RESEARCH ARTICLE


Parametric Analysis on Collapse-resistance Performance of Reinforced-concrete Frame with Specially Shaped Columns Under Loss of a Corner Column



Lei Zhang1, Hailong Zhao1, 2, *, Tiecheng Wang1, 2, Qingwei Chen1
1 School of Civil Engineering, Tianjin University, Tianjin, P.R. China
2 Key Laboratory of Coast Civil Structures, Tianjin University, Ministry of Education, Tianjin, P.R. China


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Creative Commons License
© Zhang et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at School of Civil Engineering, Tianjin University, 300072, Tianjin, P.R. China; Tel: (+86) 13821290260; E-mails: hgdtdkimi@163.com, zhao_hailong@126.com


Abstract

A finite element model is verified accurate enough to simulate the static test of one reinforced-concrete frame with specially shaped columns subjected to the loss of a ground corner column. As the frame sustained loads primarily depending on the beam resisting mechanism in the test, four related parameters, namely the height of beam section, rebar ratio of beam, rebar ratio of slab and limb length of specially shaped column are chosen for parametric analyses respectively. It is indicated that the collapse-resistance capacity remarkably increases with the increasing of the height of beam section and rebar ratio of the lower steel bars of beam. The increase of the rebar ratio of slab and upper steel bars of beam could enhance the stiffness and collapse-resistance capacity slightly. The lengthening of the limb of specially shaped column only increases the stiffness of the frame. According to an equivalent method, the rectangular column frame is obtained to compare collapse-resistance performance with the specially shaped column frame. It is concluded that the frame with specially shaped columns could maintain the equivalent collapse-resistance capacity while reduce the lateral stiffness compared with the rectangular column frame.

Keywords: Alternate path analysis, Column failure, Nonlinear analysis, Parametric analysis, Progressive collapse and specially shaped column.