Study on the Seismic Behavior of Buckling Restrained Braced Steel Frames

2012 ◽  
Vol 446-449 ◽  
pp. 409-413 ◽  
Author(s):  
Guo Qi Liu ◽  
Jian Song
Keyword(s):  
Finite Element ◽  
Energy Consumption ◽  
Seismic Behavior ◽  
Steel Frames ◽  
Steel Frame ◽  
Main Structure ◽  
Finite Element Software ◽  
Suitable Solution

This paper presents a suitable solution of studying on the performance of energy consumption of BRB. The hysteretic curve of BRB is got with finite element software, and is lead into steel frame by virtual hinge. The results show that the BRB has more advantages in reducing the structural displacement and protecting the safety of the main structure compared with the general braces.

Seismic Behavior Analysis of Beam-Column Joints of Steel Structure Semirigid

2012 ◽  
Vol 166-169 ◽  
pp. 978-983
Author(s):  
Yanhui Ge ◽  
Guo Su
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Steel Structure ◽  
Steel Frame ◽  
Frame Structure ◽  
Finite Element Program ◽  
Finite Element Software ◽  
End Plate ◽  
Plate Connection ◽  
Steel Frame Structure

In order to study the seismic behavior of steel frame structure, based on the verification of the finite element program, two different end-plate connections under monotonic load and cyclic load are analysed with the finite-element software ANSYS, considering geometry, material and status nonlinearity. Some parameters such as height of endplate, array of blot, diameter of blot are analysed to study their effects on the seismic behavior of beam-to-column end-plate connection, the bearing capacity of the joint of the framework, the initial rotation stiffness, the ultimate turning power, power-wasting capacity and ductility. The results show that reasonable connection have better power-wasting capacity and ductility , so it can be applicated in multiple-story steel frame structure.

Analysis on Self-Centering Capacity of Prefabricated Frame Joints

2014 ◽  
Vol 580-583 ◽  
pp. 1471-1476
Author(s):  
Yun Zou ◽  
Hui Lin ◽  
Wei Qiang Ma
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
The Self ◽  
Finite Element Software ◽  
Analysis Models ◽  
Post Tensioned

In order to research the self-centering capacity of prefabricated frame joints, this paper designed analysis models of prefabricated frame joint with the finite element software ABAQUS, contrastively analyzed seismic behavior of joint applied pretention and joint without pretention. Joint applied pretention is found to have better self-centering capacity. Then the paper calculated and analyzed the factors of stretching control stress, number of post-tensioned steel. The results show that number of post-tensioned steel has a greater influence on the seismic behavior of the structure, and the stretching control stress has influence in a certain range. The results have some degree of guiding significance for the popularization of prefabricated frame.

Analyses in Seismic Responses of Different Types of Eccentrically Braced Steel Frames

2011 ◽  
Vol 243-249 ◽  
pp. 3737-3742
Author(s):  
Ying Hu ◽  
Jin Song Lei ◽  
Wen Xia Luo
Keyword(s):  
Seismic Wave ◽  
Seismic Behavior ◽  
Steel Frames ◽  
Time History ◽  
Finite Element Software ◽  
Type D ◽  
Type K ◽  
Single Frame ◽  
Different Types ◽  
Seismic Behaviors

In order to research the seismic behaviors of the eccentrically braced steel frames, used finite element software SAP2000 to build 20-storey single frame models with type D, K, and Y eccentrically braces, and did the seismic time history analyses to them. Comparisons were set between different kinds of braces in the distributions of moments, displacements, and accelerations for different layers produced by the EICENTRO seismic wave, TianJin seismic wave and NanJing seismic wave. Also, the analyses were set in the time history curves of displacements and accelerations. The results reveal that: type K is able to control the moments and displacements of the layers; while type Y is good at restricting the acceleration amplified effect, and the seismic behavior of type D is between the former two types.

Nonlinear Finite Element Analysis on the Steel Frame with Semi-Rigid Connection under Periodic Load

2011 ◽  
Vol 255-260 ◽  
pp. 614-618
Author(s):  
Lai Wang ◽  
Bo Shun Liu ◽  
Ning Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Finite Element Analysis ◽  
Steel Frame ◽  
Nonlinear Finite Element ◽  
Periodic Load ◽  
Element Analysis ◽  
Finite Element Software ◽  
Rigid Connection ◽  
Material Nonlinear

In this paper, nonlinear finite element analysis on the steel frame with top-seat angle and double web-angles semi-rigid connection were carried out with ANSYS finite element software. In the analysis, connective, geometrical and material nonlinear were considered. Compare analysis results with experimental results, the influence of semi-rigid connection’s flexibility on steel frame was studied and some references to the design of steel frame with semi-rigid connection were supplied.

Study on Finite Element Method for Simulating Seismic Behavior of New All-Bolted Semi-Rigid Connection

2013 ◽  
Vol 671-674 ◽  
pp. 1494-1497
Author(s):  
Xin Zhao ◽  
Mai Wu ◽  
Xiang Shang Chen ◽  
Guang Wei
Keyword(s):  
Finite Element ◽  
Seismic Behavior ◽  
Research Work ◽  
Steel Tube ◽  
General Purpose ◽  
Fe Model ◽  
Fe Method ◽  
Geometry Model ◽  
Finite Element Software ◽  
Rigid Connection

Using the APDL language of ANSYS which is the large general-purpose finite element software, the finite element (FE) model of new bolted beam-to-column connection for concrete-filled square steel tube (CFST) is established. The simulated analysis for the seismic behavior of the new semi-rigid connection under low-cycle reverse loading is carried out by the FE method. It is focus on the method study on establishing geometry model, selection of element and its parameter, setting up boundary restraint and solution during FE analysis. Through comparision it is found that the calculated values and the experimental results are very close, which verifies the correctness and rationality of the method in this paper. The research work provides fundamental basis for future intensive study on seismic behavior of the new connection.

