汶川地震中房屋震害分析与震损房屋抗震加固

Seismic strengthening and damage analysis of buildings in Wenchuan earthquake

摘要:

为了获得2008年汶川8级强震后相关地区房屋结构震损水平,提出合理的震损房屋抗震加固方法,进行了震损调查与分析．发现震区钢筋混凝土结构房屋主要震损形式为柱压溃、节点失效、强梁弱柱、围护墙及隔墙破坏等;砖砌体结构房屋及底部框架-抗震墙房屋主要震损形式为砖砌体墙的剪切破坏．基于震害分析,提出着重强化震损部位和易损部位抗力水平和着力强化房屋整体牢固性的震损房屋抗震加固思路,完成了震区200余栋震损房屋抗震加固设计与施工．

Abstract:

To investigate the damage level of relative buildings after strong earthquake occurred in Wenchuan, Sichuan province in May 12th 2008, and propose the rational method for strengthening the damaged structures, the damage of buildings was surveyed. Different damages were found in the buildings in the relative regions. Damage types of reinforced concrete buildings mainly included collapse of columns, failure of joints, strong beams and weak columns, failure of infilled wall and partition. Shearing failure was found in the masonry buildings and masonry buildings with reinforced concrete frames on the ground floors. Based on the analysis of damages of these buildings, an idea of retrofitting the damaged building is proposed, i.e., strengthening the damaged members or joints, enhancing the seismic capacity of vulnerability members, and improving the robustness of the structures. According to this idea, the design and construction for more than 200 damaged buildings were conducted.