Experimental Research on Seismic Behavior of Exterior Frame Joints with T-Shaped CFST Column and Steel Beam

2011 ◽  
Vol 368-373 ◽  
pp. 183-188 ◽  
Author(s):  
Guo Feng Du ◽  
Chao Ma ◽  
Cheng Xiang Xu
Keyword(s):  
Cyclic Loading ◽  
Cross Section ◽  
Seismic Behavior ◽  
Mechanical Performance ◽  
Steel Beam ◽  
Working Mechanism ◽  
Axial Compression Ratio ◽  
Hysteretic Performance ◽  
Energy Dissipation Capacity ◽  
Design Requirements

In order to understand the mechanical performance and related tectonic design requirements of the concrete-filled steel tubular joints with special-shaped cross-section , three T-shaped concrete filled steel tubular column joints with exterior diaphragms were manufactured and experimented under cyclic loading. By changing the axial compression ratio of the columns and increasing the width and overhanging length of the stiffening ring, the hysteretic performance and working mechanism of such joints under cyclic loading were studied. The results show that by increasing the width and overhanging length of the stiffening ring, the hysteretic performance, ductility and energy dissipation capacity of joints were obviously improved.

Research on the Joint of Concrete-Filled Steel Tubular Column and Steel Beam

2013 ◽  
Vol 351-352 ◽  
pp. 174-178
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Failure Mechanism ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Strength Degradation ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity

With the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: when reached the ultimate strength, the strength degradation and stiffness degradation of joints are slowly and the ductility is also good, the energy dissipation capacity of joints is much better.

Study on Seismic Behavior of Joint with Exterior Diaphragms between Concrete-Filled Square Steel Tubular Column and H-Type Steel Beam

2014 ◽  
Vol 578-579 ◽  
pp. 805-809
Author(s):  
Nan Li
Keyword(s):  
Cyclic Loading ◽  
Seismic Design ◽  
Seismic Behavior ◽  
Failure Criteria ◽  
Steel Beam ◽  
Equivalent Viscous Damping ◽  
Type Steel ◽  
Study Results ◽  
Energy Dissipation Capacity ◽  
Current Code

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.

Research on the Seismic Behavior of Concrete-Filled Steel Tubular Column and Steel Beam Joint

2012 ◽  
Vol 204-208 ◽  
pp. 2528-2532
Author(s):  
Ying Zi Yin ◽  
Yan Zhang
Keyword(s):  
Energy Dissipation ◽  
Compression Ratio ◽  
Seismic Behavior ◽  
Steel Beam ◽  
Failure Characteristics ◽  
Static Test ◽  
Axial Compression Ratio ◽  
Earthquake Action ◽  
Energy Dissipation Capacity ◽  
Strength And Stiffness

Joints are the forces cross points of members, and the bearing modes are more complex than other members, especially under earthquake action, so the rationality of joints are directly related to the safe reliability of structure. By the pseudo-static test of 4 concrete-filled square steel tubular column and steel beam joint with outer stiffened ring, this paper discusses the failure characteristics, failure mechanism and seismic behavior of joints under different axial compression ratio. The analysis of the testing results shows: the energy dissipation capacity of joints is much better, the degradation of strength and stiffness are slowly when reached the ultimate strength, and the ductility is also good.

The seismic performance of precast short-leg shear wall under cyclic loading

2020 ◽  
pp. 136943322096372
Author(s):  
Xiuli Du ◽  
Min Wu ◽  
Hongtao Liu
Keyword(s):  
Energy Consumption ◽  
Cyclic Loading ◽  
Axial Compression ◽  
Seismic Performance ◽  
Compression Ratio ◽  
Structural Parameters ◽  
Shear Wall ◽  
Shear Capacity ◽  
Axial Compression Ratio ◽  
Hysteretic Performance

