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Nonlinear finite element analysis of high-strength concrete columns and experimental verification

LU Xilin (ÂÀÎ÷ÁÖ)¹ and Chen Shaolin (³ÂÉÜÁÕ)²

1. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
2. Architectural Design Research Institute of Tongji University, Tongji University, Shanghai 200092, China
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Abstract: This paper describes a nonlinear finite element (FE) analysis of high strength concrete (HSC) columns, and verifies the results through laboratory experiments. First, a cyclically lateral loading test on nine cantilever column specimens of HSC is described and a numerical simulation is presented to verify the adopted FE models. Next, based on the FE model for specimen No.6, numerical simulations for 70 cases, in which different concrete strengths, stirrup ratios and axial load ratios are considered, are presented to explore the effect of these parameters on the behavior of the HSC columns, and to check the rationality of requirements for these columns specified in the China Code for Seismic Design of Buildings (GB 50011-2001). In addition, three cases with different stirrup strengths are analyzed to investigate their effect on the behavior of HSC columns. Finally, based on the numerical results some conclusions are presented.

Keywords: rhigh-strength concrete column; DIANA; bond-slip; balanced axial load ratio; stirrup ratio