使用3D动态非线性有限元对钢筋溷凝土建筑的抗震性能的绩效评估的分析研究.pdf

Vol.10, No.2 EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION June, 2011 Earthq Eng Eng Vib (2011) 10: 291-302 DOI: 10.1007/s11803-011-0066-0 Analytical study of performance evaluation for seismic retrofi tting of reinforced concrete building using 3D dynamic nonlinear fi nite element analysis Yuichi Sato†1, Shinichi Kajihara‡2 and Yoshio Kaneko§1 1. Department of Architecture and Architectural Engineering, Kyoto University, Kyoto 615-8540, Japan 2. Technology Center, Taisei Corporation, Yokohama 245-0051, Japan Abstract: This paper presents three-dimensional fi nite element (FE) analyses of an all-frame model of a three-story reinforced concrete (RC) building damaged in the 1999 Taiwan Chi-Chi Earthquake. Non-structural brick walls of the building acted as a seismic resistant element although their contributions were neglected in the design. Hence, the entire structure of a typical frame was modeled and static and dynamic nonlinear analyses were conducted to evaluate the contributions of the brick walls. However, the results of the analyses were considerably overestimated due to coarse mesh discretizations, which were unavoidable due to limited computer resources. This study corrects the overestimations by modifying (1) the tensile strengths and (2) shear stiffness reduction factors of concrete and brick. The results indicate that brick walls improve frame strength although shear failures are caused in columns shortened by spandrel walls. Then, the effectiveness of three types of seismic retrofi ts is evaluated. The maximum drift of the fi rst fl oor is reduced by 89.3%,