rope.
Analysis on Stiff Frame in Replacement of Closure Segment for Prestressed Concrete Cable-Stayed Bridges
Authors: Li Hong Jiang , Lu Da Yi , Wang Qi Feng
Published: August 2013

Stiff frame was the important structural member in construction of replacement of closure segment for prestressed concrete cable-stayed bridges. To establish the design calculation method of it and reveal its variation of internal forces with construction stages of replacement, some configurations and its working process of stiff frame was introduced. Based on construction stage analysis of replacement, calculation methods of its strength and stability were given. Through FEM results, influence of stiff frame to structural dynamic property and global stability of whole bridge were described. Analysis results showed, it was appropriate to consider each section steel of stiff frame as eccentric compression member. During construction, the transversal global property of stiff frame and the security of its link with main girder must be valued. Construction results also proved, the theoretical calculation method could reflect the actual structural state of stiff frame, and its result was conservative. Analysis on stiff frame was an important part of replacement of closure segment, and could provide ways and references for construction control of replacement of closure segment.
Experimental Study on Reinforced Concrete Profiled Pipe Culvert
Authors: Zhang Jun , Hu Xiang Yu
Published: August 2013

It is supposed to be constructed a kind of profiled pipe culvert which have a new type of cross, in view of the reinforced concrete circular culvert's various diseases that occurred in service of it. In order to know about the mechanical characters of structure, and test the carrying capacity of the profiled pipe culvert, the load test can be used to have a research on the stress, deformation characteristics, and crack distribution and development on the profiled pipe culvert.
Rapid Treatment Technique of Diseases of the Rocking Axle Bearing of Railway Simply Supported Beam Bridge
Authors: Huang Jun Jie , Su Qian , Zhang Li Cai , Li Yu Jie , Liu Bao
Published: August 2013

The bearing is the important part that connects the superstructure and substructure of bridge, in which diseases occur affects the running safety. In this paper, take the diseases of the rocking axle bearing of railway prestressed concrete T-beam bridge as the backing, the special equipment of backing plate of the bearing bottom plate is produced by one's own master development. The technical scheme of rectification and uplift of the bearing during maintaining sky-light of the operating line is researched. Rapid treatment technique of inclined bearing and track irregularity caused by settlement of the bridge foundation is proposed. The research can be used for reference for similar bearing diseases regulation projects.
Structural Optimization of Elevated Building
Authors: Wang Yi Yang , Wang Chen Chen
Published: August 2013

This paper finds that the elevated building normally located in Chongqings mountainous areas can be optimized in both integral structure and individual elements. Through the calculation of typical structure, the weaknesses of elevated building are the unevenness of the internal force caused by external loads and the over-length of supporting bars. Meanwhile, through the way of numerical modeling which uses the features of two-dimensional member bar system, specific solutions are pointed out. The conclusion can be drawn through the analysis of results and data that the more direct the method of transferring force is, the more stable the structure is. In addition, within the experience of practical engineering programs, strengths and weaknesses are also put forward through comparing measures within themselves, which can enhance the ability to resist the impulsive or extreme external force.
Concrete Bridge Structure Crack Analysis and Treatment Countermeasures
Authors: Chen Kai
Published: August 2013

With the fast development of economy, science and technology, concrete has been widely used in bridge construction. But the problem of concrete bridge structure crack is still an important issue in bridge construction in China. How to combine the bridge foundation theory with the practice of construction to solve the problem of concrete bridge structure crack is the key to guarantee the quality of bridge construction. This paper focuses on the cause analysis of concrete bridge structure cracks and the treatment countermeasures are put forward.
The Cause and Control of Cracks about the Fly Ash Foam Composite Light Wallboard
Authors: Sun Yue Dong , Hou Peng Fei
Published: August 2013

The combination of a number of construction experience, which is based on the analysis of different parts of the fly ash foam composite light wallboard wall cracks. Appropriate preventive and remedial measures were put, specific elaboration was done, which were used to guide practice and reduce light wallboard wall cracks.
Non-Probabilistic Reliability of RC Bridge Retrofitted in Flexure with Externally Bonded Steel Plates
Authors: Li Shi Jun , Chen Xu Yong
Published: August 2013

Sufficient information about uncertain parameters is unavailable and very costly in the conventional reliability analysis of the retrofitted RC bridge. The non-probabilistic convex set only requires small samples to obtain the variation bounds of uncertain parameters. An interval set denotes the variation range of an uncertain parameter, and two convex sets reflect the relationships of uncertainty parameters. The non-probabilistic reliability analysis model is developed based on limit-state function and convex model. The non-probabilistic reliability index is solved by the gradient projection method. The engineering example shows that the non-probabilistic reliability is reasonable and economical, and perfects the method and theory of reliability analysis for the retrofitted BC bridge.
Experimental Research on Residual Strength of Concrete under Fatigue Loading and Corrosion of Magnesium Nitrate
Authors: Meng Xian Hong , Zhang Yu Xian , Zhou Jing Hai , Xu Rui
Published: August 2013

