半尺度七層樓RC 結構受扭轉不規則之3D 有限元素非線性分析研究

In view of the recent earthquake damage caused by the 921 Chi-Chi Earthquake and the 2016 Meinong Earthquake, reinforced concrete structures in Taiwan are vulnerable to eccentric and irregular torsional damage. Therefore, experts and scholars are devoted to the analysis and simulation of the collapse resistance of the structures with torsional irregularity, and a series of half-scale seven-story reinforced concrete structures with different sources of irregularities were tested on the shaking-table at the National Earthquake Engineering Research Center (NCREE) Tainan laboratory. It is expected that the nonlinear torsional response of the reinforced concrete structures can be experimentally studied. This study aims to investigate the nonlinear torsional behavior of existing reinforced concrete buildings under seismic motion through the shaking-table tests performed by NCREE and emphasizes the characteristics of the weak firststory system. The finite element software "ABAQUS" is used for dynamic analysis. Detailed discusses on how to establish an appropriate analysis model to effectively simulate its stiffness, plastic behavior of concrete, failure mode and nonlinear torsional response are given. Then the numerical simulations of the dynamic behavior of the structure are compared with the experimental data provided by NCREE to discuss the accuracy of the analysis for nonlinear torsion. Finally, conclusions and suggestions for future research are given.