汶川地震中填充墙对钢筋混凝土框架结构抗震性能的影响及分析

Seismic analysis of masonry-infilled RC frame structures in Wenchuan earthquake

汶川地震中大量钢筋混凝土框架结构受到不同程度的损坏,主要的震害表现为框架结构的填充墙出现严重开裂或破坏,而框架结构的主体构件(框架梁、框架柱)破坏相对较轻。目前,我国规范中填充墙对框架结构抗震性能的影响没有详细说明,而填充墙与框架结构的相互作用对于结构抗震性能的影响却是存在的。结合汶川地震中填充墙框架结构的各种破坏情况,研究填充墙与框架结构之间作用的机理,分析地震作用下填充墙对于框架结构抗震性能的影响,并对填充墙框架结构的抗震设计和抗震加固提出合理的建议。

In the Wenchuan earthquake,a mass of masonry-infilled RC frame stucures suffered different degree of destruction,the main earthquake damage is that the masonry-infilled walls presented the serious crack or the destruction,but the damage of main frame member was relatively light,such as beams or columns. At present,the seismic property of the masonry-infilled walls hasn＇t explicit explanation in our nation code,but the influence of the masonry-infilled walls and RC frame stucures＇s interaction to the RC frame seismic property existed. Combined with different destruction situation of masonry-infilled RC frame structures,the interactive mechanism of the masonry-infilled walls and frame stucures was studied,and the influence of the masonry-infilled walls to the RC frame seismic property was analyzed. Moreover the reasonable proposal to masonry-infilled RC frame structure＇s seismic design and strengthening was put forward.