Nonlinear Finite Element Analysis on Seismic Behavior of Concrete Filled Square Steel Tube Planar Frames

2011 ◽  
Vol 368-373 ◽  
pp. 2394-2397
Author(s):  
Xian Tie Wang ◽  
You Su Fu Ma ◽  
Gu Qiu Luo
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Load Ratio ◽  
Steel Tube ◽  
Horizontal Load ◽  
Stiffness Ratio ◽  
Load Bearing Capacity ◽  
Element Analysis ◽  
Axial Load Ratio ◽  
Square Steel Tube

This paper presents a nonlinear numerical analysis on the seismic behavior of concrete filled square steel tube (CFST) columns and steel beam planar frame with through bolt-endplate beam-column connection, by using the finite element analysis modeling with ABAQUS. Parametric studies were conducted to investigate the influence of axial load ratio and beam-to-column linear stiffness ratio on the seismic behavior of composite frames. The analysis results were in good agreement with the experiment results. The analysis results showed that CFST frame with through bolt-endplate beam-column connection had good seismic behavior. The increase of axial load ratio will degrade the horizontal load bearing capacity and increase the energy dissipation capability. The increase of beam-to-column linear stiffness ratio will increase the horizontal load bearing capacity and degrade the energy dissipation capability.

Experimental study on the cyclic behavior of ultra high performance concrete–filled steel tube beam-columns

2019 ◽  
Vol 23 (5) ◽  
pp. 969-978
Author(s):  
Jian-gang Wei ◽  
Jun Zhou ◽  
Jiang-nan Huang ◽  
Hui-hui Yuan ◽  
Qing-wei Huang
Keyword(s):  
Axial Load ◽  
High Performance ◽  
High Performance Concrete ◽  
Load Ratio ◽  
Steel Tube ◽  
Cyclic Behavior ◽  
Ultra High Performance Concrete ◽  
Concrete Filled Steel Tube ◽  
Beam Columns ◽  
Axial Load Ratio

This article experimentally investigates the cyclic behavior of ultra high performance concrete–filled steel tube beam-columns. A total of eight specimens were tested. The considered parameters were the axial load ratio and steel ratio. The results showed that all ultra high performance concrete–filled steel tube beam-columns had a very good cyclic behavior without significant pinching. Increasing the axial load ratio results in the decrease of strength and ductility, but it has no obvious influence on the initial flexural stiffness. Reducing the steel ratio results in the decrease of the strength, stiffness and ductility, and energy dissipation capacity.

scholarly journals Numerical analysis of seismic behavior of square concrete filled steel tubular columns

2021 ◽  
Vol 15 (2) ◽  
pp. 127-140
Author(s):  
Hao Dinh Phan
Keyword(s):  
Numerical Analysis ◽  
Axial Load ◽  
Seismic Behavior ◽  
Concrete Strength ◽  
Steel Tube ◽  
Load Level ◽  
Deformation Capacity ◽  
Element Analysis ◽  
Fea Model ◽  
Cfst Columns

This paper presents a numerical analysis of the seismic behavior of square concrete filled steel tubular (CFST) columns. Finite element analysis (FEA) models in ABAQUS software were used to simulate a series of columns subjected to axial compression and cyclic lateral loading. The CFST columns were simulated using nonlinear tri-dimensional (3-D) finite elements for the infilled concrete, and nonlinear two-dimensional (2-D) finite elements for the steel tube. The feasibility of the FEA model has been validated by published experimental results. The validated FEA model was further extended to conduct parametric studies with various parameters including axial load level (n), width-to-thickness ratio of steel tube (B/t), and concrete strength. The numerical analysis results reveal that with the same B/t and constitute materials, the higher the axial compression, the lower the shear strength and deformation capacity were. The thicker steel wall (B/t = 21) resulted in higher strength and larger deformation capacity of the column. Increasing concrete strength helped to significantly develop the column’s shear strength in all cases. Meanwhile, it just led to an increase in deformation capacity in some cases depending on n and B/t. This study also reveals that the square CFST columns with B/t of 21 satisfy the seismic performance demand in high seismic zones (ultimate interstory drift ratio (IDRu) not less than 3% radian) under the two axial load levels, 0.35 and 0.45, but the columns with B/t of 28 satisfy the above demand under just one axial load level of 0.35. Keywords: square concrete filled steel tubular (CFST) columns; finite element analysis (FEA) model; width-to-thickness ratio (B/t); high axial load level; seismic behavior.

