Steel-concrete composite floor systems with different structural and loading configurations under a corner column removal scenario: Experimental tests

2021 ◽  
Vol 244 ◽  
pp. 112736
Author(s):  
Qiu Ni Fu ◽  
Kang-Hai Tan
Keyword(s):  
Experimental Tests ◽  
Column Removal ◽  
Floor Systems ◽  
Column Removal Scenario

A mechanical model of composite floor systems under an internal column removal scenario

2018 ◽  
Vol 175 ◽  
pp. 50-62 ◽  
Author(s):  
Qiu Ni Fu ◽  
Kang Hai Tan ◽  
Xu Hong Zhou ◽  
Bo Yang
Keyword(s):  
Mechanical Model ◽  
Column Removal ◽  
Floor Systems ◽  
Column Removal Scenario

scholarly journals Numerical study on steel-concrete composite floor systems under corner column removal scenario

2018 ◽  
Author(s):  
Qiu Ni Fu ◽  
Kang Hai Tan
Keyword(s):  
Load Transfer ◽  
Numerical Study ◽  
Displacement Curve ◽  
Fe Model ◽  
Peak Displacement ◽  
Static Responses ◽  
Column Removal ◽  
Floor Systems ◽  
Versus Peak ◽  
Column Removal Scenario

This paper evaluates the robustness of steel-concrete composite floor systems subjected to Corner Column (CC) removal scenario based on numerical simulations. Firstly, a FE model is statically analysed subjected to a CC removal scenario, yielding the static load-displacement curve, the failure mode and load-transfer mechanisms. These results are compared with those of composite floor systems under an Internal Column (IC) removal scenario. Besides, the FE model was dynamically analysed by six times under the respective six levels of loads by suddenly removing the corner column. The dynamic displacement-time responses under all levels of loads were obtained. Six pairs of load versus peak displacement constitute the pseudo-static response, to assess the load-carrying capacity and ductility of this composite floor system subjected to a sudden corner-column-removal scenario. Lastly, dynamic increase factors (DIFs) are obtained through comparing the quasi-static and pseudo-static responses, which is further compared with DIF under IC scenario.

Load-resisting mechanisms of 3D composite floor systems under internal column-removal scenario

2017 ◽  
Vol 148 ◽  
pp. 357-372 ◽  
Author(s):  
Qiu Ni Fu ◽  
Kang Hai Tan ◽  
Xu Hong Zhou ◽  
Bo Yang
Keyword(s):  
Column Removal ◽  
Floor Systems ◽  
3D Composite ◽  
Column Removal Scenario

Behaviour of Different Types of Steel Connections in Steel Frames against Progressive Collapse

2011 ◽  
Vol 374-377 ◽  
pp. 1330-1341
Author(s):  
Kang Hai Tan ◽  
Bo Yang
Keyword(s):  
Parametric Study ◽  
Progressive Collapse ◽  
Experimental Tests ◽  
Test Results ◽  
Large Rotation ◽  
Catenary Action ◽  
Column Removal ◽  
Different Types ◽  
Column Removal Scenario ◽  
Middle Column

Firstly, this paper presents an overview of DoD code [1] against progressive collapse and points out the shortcomings of the current design approaches. After that, seven experimental tests of common types of bolted steel beam-column joints under a middle-column removal scenario are presented. This study provides the behaviour and failure modes of different types of connections, including their resistances and rotational capacities in catenary action. The test results indicate that the web cleat connection has the best performance in the development of catenary action. The flush end plate, fin plate and top and seat with web angle (TSWA) connections could also deform in a ductile manner and develop catenary action prior to failure. Numerical simulations have also been conducted. Both static and explicit dynamic solvers were employed to overcome problems of non-convergence, contact, large deformation and fracture simulations. It is demonstrated that the finite element analyses give reasonable accuracy compared to the test results. In addition, an extensive parametric study was undertaken using these validated models to obtain the rotation capacities of various types of connections under catenary action. Finally, some practical design implications have been drawn up from the experimental tests and the parametric study. A new tying resistance expression is proposed to consider the effect of large rotation. If large rotation capacity is not considered in the design stage, the joints with poor rotation capacities would fail to achieve the design tying resistances. In addition, four new connection acceptance criteria of rotation capacities have been proposed to incorporate catenary action under a middle column removal scenario. The work shows that current acceptance criteria of rotation capacities for steel joints such as web cleat, fin plate, flush end plate and TSWA connections, are probably too conservative as they only consider pure flexural resistance.

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