At Present, stress corrosion and corrosion fatigue causing durability degradation of concrete structure in the field of civil engineering become an important problem,and thus become a hot topic to study. But the research on it at home and abroad is still in stage of theoretical exploration. This paper using self-designed corrosion fatigue loading test device, studied in magnesium nitrate solution of concrete under the action of erosion strength increasing regularity, results show that the concrete strength by corrosion fatigue than fatigue specimen attenuation extent.
Research on Structural Present State and Damage Reasons of Ancient Tibetan Buildings
Authors: Li Peng , Yang Na , Wang Yang
Published: August 2013

Due to different structural form, surrounding environment and external force, the damage of Ancient Tibetan buildings reflects its own characteristics. In this paper, the damage types of ancient Tibetan buildings are classified based on fieldwork, and then the damage reasons are studied. The main failure modes of ancient Tibetan buildings are damages and deformations of timber components and walls, including cracking and deflection of beams, column cracking, Queti slating, decay and cracking of rafters and cracking in walls. The damage reasons of ancient Tibetan buildings can be attributed to three aspects: degradations of timbers, structural defects and long-term external forces.
Safety Assessment Method Based on Response Spectrum Analysis of Building Structures to Blasting Vibration
Authors: Chen Chao , Gan De Qing , Zhang Ya Bin
Published: August 2013

t is Founded that SR can comprehensively reflect the general effect of the blasting vibration and the influences of Structural damage of vibration by structure dynamic characteristics. The computation and the analysis of 132 groups blasting vibration data indicates that probability of destroying of general houses by blasting vibration increases significantly when [SR]5.5. And then the [SR]5.5 is used as a supplementary of blasting vibration damage safety criterion standard of 2sd construction. On this basis, the unified security criterion of blasting vibration safety is initially founded through introducing the concept of Prs of structures blasting vibration spectrum safety factor.
Study on Shear Resistance and Durability of CFRP Reinforced Concrete Beams
Authors: Chen Shuang
Published: August 2013

Through carrying capacity test of CFRP strengthened test beam and unstrengthened comparison beam under corrosion of chlorine ion, thispaper analyzes the shear resistance and durability of CFRP repaired and strengthened concrete beam. Crack generation, deflection, electrochemical index and deformation of reinforced concrete beam under service are comparedand analyzed. It is indicated that CFRP can play a favorable screening role and can effectively prevent crack development. There is no shear failure after load is applied. So CFRP can obviously improve the shear bearing capacity and durability of reinforced concrete beam. Besides, different strengthening methods have relatively obvious influence of its durability.
Research on Dynamic Characteristics of Isolated System for Irregular Structures
Authors: Xiang Wei Ming , Zheng Xian Chang , Zhou Yan Jie
Published: August 2013

This paper analyzes isolation questions of irregular structures, based on principles of structural isolation system. It also discusses present research and existing problems of translational torsion coupling isolated structures. Property parameters of layer unit are used to build up stiffness, mass and damping matrix of sway components, and dynamical calculation method of isolation system is explored when considering floor deformation. In this paper, the authors set up simplified calculation model for dynamic reaction of plane irregular buildings by using substructure method and taking floor as shear bending deep beam, quadratic displacement function and primary angle function are also used to describe floor movements. Time –history method is adopted to analyze dynamic responses of floor deformation for plane irregular buildings (T and U shapes).
Reinforcement and Fiber to Induce Ductile Behavior of Ultra High Performance Steel Fiber Concrete
Authors: Dong Heng , Feng Su Li
Published: August 2013

To induce the ductile behavior of ultra high performance concrete beams, the experiments to find out the best composition of volume fraction of steel fiber and ratio of reinforcement bar were carried out. 15 UHPC beams which have various combinations of volume fraction of steel fiber and ratio of reinforcement bar. The reinforcement bars was consist of 2×1, 3×3, 4×4, 5×4. The volume fractions of steel fibers were 0%, 0.7%, 1%, 1.5%, 2%. The beam which has 0% volume fraction with the close placement reinforcement bar has little effect on ductile behavior. At least 0.7% volume fraction with the close placement reinforcement bar guarantees the ductile behavior of UHPC beam.
Plastic Analysis on the Semi-Rigid Steel Frame-Composite Steel Plate Shear Wall Structure
Authors: Peng Xiao Tong , Hou Ying Ying , Xia Lei
Published: August 2013