Influence on Seismic Performance of Joints of Cellular Steel Column and Steel Beam due to the Opening Rate

2014 ◽  
Vol 578-579 ◽  
pp. 282-286
Author(s):  
Pi Yuan Xu ◽  
Zhang Lin Zhai ◽  
Ya Feng Xu
Keyword(s):  
Finite Element ◽  
Seismic Performance ◽  
Seismic Behavior ◽  
Element Model ◽  
Steel Beam ◽  
Finite Element Software ◽  
Invariant Moments ◽  
Element Simulation ◽  
Hole Position ◽  
Steel Column

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

Analysis of Residual Stresses Distribution Based on the Finite Element Method for Beam-Column Connections of Steel Frames

2011 ◽  
Vol 71-78 ◽  
pp. 4421-4424
Author(s):  
Guo Lin Xu ◽  
Wen Sheng Zhang ◽  
De Bin Zhu ◽  
Ya Shuang Bai
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Steel Frames ◽  
The Finite Element Method ◽  
Welding Seam ◽  
High Rise ◽  
Finite Element Software ◽  
Deformation Ability ◽  
Software Distribution ◽  
Peak Value

Beam-column connections of high-rise steel frames are usually welded, studies on seismic damages for nodes show that the existence of welding seam is the main reason which contributes to the brittle failure of nodes. This paper studies on the coming into being process of nodes, the deformation ability can be improved through changing welding order to reduce residual stresses for nodes. In the paper, numerical stimulations for nodes are conducted through finite element software. Distribution and peak value of residual stresses of beam-column connections are compared in accordance with different welding order. The analysis provides a theoretical basis for connection nodes in terms of utilizing their strength and ductility of steel.

scholarly journals Seismic Behavior of Superelastic Shape Memory Alloy Spring in Base Isolation System of Multi-Story Steel Frame

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 997 ◽  
Author(s):  
Yuping Liu ◽  
Hongyang Wang ◽  
Canxing Qiu ◽  
Xingnan Zhao
Keyword(s):  
Finite Element ◽  
Shape Memory ◽  
Earthquake Engineering ◽  
Seismic Behavior ◽  
Base Isolation ◽  
Residual Deformation ◽  
Steel Frame ◽  
Isolation System ◽  
Base Isolation System ◽  
Sma Spring

Owing to excellent re-centering capability and good damping behavior, superelastic shape memory alloys (SMAs) are emerging as a potential new material to enhance the seismic resilience of civil structures. This paper focuses on using base isolation with SMA device for isolated structures. SMA springs are deemed to be promising candidate as the damper in the base isolation system, due to the compact form, damping contribution, restoring capability and flexible stiffness. This paper reported the concept of an innovative spring which is made of superelastic SMA wire. Then cyclic loading tests were carried out to evaluate the interested cyclic properties. Parametric analyses based on finite element simulations were conducted to reveal the versatile performance of SMA springs. To further examine its seismic behavior in the base isolation system, the SMA spring was later installed at the isolation level of a multi-story steel frame, based on the finite element model built in the earthquake engineering simulation platform OpenSees. An ordinary elastic spring is included for comparison to highlight the features of SMA springs. Both isolated frames were subjected to real earthquakes. The comparisons indicated that using SMA spring is more effective in controlling maximum and residual deformation for the protected superstructures. Thus, this paper well demonstrated the feasibility and merits of using SMA springs in the isolated frames.

scholarly journals Analytical Benchmark Solutions for Steel Frame Structures Subject to Local Buckling Effects

2000 ◽  
Vol 3 (3) ◽  
pp. 215-229 ◽  
Author(s):  
Philip Avery ◽  
Mahen Mahendran
Keyword(s):  
Finite Element ◽  
Steel Frames ◽  
Local Buckling ◽  
Element Model ◽  
Steel Frame ◽  
Frame Structures ◽  
Steel Frame Structures ◽  
Advanced Analysis ◽  
Shell Finite Element ◽  
Benchmark Solutions

Application of “advanced analysis” methods suitable for non-linear analysis and design of steel frame structures permits direct and accurate determination of ultimate system strengths, without resort to simplified elastic methods of analysis and semi-empirical specification equations. However, the application of advanced analysis methods has previously been restricted to steel frames comprising only compact sections that are not influenced by the effects of local buckling. A research project has been conducted with the aim of developing concentrated plasticity methods suitable for practical advanced analysis of steel frame structures comprising non-compact sections. This paper contains a comprehensive set of analytical benchmark solutions for steel frames comprising non-compact sections, which can be used to verify the accuracy of simplified concentrated plasticity methods of advanced analysis. The analytical benchmark solutions were obtained using a distributed plasticity shell finite element model that explicitly accounts for the effects of gradual cross-sectional yielding, longitudinal spread of plasticity, initial geometric imperfections, residual stresses, and local buckling. A brief description and verification of the shell finite element model is provided in this paper.

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