In order to study the seismic performance of precast short-leg shear wall connected by grouting sleeves (PSSW), the three-dimensional numerical model was established by using the experiment of PSSW subjected to low cyclic loading. Based on good agreement between numerical results and experimental results, the numerical analysis models with different structural parameters of axial compression ratio and splicing position were designed in detail, and the effects of various parameters on the seismic performance of PSSW were analyzed. The results show that the PSSW exhibits wide and stable hysteresis loops, indicating a satisfactory hysteretic performance and an excellent energy consumption capacity. With the increase of the axial compression ratio, the shear capacity of horizontal splice seam is improved, but the ductility coefficient and total energy consumption decrease obviously. The most disadvantageous position of PSSW can be effectively avoided by changing the position of the post pouring seam. The bearing capacity of the specimens is basically stable, and the energy consumption increases significantly, so the post pouring seam of precast wall is recommended to be far away from the bottom section of the wall. In addition, the failure mechanism of different splicing positions was analyzed in detail.

Experimental Research on Seismic Behavior of New Joint between Concrete-Filled Square Steel Tubular Column and Steel Beam

2014 ◽  
Vol 638-640 ◽  
pp. 1923-1927
Author(s):  
Nan Li ◽  
Ya Jun Xi
Keyword(s):  
Seismic Design ◽  
Seismic Behavior ◽  
Seismic Energy ◽  
Steel Tube ◽  
Steel Beam ◽  
Equivalent Viscous Damping ◽  
New Type ◽  
Energy Dissipation Capacity ◽  
Square Steel Tube ◽  
Reversed Cyclic

A new type of joint between Concrete-filled Square Steel Tube columns and steel beam is proposed in this paper, and the seismic behavior of this type of joint under low-reversed cyclic loading experiment is researched. Ductility behavior, dissipation of seismic energy of this joint under horizontal, repeat load are analyzed. The experimental results showed that all specimens have good ductility and energy dissipation capacity. The story angle drift ductility ratios are μ=3.23~3.63, and the equivalent viscous damping coefficients are he=0.25~0.35,which meet the needs of the code for seismic design of building.

Experimental Study on the Seismic Behavior of SRHSC Columns

2011 ◽  
Vol 243-249 ◽  
pp. 366-369 ◽  
Author(s):  
Shan Suo Zheng ◽  
Qing Lin Tao ◽  
Yi Hu ◽  
Lei Li ◽  
Zhi Qiang Li
Keyword(s):  
High Strength Concrete ◽  
Seismic Behavior ◽  
Concrete Strength ◽  
High Strength ◽  
Relationship Strength ◽  
Composite Columns ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity ◽  
Strength And Stiffness ◽  
Ductility Capacity

Based on the experiments of 4 SRHSC (steel reinforced high strength concrete) column specimens, which were different in concrete strength, axial compression ratio and spacing of hoop reinforcement, this paper investigates the seismic behavior and flexural strength of SRHSC columns under cyclic lateral loading which is controlled by the displacement. According to the date and phenomenon of experiment, adopting existed theory and foreign codes for composite columns, the failure mode, lateral load-deflection relationship, strength and stiffness deterioration, ductility capacity and energy dissipation capacity of SRHSC columns is analyzed.

A Study on Parameters Affect Seismic Behavior of Reinforced Concrete Specially Shaped Columns

2010 ◽  
Vol 163-167 ◽  
pp. 1300-1306
Author(s):  
Pu Yang ◽  
Jing Tang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Cross Section ◽  
Seismic Behavior ◽  
Analytical Study ◽  
Longitudinal Reinforcement ◽  
Strength Capacity ◽  
Energy Dissipation Capacity

Using flexibility-based finite element method based on fiber model, several experiments of reinforced concrete specially shaped columns under cyclic loading which cross section is ‘L’, ‘T’ and ‘+’ shape with different longitudinal reinforcement and hoop reinforcement have been simulated, and the seismic behavior of columns such as strength, ductility and energy dissipation are analyzed. Results from the analytical study indicate that: 1) ductility of the column increases as quantity of hoop reinforcement increases. 2) strength capacity of the column increase linearly as ratio of longitudinal reinforcement increase, but is not seriously affected by hoop reinforcement; 3) energy dissipation capacity of the column is not significantly affected by hoop and longitudinal reinforcement, particularly in slightly nonlinear range.