The semi-rigid steel frame-composite steel plate shear wall structure (SCSW) effectively improves the lateral stiffness of shear wall, making it possible to use the semi-rigid joint. In order to study the plastic failure mechanism of SCSW, a plastic model is established, in which the effects of the rotations of semi-rigid joints and yield deformations of infill steel walls on the energy consumption are considered. Based on that, a design method for the lateral ultimate strength is put forward and a nonlinear FEM model is setup using ANSYS. Through the comparison between plastic analysis results with the finite element results, it is shown that the plastic analysis method is feasible and has a safe redundancy.
Analysis and Design of Cable-Membrane Architectural Structure
Authors: Li Na , Ji Jing
Published: August 2013

The test and theoretical analysis of full-scale cable membrane structure are less, and the author carried out simulation analysis of full scale cable-membrane structure with 30m by ANSYS software, finite element realistically model of cable membrane structure was established based on the assumption. By applying the temperature loads form-finding of membrane is achieved. By self-equilibrium nonlinear solution, the deformation and the stress distribution of this structure are gotten, finally construction methods of the node and the supporting members are given. These can provide the theory support for improving the spatial structure, and can provide reference for design and construction of similar engineering.
To Improve the Appearance Quality of Concrete Special-Shaped Frame Column
Authors: Zhang Hua Zhi , Pan Fang , Zhang Zhen Hua , Cheng Cai Yun
Published: August 2013

In order to meet the growing needs of people, many buildings are used in special-shaped frame column, but because of the size and shape of special-shaped columns and other causes of concrete appearance quality is not high, by the QC group activity, cause analysis of special-shaped frame column concrete surface defects, and how to guarantee and improve the appearance quality of concrete special-shaped columns is proposed to solve the method, to eliminate the common quality defects of concrete surface and special-shaped columns.
Test Study on the Mechanical Behavior of Recycled Aggregate Concrete Wall-Beam
Authors: Zhang Min , Fu Xiao Jian , Wu Yang , Sun Hao
Published: August 2013

A new type of wall-beam was put forward, of which the upper wall is replaced by recycled aggregate concrete whose coarse aggregate is made of the waste brick. Three recycled aggregate concrete wall-walls and three ordinary brick wall-beams were tested, and then the bearing capacity, stress-strain relationship, cracking load and failure mode were analyzed. The results show that: the structural integrity of recycled aggregate concrete wall-beam is better than ordinary brick wall-beam, and the increase of the depth of joist can improve the mechanical behavior of wall-beam structure under the condition of same depth-span ratio.
Three-Dimensional Dynamic Analysis on Soil-Structure Applying Mixed Linear-Nonlinear Substructure Method
Authors: Jiang Nan , Wang Fei
Published: August 2013

To increase the computation efficiency of the three-dimensional nonlinear dynamic analysis of soil-structure, the liner-nonlinear mixed constrained mode synthesis method was put forward according to the characteristic that the structure owns local plastic region, which is appropriate for both nonlinear substructure and multi linear substructures with boundary coupling. Divided the whole system into linear substructure and nonlinear substructure, this method reduced the freedom degree of linear substructure according to the potential energy criterion and finally synthesized them with the nonlinear substructure, thus obtaining the dynamic response of nonlinear system. The accuracy and effectiveness of this method were proved by further applying this method in the three-dimensional dynamic analysis example of soil-high building interaction system to carry out dynamic time-history analyses under the effect of multi-groups earthquake incentives respectively for two different boundary conditions of soil mass. Finally, several groups of numerical experimentations were conducted based on the various different values of nonlinear soil mass region, and the result indicated that as far as the example of this paper was concerned, it can obtain satisfiable computation result when the range of nonlinear soil mass region was 3 times of the horizontal size of upper structure, which further demonstrated the effectiveness of the method proposed in this paper.
Seismic Strengthening of Masonry School Building with Steel Mesh Mortar Splint
Authors: Wu Hao , Zhao Shi Chun , Xu Hu
Published: August 2013

Quasi-static test on a half-scale two-story masonry model was carried out to study the seismic strengthening performance and damage characteristic of existing masonry school buildings. The wall piers between openings were partially strengthened with steel mesh mortar splint where the steel mesh is reliably anchored using vertical reinforcements. The results show that strong pier-weak spandrel failure mechanism is guaranteed due to the formation of global failure mechanism. The failure characteristic, energy dissipation capacity and load bearing capacity of masonry structure are significantly improved.
Research Progress on Bending Strength Calculation of Biaxial Compression-Bending Reinforced Concrete Column
Authors: Liu Chun Yang , Li Zhen Bao , Qu Shuang , Zhou Xue Jun , Wang Xin Ping
Published: August 2013