Finite Element Analysis of Prestressed Concrete-Filled Square Steel Tube Truss

2013 ◽  
Vol 838-841 ◽  
pp. 510-513
Author(s):  
Chun Li Zhou ◽  
Ru Yang ◽  
Xue Ying Tang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Steel Tube ◽  
Load Bearing Capacity ◽  
Element Analysis ◽  
Design Strength ◽  
Load Bearing ◽  
Square Steel Tube

Prestressed concrete-filled square steel tube truss is the kind of truss whose upper chords and lower chords are respectively concrete-filled square steel tube and prestressed square steel tube. Four truss models as square steel tube truss, concrete-filled square steel tube truss, prestressed square steel tube truss and prestressed concrete-filled square steel tube truss were analysed by ANSYS, each of those truss models’ span has three variations. The result shows that the bar sections’ strength of square steel tube truss and concrete-filled square steel tube truss are far from reaching their design strength when the allowable values of deflection has reachedl//400. Unlike the cases described above, when the bar sections’ strength of prestressed square steel tube truss and prestressed concrete-filled square steel tube truss has reached their design strength, their load-bearing capacity is 1 or 1.5 times higher than those cases above and their deflection has not reached the allowable values.

Review on Seismic Behavior of RC Columns

2013 ◽  
Vol 353-356 ◽  
pp. 2092-2096
Author(s):  
Yong Ping Xie ◽  
Lei Jia ◽  
Gang Sun
Keyword(s):  
Axial Load ◽  
Seismic Behavior ◽  
Large Scale ◽  
Load Ratio ◽  
Concrete Columns ◽  
Shear Capacity ◽  
Economic Damage ◽  
Rc Columns ◽  
Axial Load Ratio ◽  
Mode Of Failure

Column is the key member of the seismic structures, after the earthquake destroyed, not only cause column serious economic damage, and will cause a large number of casualties. For studying the seismic behavior and size effect of full-scale reinforced concrete columns. A comprehensive summary of the experimental results is undertaken to evaluate the seismic behavior of RC concrete columns, including test equipment and load method and mode of failure and Seismic behavior. It is concluded that the ductility and shear capacity of RC mainly depends on shear span ratio, axial load ratio and stirrup ratio. But the seismic behavior of large scale RC columns has no systematic studied.

Parametric Analysis on Seismic Behavior of Connections to Concrete-Filled Square Steel Tubular Columns with Three Edges Welded Interior Diaphragm

2010 ◽  
Vol 163-167 ◽  
pp. 562-566 ◽  
Author(s):  
Ya Ming Xiao ◽  
Ting Zhang
Keyword(s):  
Finite Element ◽  
Axial Load ◽  
Parametric Analysis ◽  
Seismic Behavior ◽  
Great Influence ◽  
Load Ratio ◽  
Steel Beam ◽  
Finite Element Models ◽  
Tubular Columns ◽  
Axial Load Ratio

In order to further understand the seismic behavior of connections to concrete-filled square steel tubular columns with three edges welded interior diaphragm, basic sample and corresponding finite element models are constructed and analyzed according to criterion; furthermore influences on seismic behavior of such connections from many factors such as axial load ratio, height of steel beam, strength of steel beam and interior diaphragm and so on are studied. Results show that the base sample has excellent seismic behavior; such factors as axial load ratio, height of steel beam, strength of steel beam and interior diaphragm have great influence on seismic behavior. Therefore, the feasibility of such connections at edge columns and corner columns is further validated.

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