某砖混结构住宅加固可靠性分析

Reliability Analysis for Strengthen Housing of Masonry Structure

某砖混结构房屋建于20世纪80年代,汶川地震中该房屋破坏严重,震后对破坏墙体采用植入钢筋-灌浆-外喷混凝土方法进行加固。依据破坏情况,采用5种加固方案对其进行加固设计,并用结构设计软件PKPM对其进行对比分析。结果表明:采用对1层～3层房屋部分纵墙加固的方案,可有效改善墙体抗剪性能和提高房屋的抗震能力。对施工质量及管理情况进行严格监管,经过本地区4次5级以上余震,房屋未出现任何破坏,通过实践验证了论证该加固方案具有一定可行性。

A masonry structure building built in 1980’s,it’s severely damaged in Wenchuan earthquake,the walls of the house was strengthened after the earthquake which adopted the method of implanting steel bar-cementing in slurry-spraying concrete to reinforcement.According to the damage,five kinds of reinforcement design schemes are adopted and comparative analysis with designing and analysis software PKPM is carried out.The results shows that： using local treatment programs to 1-3 layers vertical wall can effectively improve shear capability of the wall and aseismic capability of the house.The construction quality and administrative need strict management.After four times exceeding 5 earthquake,the house has not damaged,which prove the reinforcement to be certain feasible.