Lots of bulidings had collapsed in Wenchuan big earthquake in 2008, one important reason is that the structure design has been launched only in X or Y axis of the building respectively, which means the oblique direction compression-bending characteristic has not been fully considered in the actual structure design process. In addition, the moment bearing strength in oblique direction is smaller than the moment strength about the principle axis of the column, so the research on bending strength calculation of biaxial/oblique compression-bending RC column is important to improve the aseismic safty of the buildings under actual earthquake effects. In this paper research achievements about bearing capacity calculation of column under oblique compression-bending action are summarized and analyzed. At last the advice for actual application has also been given.
Towards Light-Weight Composite Construction: Innovative Shear Connector for Composite Beams
Authors: Bamaga S.O. , Tahir M.Md.
Published: August 2013

Introducing low cost housing is one of the challenges face civil engineers now-days. Using lightweight construction materials i.e. cold formed steel sections is an alternate solution to overcome the challenge. In this study, a lightweight composite beam was introduced. It consists of cold formed steel section and profiled concrete slab. Experimental push tests were conducted to investigate the ductility and strength capacities of new and innovative shear connectors. The shear connectors were easy to form and give advantages to speed up the fabrication process of the proposed composite beam. The shear connectors showed large deformation and strength capacities. It is concluded that the proposed shear connectors could be used for lightweight composite beams.
Failure Mechanism of a Steel Frame under Oblique Seismic Action
Authors: Li Zhen Bao , Liu Li Fei , Wang Hai Teng , Wang Wen Jing
Published: August 2013

Pushover anlysis of a three-story one-span space frame under oblique seismic action was conducted using ABAQUS software. The loading angle is 0°, 15°, 30° and 45° respectively. Failure mechanism of the space frame was analyzed, such as yield sequence of beam end and column end, and force-displacement curves. The results indicate that the structure loaded with angle of 0° failed when beam hinge appeared. With the increasing of load angle, the failure mechanism of frame changed from beam hinge failure to column hinge failure gradually.
Analysis and Research on Reinforcement and Reconstruction Method of Adding Shear Wall for Multi-Story Frame Structure
Authors: Liu Cheng Qing , Li Jun Jun , Chen Chi , Tu Zhi Bin , Sun Xiao Dan , He Bin
Published: August 2013

Recently, earthquakes occurred frequently, and our country has established a new seismic code. As the seismic intensity increases, some low frame structures cannot reach the requirements of layer displacement, layer displacement angle, stability, etc. Thus, they require reinforcement. The shear wall is good for resisting lateral force, and rational shear wall can control the shifting and shaking efficiently, thus making the distribution of internal force more reasonable. Through analysis on reinforcement and reconstruction method of adding shear walls for multi-story frame structure, the rules in terms of different layer displacement, layer displacement angle and overturning moment are found out, and the added shear wall, which can efficiently improve seismic fortification intensity, can serve as the main component for resisting lateral force. The conclusions are as follows: under earthquake action, through the method of adding shear wall, the deformation, layer displacement and layer displacement angle can be controlled effectively. Besides, the integrity and seismic behavior are inhanced, achieving the goal of improving anti-seismic grade of structure.
Mechanical Behavior Research for the Interior Joint of New Light-Weight Portal Rigid Frame (II)
Authors: Huang Zhi , Jiang Li Zhong , Zhou Wang Bao
Published: August 2013

Based on nonlinear finite element structural analysis method, finite element analysis software of SAP2000 is used in the analysis of middle column divided into two parts on the top the mechanical behavior with prestressed cable for portal frame. In order to consider the effect to force performance, the articulated and rigid in the column base, forking geometric parameters and the cable initial prestressed value parameters of the new structure are studied. The calculation results show that its avail for the frame if the angle of the dividing is thirty. Initial prestressed value of the cable is not the bigger the better and there are different best values in different angles of the bifurcation. In addition, some corresponding design proposal is obtained according to the analysis of the internal force.
Wind-Induced Dynamic Analysis and Construction Measures of Large Diameter Spherical Tank
Authors: Xu Bao Hui , Ji Jing
Published: August 2013

It is easy for the bulky spherical tank to take place wind-induced buckling under wind load, combined with the Daqing region specific practical engineering, simulation analysis of spherical tank system with 15.7m under random wind loads has been carried out by using ANSYS finite element software. The author investigates the mechanical properties of spherical tanks with the actions of self-weight and wind load, and obtains the deformation and stress distribution law of the tank, pillars and drawbars, at last construction suggestions of spherical tank is given, and these can provide technical support for improving the actual design for large spherical tank.
Analysis of Mechanics Characteristics of Prestressed Steel Beam in High Temperature (Fire) Condition
Authors: Sun Qiang , Tian Wei , Wang Ding Tang
Published: August 2013

