汶川地震中填充墙钢筋混凝土框架结构抗震性能思考

REFLECT ON THE SEISMIC PROPERTY OF THE R.C. FRAME WITH INFILL WALLS DURING WENCHUAN EARTHQUAKE

填充墙钢筋混凝土框架结构系指钢筋混凝土框架结构中为了围护或分隔房间在柱间嵌筑砖或其它砌块填充墙体而形成的一种复杂组合结构。已有的研究表明,填充墙对框架结构的承载力、刚度、变形性能及整个建筑物的动力特性均有很大的影响。目前中国的设计规范中对于填充墙与框架的协同工作无量化的设计方法。汶川大地震中大量填充墙框架结构发生不同程度的损坏,该类建筑的表现极大地丰富了人们对其抗震性能的认识。详细介绍了地震中填充墙框架结构的各种表现,试图分析其破坏机理,在此基础上为该类建筑物的抗震设计提出建议。

The RC frame with infill walls constructed with hollow shale tiles and solid clay bricks which are used to divided into the room is a complicated composite structure. Research shows that the infill walls have great effect on the capacity, stiffness, deformation behavior of frames and the dynamic property of the building. However, the seismic code of buildings in China has not clearly indicated the relation between RC frame and infill walls in quantifying way. A lot of RC frames with infill walls were attacked by Wencbuan Earthquake, so damage styles of the RC frames with infill wails varied greatly, which enrich the knowledge about the seismic property of the infilled frames. In the paper, the failure mode of The RC frame with infill walls was introduced. Meanwhile, the failure mechanism of infilled frame was analyzed. Some conclusions and suggestions were put forward in this paper.