汶川地震震中某钢筋混凝土框架结构的非线性地震反应分析

2008年5月12日,四川省汶川县发生了里氏8.0级地震,造成了巨大的人员伤亡以及工程结构震害。位于震中映秀镇的漩口中学教学综合楼是按照《建筑抗震设计规范(GB50011-2001)》进行设计的,按7度进行抗震设防。在此次地震中,该建筑破坏严重,工程震害典型。为此,本文考虑了钢筋混凝土与砌体的材料非线性性质,建立了框架填充墙结构的非线性分析模型,进行了非线性有限元时程分析,分析了结构破坏的原因,讨论了填充墙体对结构抗震性能的影响,为该类结构的抗震设计提供了一定的依据。

Analysis of Non-linear Seismic Response of a Reinforced Concrete Frame Structure in the Epicenter Area of Wenchuan Earthquake

On 12 May 2008, an earthquake with magnitude 8.0 occured in Wenchuan, Sichuan province, China. It is the most serious earthquake in china since 1949, and causes very huge casualties and engineering damages to the buildings. The complex building of Yingxiu secondary school in Yingxiu town was designed according to the Code for Seismic Design of Buildings of China (GB50011-2001), the seismic fortification intensity of the buildings was seventh degree. After the earthquake, this building was destroyed seriously, and the engineering damage was characteristic. In the paper, we established a nonlinear analysis model for in filled frame structure with the consideration of material nonlinearity properties. Then, the time history analysis and nonlinear static analysis during inelastic stage were performed, and the main cause of structural destruction was obtained, Finally, the discussion of influence of infill wall on structure in this paper is valuable of providing reference for the seismic design of in filled frame structure in future.