According to the requirements of fire science theory and structural fire resistance design, and the situation of possible disasters that may occur in the building based on practical project, this paper analyzes the mechanical characteristics of prestressed steel beam under high temperature (fire) circumstances. It puts forward how to consider the effects of parameters of different steel categories, the magnitude of prestress tension control forces and prestressed loss of steel cables on the structural bearing capacity in prestressed steel beam design, which can provide references for the fire resistance design of prestressed steel structures.
The Influence of Initial Guy Cable Prestress on Single-Mast Guyed Towers Mechanical Properties
Authors: Yang Wen Gang , Zhang Kai , Wang Zhang Qi , Ge Yong Qing
Published: August 2013

A single-mast guyed tower recommended by a UHV DC transmission line was set as an example. To study initial guy cable prestresss influence on guyed towers mechanical properties, the guyed tower under wind load was analyzed with finite element method considering geometry nonlinearity. Result shows: when initial guy cable prestress is less than critical guy cable prestress, with the growth of initial guy cable prestress, nodes displacement decreases, guy cables work stress and leg members axial force stay; when initial guy cable prestress is greater than critical guy cable prestress, with the growth of initial guy cable prestress, nodes displacement stays, guy cables work stress and leg members axial force proceed a linear increase.
Study for Dynamic Stability Behavior of I-Section Cantilever Beam under Axis Compressive Load
Authors: Chen Y. J. , Luo Q. Z.
Published: August 2013

By mean of the energy functional variational principle and considering shear lag effect of flange, the dynamic governing differential equation for the I-section cantilever beam in the action of compressive loadPat the member end is obtained. The equation is solved by the separation variable method. According to the weigh residual method, the relation between natural frequency coefficient and critical load coefficient as well as the flutter critical load coefficient are made, the influence of shear lag effect on natural frequency coefficient and critical load coefficient is discussed.
Method for Evaluating the Flexural Stiffness Bar of Reinforced Concrete Structures
Authors: Fenollosa E. , Alonso-Durá Adolfo , Llopis V
Published: August 2013

The structural design methods development nowadays allows including the effects of geometric and mechanical nonlinearity of the materials in the analysis itself. The resolution through matrixes methods frequently involves an incremental treatment for load application and a tangent stiffness matrix that bears in mind the nonlinearity. The present paper shows a procedure to evaluate the bar stiffness considering mechanical nonlinearity of materials. For structures of reinforced concrete formed by two materials where each of them has a resistant behavior so different from the other, its appropriated evaluation is, at the same time, necessary and especially complex. The iterative process exposed here provides the equilibrium position of the section to the general case of axial force and biaxial bending taking into account the nonlinear constituent relationships of materials. Once the equilibrium is reached, the relationship between the biaxial moment and the curvature allows the section stiffness module to be derived, from which the bar stiffness will be determined. As an application of the exposed procedure, the iterative process of the equilibrium research in a section of reinforced concrete is showed. At the moment-curvature diagram can be observed the stiffness progressive decreasing as biaxial bending moments are increasing, because of materials nonlinearity stresses and strains and the section inertia reduction produced by concrete cracking.
The Hysteretic Property Study of Cross Steel Reinforced Concrete Special-Shaped Column in Different Axial Compression Ratios
Authors: Xu Ya Feng , Li Ri Liang , Bai Shou Yan
Published: August 2013

In this paper, the finite element analysis software ABAQUS is used to study the hysteretic property of cross steel reinforced concrete special-shaped column in different axial compression ratios. In the same condition, we can get the deformation diagram of cross steel reinforced concrete special-shaped column which the axial compressive ratio is 0.0, 0.4, 0.5, 0.6, 0.7 and 0.8 by changing the axial load of the column, then extract the hysteretic curve and skeleton curve. By contrast, it can be seen that the hysteretic property of column reduce with the increasing of axial compression ratio, and the ultimate bearing capacity of column also reduce with the increasing of axial compression ratio.
Study on the Diaphragm Effect of the Beam Type Bridge
Authors: Yang Liu , Li Zhi Da , Peng Rong
Published: August 2013

Our country bridge design code prescribe beam bridge often set the diaphragm to strengthen transverse connection. However, many countries think the beam bridge can reduce or do not set diaphragm. This paper respectively analyzed the deflection and stress of straight T beam bridge and curved box girder bridge with or without diaphragm, further demonstrated the diaphragm settings are necessary in straight beam bridge and curved beam bridge, especially when the vehicle and bridge width gradually increase, the diaphragm right force analysis and design becomes more and more important, it become an important part of the whole bridge design.
The Element Analysis on Hysteretic Property of Cross Steel Reinforced Concrete Special-Shaped Column in Different Rates of Steel Bone
Authors: Li Ri Liang , Xu Ya Feng , Bai Shou Yan
Published: August 2013

