Modeling and Its Application of Reinforced Concrete Columns Considering Nonlinear Shear Effects |
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| Authors: | Lei Tuo Qian Jiang and Liu Boquan |
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| Institution: | School of Civil Engineering, Chang'an University, Xi'an 710061, P. R. China;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, P. R. China;School of Civil Engineering, Chang'an University, Xi'an 710061, P. R. China |
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| Abstract: | A fiber beam-column element in conjunction with zero-length elements attached to its ends was proposed to simulate the flexural and shear mechanism respectively. Based on the Limit State Material model and the Shear Limit Curve model provided by OpenSees, the nonlinear shear effect of reinforced concrete column and its coupling with the flexural effect were defined. The reliability of the proposed model was validated by means of comparisons with existing test results. Finally, a plane frame from in-situ pushover test was simulated. It is shown that the proposed method, by taking the nonlinear shear effect into account, produces satisfactory results for frame columns with shear strength and stiffness degradation, while the conventional fiber beam-column element can hardly simulate actual flexure-shear failure mechanism for columns characterized by insufficient transverse reinforcement. The proposed method is applicable for nonlinear analysis of reinforced concrete frame structures with shear deficiencies. |
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| Keywords: | reinforced concrete column nonlinear flexure-shear failure |
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