Experimental Study on Hysteretic Behavior of Circular Concrete-Filled Steel Bridge Piers

2012 ◽  
Vol 256-259 ◽  
pp. 1640-1647
Author(s):  
Dong Sheng Zhu ◽  
Biao Pang
Keyword(s):  
Large Scale ◽  
Axial Strain ◽  
Constitutive Models ◽  
Steel Tube ◽  
Hysteretic Behavior ◽  
Bridge Piers ◽  
Steel Bridge ◽  
Skeleton Curve ◽  
Cyclic Lateral Load ◽  
Force Displacement

The seismic behavior of concrete-filled circular steel bridge piers was studied by testing four large scale models which were subjected to a constant axial load in addition to a cyclic lateral load. It was found that concrete-filled circular steel bridge piers had high ductility and energy dissipation capacity. Based on the hysteretic force-displacement, the hysteretic behavior of strength reduction was analyzed. Based on the axial strain and the circumferential strain, the plastic area and the strain feature of steel tube were analyzed. According to two different constitutive models of concrete-filled steel tube, the skeleton curve of moment-curvature and force-displacement were calculated and compared with testing data.

Experimental Study on Seismic Performance of AAS-CFST Column

2014 ◽  
Vol 670-671 ◽  
pp. 344-348 ◽  
Author(s):  
Wen Feng Chen ◽  
Xiao Hui Yuan ◽  
Bin Li
Keyword(s):  
Axial Compression ◽  
Seismic Performance ◽  
Compression Ratio ◽  
Deformation Mode ◽  
Steel Tube ◽  
Hysteretic Behavior ◽  
Initial Stiffness ◽  
Skeleton Curve ◽  
Smooth Test ◽  
Axial Compression Ratio

Three model specimens of alkali-activated slag concrete filled steel tube (AAS-CFST) with different axial compression ratio and steel ratio were designed and tested in the present study. The seismic performance of the structures were evaluated by testing them with combined lateral constant compression and vertical cyclic loads. The structural performance, such as the testing observations, hysteretic behavior, skeleton curve, stiffness degradation, energy dissipation capacity and ductility performance was discussed in detailed. The results show that all the specimens’ damage were bending deformation mode, and the hysteretic curves are relatively smooth. Test data indicated that increased the axial compression ratio improved the load bearing capacity, initial stiffness.

Leveraging the Equivalence of Hysteresis Models From Different Fields for Analysis and Numerical Simulation of Jointed Structures

2008 ◽  
Vol 3 (3) ◽  
Author(s):  
T. J. Royston
Keyword(s):  
Large Scale ◽  
Structural Model ◽  
Constitutive Models ◽  
Hysteretic Behavior ◽  
Joint Interface ◽  
Element Analysis ◽  
Wide Range ◽  
Joint Dynamics ◽  
Analytical Tools ◽  
The Relationship

An important problem that spans across many types of systems (e.g., mechanical and biological) is how to model the dynamics of joints or interfaces in built-up structures in such a way that the complex dynamic and energy-dissipative behavior that depends on microscale phenomena at the joint/interface is accurately captured, yet in a framework that is amenable to efficient computational analyses of the larger macroscale system of which the joint or interface is a (spatially) small part. Simulating joint behavior in finite element analysis by meshing the joint regions finely enough to capture relevant micromechanics is impractical for large-scale structural systems. A more practical approach is to devise constitutive models for the overall behavior of individual joints that accurately capture their nonlinear and energy-dissipative behavior and to locally incorporate the constitutive response into the otherwise often-linear structural model. Recent studies have successfully captured and simulated mechanical joint dynamics using computationally simple phenomenological models of combined elasticity and slip with associated friction and energy dissipation, known as Iwan models. In the present article, the author reviews the relationship, and in some cases equivalence, of one type of Iwan model to several other models of hysteretic behavior that have been used to simulate a wide range of physical phenomena. Specifically, it is shown that the “parallel-series” Iwan model has been referred to in other fields by different names, including “Maxwell resistive capacitor,” “Ishlinskii,” and “ordinary stop hysteron.” Given this, the author establishes the relationship of this Iwan model to several other hysteresis models, most significantly the classical Preisach model. Having established these relationships, it is then possible to extend analytical tools developed for a specific hysteresis model to all of the models with which it is related. Such analytical tools include experimental identification, inversion, and analysis of vibratory energy flow and dissipation. Numerical case studies of simple systems that include an Iwan-modeled joint illustrate these points.

scholarly journals Hysteretic Behavior of Inverted L-Shaped Steel Bridge Piers Subjected to Out-of-Plane Cyclic Loading.

2002 ◽  
pp. 215-224 ◽  
Author(s):  
Tatsuro SAKIMOTO ◽  
Masafumi NAKAYAMA ◽  
Tomoaki KAWABATA ◽  
Hiroshi WATANABE ◽  
Eiichi EYAMA
Keyword(s):  
Cyclic Loading ◽  
Hysteretic Behavior ◽  
Bridge Piers ◽  
Steel Bridge ◽  
Out Of Plane

scholarly journals HYSTERETIC BEHAVIOR OF INVERTED L-SHAPED STEEL BRIDGE PIERS FILLED WITH CONCRETE

2003 ◽  
pp. 55-66
Author(s):  
Tatsuro SAKIMOTO ◽  
Koshiro TAKATA ◽  
Hideaki MATSUMOTO ◽  
Takenori HIROTA ◽  
Hiroshi WATANABE
Keyword(s):  
Hysteretic Behavior ◽  
Bridge Piers ◽  
Steel Bridge

scholarly journals Hysteretic Behavior on Asymmetrical Composite Joints with Concrete-Filled Steel Tube Columns and Unequal High Steel Beams

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2381
Author(s):  
Jing Ji ◽  
Wen Zeng ◽  
Liangqin Jiang ◽  
Wen Bai ◽  
Hongguo Ren ◽  
...  
Keyword(s):  
Peak Load ◽  
Constitutive Models ◽  
Steel Tube ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Steel Beams ◽  
Composite Joints ◽  
Statistical Regression ◽  
Concrete Filled Steel Tube ◽  
Composite Joint

In order to acquire the hysteretic behavior of the asymmetrical composite joints with concrete-filled steel tube (CFST) columns and unequal high steel beams, 36 full-scale composite joints were designed, and the CFST hoop coefficient (ξ), axial compression ratio (n0), concrete cube compressive strength (fcuk), steel tube strength (fyk), beam, and column section size were taken as the main control parameters. Based on nonlinear constitutive models of concrete and the double broken-line stress-hardening constitutive model of steel, and by introducing the symmetric contact element and multi-point constraint (MPC), reduced-scale composite joints were simulated by ABAQUS software. By comparing with the test curves, the rationality of the modeling method was verified. The influence of various parameters on the seismic performance of the full-scale asymmetrical composite joints was investigated. The results show that with the increasing of fcuk, the peak load (Pmax) and ductility of the specimens gradually increased. With the increasing of n0, the Pmax of the specimens gradually increases firstly and then gradually decreases after reaching a peak point. The composite joints have good energy dissipation capacity and the characteristic of stiffness degradation. The oblique struts force mechanism in the full-scale asymmetrical composite joint domain is proposed. By introducing influence coefficients (ξ1 and ξ2), the expression of shear bearing capacity of composite joints is obtained by statistical regression, which can provide theoretical support for the seismic design of asymmetrical composite joints.

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