In this paper, we study the effect of rate of steel bone for the hysteretic property of cross steel reinforced concrete special-shaped column in the same horizontal cyclic load when they have the same axial compression ratio. We use the finite element analysis software ABAQUS to get the deformation pattern by establishing models of column, choosing the constitutive relation reasonably and determining the type of unit. We apply the data of simulation to draw the hysteretic curve and the skeleton curve, and then we analyze the hysteretic property by using the curve and the data. By contrast, it can be seen that the hysteretic property of column enhance with the increasing of rate of steel bone, and the ultimate bearing capacity of column also enhance with the increasing of rate of steel bone.
Structural Strength Analysis of Main Crane Pedestal of the Jack-Up Wind Turbine Installation Vessel
Authors: Zhu Xiang , Tang Yong Sheng , Li Fei Xiang , Zhao Yao
Published: August 2013

The jack-up wind turbine installation vessel is a special kind of vessel for building the offshore wind power farm. The main crane pedestal, which is the supporting structure of the crane on the main deck of the vessel, is always under high level loads when the ship is in operation condition. In this paper, the structural strength analysis of main crane pedestal of the jack-up wind turbine installation vessel was presented. The direct calculated method was used to evaluate the strength of the main crane pedestal. The FE model of main crane pedestal was established with refined mesh, and the adjoining hull structure was also modeled to provide accurate boundary condition. Considering the permanent loads, variable loads (crane loads) and wind loads on the pedestal, the load combinations were defined for the ultimate limit state for every 45 degree. The deformation and stress of the pedestal and the hull structures were calculated and checked. The results showed that all stress results were within the maximum allowable stresses. The critical areas are often located at the link region of hull and pedestal.
Analysis of the Shock-Absorbing Performance of Buckling Restrained Brace for High-Rise Buildings
Authors: Yuan Ji Xing , Zhang Qing , Qin Gui Hu , Liu Ruo Fei
Published: August 2013

Buckling restrained brace is an economical tool for shock-absorbing. In this paper, it was used in a high-rise building. The shock-absorbing performance of the brace was analyzed under frequent earthquake condition with engineering software. It was found that with buckling restrained brace, the dynamic characteristics of the structure is changed, and the peak of the dynamic response is suppressed, making the storey drift of the structure meets the regulations.
Shear Strength of Connections between Concrete Filled Steel Tubes and Beams
Authors: Jian Li
Published: August 2013

Departure from the stress state of the steel pipe concrete dye column node, axial force, steel pipe column end moments and stained end vertical shear strength Shear strength concrete filled steel tube the formula, using the finite element analysis software ANSYS to establish a three-dimensional nonlinear finite element model, comparing the results calculated by the finite element calculations and formulas seen, the model is applied to the concrete filled steel tube - steel beam finite element nodes analysis.
Structural Design of Yunnan Ruili Spa Resort Sightseeing Tower
Authors: He Xi , Song Jing Xu , Pan Wen
Published: August 2013

Yunnan Ruili spa resort sightseeing tower is a high-rise hybrid structure building, which is 52.8 meters in height. In the design process, for the purpose of ensuring the correctness and reliability of the model analysis and design, general finite element analysis software SATWE and ETABS are used for flexible modeling and analysis. Through controlling and adjusting related parameters, the reasonable calculation results are obtained, which can be regarded as the basis of the design. In this paper, relevant problems are also discussed for the foundation design and superstructure design of the tower.
Finite Element Analysis on Frame Structure of Light Steel Temporary Buildings
Authors: Zhang Zheng , Cai Xue Feng , Ma Yong Chao , Zhou Ji Zhong
Published: August 2013

Light steel temporary building is commonly used in the construction site, with advantages on simple structure, repeat used and small deadweight. For light steel temporary structure building there are still not enough researches on the mechanical properties and mechanism of action, and there are still not enough relevant standards and requirements to conduct the design and construction of the buildings. In order to precede to theoretical study on frame structure of light steel temporary buildings a method by Finite Element Analysis was proposed. This method is based on FEA software, Ansys. Using this method a monolayer frame structure and a two-story frame structure and a trilaminar frame structure model were analyzed. The calculation results of horizontal displacements under design loads by FEA were obtained and discussed.
The Application of Plate Buckling Theory in the Steel Structures
Authors: Wu Zong Liang , Zheng Hui Jun
Published: August 2013