scholarly journals Numerical Analysis of Seismic Performances of Post-Fire Scoria Aggregate Concrete Beam-Column Joints

Fire ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 70
Author(s):  
Bin Cai ◽  
Wen-Li Hu ◽  
Feng Fu
Keyword(s):  
Heat Transfer ◽  
Seismic Behavior ◽  
Seismic Analysis ◽  
Reinforcement Ratio ◽  
Heat Transfer Analysis ◽  
Longitudinal Reinforcement ◽  
Aggregate Concrete ◽  
Axial Compression Ratio ◽  
Energy Dissipation Capacity ◽  
Simulation Results

In order to analyze the post-fire seismic performances of scoria aggregate concrete (SAC) beam-column joints precisely and effectively, one finite element model (FEM) was developed to simulate the seismic behavior of SAC beam-column joints. The FEM consists of two sequential parts: firstly, the heat transfer analysis of the beam-column joints, and then the seismic analysis of the SAC joints by combining the temperature field distribution obtained from the heat transfer analysis with the mechanical properties of the SAC after fire, both of which were implemented in ABAQUS. In order to make the simulation results more accurate, spring elements were applied to simulate the bond–slip behavior with material degradation due to fire damage in the simulation of seismic analysis. Moreover, in order to validate the FEM, the seismic behavior of the natural aggregate concrete (NAC) beam-column joints after fire was simulated with the established FEM, and the simulation results were compared with the available test data. It is proved that the FEM we built was accurate and effective and provided efficient solutions for evaluating the seismic performance of post-fire beam-column joints so that the effects of various parameters, namely, fire time, longitudinal reinforcement ratio, and axial compression ratio on the seismic performance of SAC beam-column joints after fire were investigated in depth, which indicated the increase of axial compression ratio can improve the strength, initial stiffness, and energy dissipation capacity of SAC joints, while the increase of longitudinal reinforcement ratio can increase the strength and stiffness of SAC joints to a small extent, but too high reinforcement ratio will significantly weaken the energy dissipation capacity of SAC joints.

Numerical Simulation of Joint between Concrete-Filled Square Steel Tubular Column and Steel Beam on Seismic Behavior

2015 ◽  
Vol 744-746 ◽  
pp. 207-210
Author(s):  
Nan Li ◽  
Dong Ning Zhang
Keyword(s):  
Numerical Simulation ◽  
Cyclic Loading ◽  
Seismic Behavior ◽  
Failure Criteria ◽  
Steel Tube ◽  
Steel Beam ◽  
Finite Element Program ◽  
Element Program ◽  
Square Steel Tube ◽  
Reversed Cyclic

A type of joint between Concrete-filled Square Steel Tube columns and steel beam is proposed in this paper, Based on joint experiment, appropriate material stress-strain relations and failure criteria are proposed, numerical simulation by finite element program is conducted under monotonic and cyclic loading and the seismic behavior of the joints under low-reversed cyclic loading is researched. Through the data contrast, it is proved that this type of joint has nice seismic behavior.

Effect of Stirrup Ratio on Seismic Behavior of Cross-Shaped Columns with HRB500 Reinforcement

2012 ◽  
Vol 166-169 ◽  
pp. 2605-2608
Author(s):  
Yan Yan Li ◽  
Xian Rong ◽  
Jian Xin Zhang
Keyword(s):  
Cyclic Loading ◽  
Great Improvement ◽  
Seismic Behavior ◽  
Displacement Ductility ◽  
Accumulated Damage ◽  
Hysteretic Performance ◽  
Result Show ◽  
Low Cyclic Loading ◽  
Load Displacement ◽  
Damage Characteristic

Three cross-shaped columns were tested under low cyclic loading in order to research the effect of stirrup ratio on seismic behavior of cross-shaped columns with HRB500 reinforcement. The damage characteristic, hysteretic curve, load, displacement, ductility and accumulated damage were analyzed. The result show the damage characteristic is improved, the hysteretic performance has great improvement and the ductility of cross-shaped columns is enhanced with the increase of volume stirrup ratio. Besides, the degree of accumulated damage of specially shaped columns with HRB500 reinforcement can also be lighten.

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