Based on the width-to-thickness ratio of plates, four types of sections are proposed and post-buckling design, elastic design, elastic-plastic design and plastic design are employed respectively. Taking the post-buckling strength of plates into consideration, cold-formed thin-wall steel structures shall adopt calculation by effective width, also post-buckling design, and the restrain coefficient k1 of the plate groups shall be used. The direct strength method is quite convenient but needs the finite strip method. The computation of medially stiffened plates and distortional buckling has been figured out and thus further research and supplement are necessary.
Analysis on Bearing Capacity of Double Back-to-Back Cold-Formed Thin-Walled C Steel Composite Column with Gusset Plate
Authors: Chen Ming , Lu Wen Wen , Liu Kai
Published: August 2013

According to the composite column of double back to back cold-formed thin-walled C steel connected with gusset plate, the experiment and finite element analysis were carried out to study the stability bearing capacity and failure modes of columns under eccentric loading. The factors such as slenderness ratio, eccentricity, gusset plate thickness and spacing were discussed, which produced the impacts to bearing capacity, and the relationship between stiffness and axial load. The results revealed that the failure modes belonged to the in-plane-flexural buckling and local-buckling of the pressurized flanges and webs of the columns. Slenderness ratio, eccentricity and gusset plate spacing are the major factors that affected the mechanical behavior, while the gusset plate thickness has no obvious impact. In the end, compared with the calculation of the bearing capacity of the cold-formed thin-walled column and GB50018-2002, some suggestions based on this composite column calculation were put forward, and the correction coefficient of bearing capacity of the composite columns were given.
Comparative Analysis of Finite Element Method and Analytical Method on the Truss
Authors: Liu Hai Bo , Liu Yu Li , Zhang Li Hua
Published: August 2013

This paper takes a typical truss as an example, respectively to using the analytical method and the finite element method for the internal force is calculated, the calculation results show that the two error within a reasonable range, the analytical method is to many assumptions as the premise, the calculation is the main force, the main force is not fully representative of truss real stress state, and the finite element method considering the situation in a more general and general, so the results are relatively reliable
Nonlinear Numerical Analysis of Frame Side Joint
Authors: Wan Zhi Wei , Zou Yun , Kong Jie , Li Cheng
Published: August 2013

Nonlinear numerical analysis for the stress performance of frame Side Joint is processed in this paper with the finite element software of ABAQUS. Compared with experimental results, numerical analysis results are found to be reasonable. Then the influence of factors such as reinforcement ratios, stirrup ratio and axial compression ratio are contrastively analyzed. The results show that reinforcement ratios have a greater influence on the bearing capacity and hysteretic performance of the structure, but the stirrup ratio and the axial compression ratio have less influence.
Relationship between Half-Cell Potentials and Load Carrying Capacity of Corroded Reinforced Concrete Beam-Column Joints
Authors: Li Ming , Shen De Jian , Yang Jie , Cui Zheng Hua
Published: August 2013

This paper aims at detailed investigation on the relationship between half-cell potentials and load carrying capacity of corroded RC beam-column joints. There are four specimens in the test with the corrosion rate to 0%, 3%, 9% and 15%. Results show that the potentials of normal joint are larger than that of corroded damaged joints. As the corrosion rate of joints increases, load carrying capacity and half-cell potentials decrease. Analytical method based on the values of half-cell potentials to evaluate the load carrying capacity of corroded joint is presented. Comparing the analytical and experimental results, the proposed method can predict the load carrying capacity of corroded reinforced concrete beam-column joints.
Study on Failure Trend of Double Column Deflection Machine Structure on Basis of Static Strength Analysis
Authors: Cao Sheng Yong , Xuan Liang , Sun Ying Shi
Published: August 2013

To ensure the safe use of double column deflection machine for processing and manufacturing railway vehicles. This paper analyzes the use conditions of double column deflection machine, and makes a contact nonlinear finite element analysis on various typical use conditions. The positions of parts subject to danger can be found out through the results of static strength analysis, which finds out the weaknesses and prejudges the failure trend of parts, and which provides guidance for prejudging the faults in actual production and can prevent occurrence of accidents.
Analysis of Ductility Features in Bearing Failure Process for Cable-Strut Arch Structures under the Load Combined Full Span and Half Span Loads
Authors: Jiang You Bao , Liao Guo Yu
Published: August 2013

The current research work lacks systematizations on ductility features in failure process for cable-strut arch structures. To improve this disadvantage, an intensive study is performed with the strategies of experimental verification and finite element analysis. Firstly, considering the mechanical characteristics of cable-strut arch structures, a calculation method of displacement ductility are proposed to analyze its features in failure process. On this basis, the law of ductility features on bearing failure for cable-strut arch structures, is studied through the analysis of the results of experimental verification and finite element analysis. It indicates that their failures are brittle. It provides some references for the reasonable design of these structures.
Stability Prediction on Mathieu Equation of Delayed Periodic Term Based on Full-Discretization Method
Authors: Meng Liang , Li Ming Zhen , Li Shan Jun , Zhang Yan Lin
Published: August 2013

Delay Periodic Mathieu Equation (DPME), a kind of Delay differential equation (DDE), is used modeling machining operation. Stability analysis of DDE denotes the stable and unstable area between spindle speed and cutting depth of machining situation. This paper presents full-discretization method (FDM) to analyze stability for delayed periodic Mathieu Equation. Stability lobes are constructed for DPME with different time-period/time-delay ratios
Complex Equipment FMECA Method and Application Based on the Product Family
Authors: Qiu Yan Lin , Wang Zhi Yu , Cui Quan Hui
Published: August 2013

The Failure Mode, Effects and Criticality Analysis of the complicated equipment is difficult to implement. Therefore, this paper puts forward a product family FMECA method based on the analysis process and analysis. At the same time, the application of the fuzzy set and evidence theory are applied in the product family partition algorithm, which considering the complex equipment development early RMS attribute value fuzzy, uncertainty and the non-quantitative and other characters. Besides the method of effective application support complicated equipment based on the product platform of fault information database building methods is given in this paper.
Fabrication of Micro Cylindrical Electrode with Flat End Shape and its Application in Electrochemical Micromachining
Authors: Liu Yong
Published: August 2013

Electrochemical micromachining (EMM) has become more and more important in micro machining in recent years. Micro electrode as the tool of EMM is an essential cell in the machining process. In this study, micro cylindrical electrode is fabricated by electrochemical etching firstly. Second, the flat end shape forming methods for micro cylindrical electrode is investigated. And then, micro electrodes with flat end shape fabricated above is used in electrochemical micro milling process. Finally, a 3D micro structure with three steps is machined on metallic materials by above micro cylindrical electrode with flat end shape.
The Position Plane Distortion Study of 2-DOF Precision Position Table
Authors: Feng Xiao Mei , Li Li Shun , Liu Zhan Dong , Zhang Da Wei
Published: August 2013

A new 2-DOF precision positioning table of high speed and accuracy, directly driven by voice coil actuator, is put forward. And a novel elastic decoupling mechanism is introduced in the table. In order to study its dynamic characteristic when the table works at high speed and high acceleration, the table FEA model is built and the FEA is carried out. Based on the FEA results, the position planes displacement on X, Y and Z axis of the 2-DOF table is simulated respectively, the simulation results can provide reference for the table dynamic structural design.
Research and Design of Simple Numerical Control System of Valve Block Processing
Authors: Zhou En Tao , Lin Jun Zhe , Tao Lin , Chen Xiao Liang , Song Chen
Published: August 2013

During the design and manufacture of hydraulic system, valve block of processing is time-consuming and labor-intensive, and its easy to make a mistake. In this paper, a simple numerical control system based on PLC control to solve the practical engineering problem is studied. An automatic positioning based on parameters of holes which are drawn by AutoCAD and an automatic machining of holes can be realized by the control system. Its also discussed that the method and process of the design of software and hardware.
Analysis and Restraining of Electro-Magnetic Interference for Thyristor Based DC Motor Drives
Authors: Huang Hai Ming , Zhang Zuo Jiang , Chou Wu Sheng
Published: August 2013

A high-power DC motor drive with low electromagnetic interference (EMI) is needed for the nondestructive testing (NDT) robot in the nuclear industry environment. This paper focuses on the test and analysis of EMI for thyristor based DC motor control system, which can work in four quadrants to drive the NDT robot. The experimental tests of EMI are conducted with different factors, such as position, power supply mode, inductance of the smoothing reactor, motor load, and so on. The methods to restrain the EMI are researched and applied in the system. The experiments demonstrate that EMI of the DC motor drive is lower compared with the motor drive using PWM mode, and the drive can fully meet the need of the NDT robot.
Design and Simulation Analysis of the Manipulator Used to Feed Gems
Authors: Deng Xiao Lin , Wei Heng Bing
Published: August 2013

This paper studies and designs the gems feeding manipulator, makes a detailed analysis of the overall structure and working principle of the manipulator, and establishes the three-dimensional model of the manipulator. The virtual prototype model of the manipulator is built in ADAMS software. Use simulation analysis functions of ADAMS to carry out kinematics and dynamics simulation analysis on manipulator, obtaining parameter curves of the manipulator such as position, speed and torque, which verifies it feasible to use manipulator to unload and load gems, achieving the design requirements.