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某砖混住宅由于施工质量出现问题,承重砖墙砂浆强度明显低于设计要求,对其结构进行验算得出,实际砂浆强度能够满足竖向承载力,但地震作用下局部墙体抗剪承载力不足。为解决此住宅的抗震问题,提出了一种抗震加固的新方法,采用外墙增加钢筋混凝土板墙和外框架(阳台)法,将地震作用下楼层所受的力部分转移到新增加的钢筋混凝土柱和剪力墙上,从而减轻原结构承重墙所受的力,在保证结构安全性的前提下最大限度地避免对结构内部加固。该方法得到了具体实施,通过了专家鉴定,且加固后结构能够达到设计要求。
Due to the problems of construction quality, the strength of a brick-masonry brick mortar is obviously lower than the design requirement. The checking of its structure shows that the actual mortar strength can meet the vertical bearing capacity, but the shear strength of the local wall under earthquake insufficient. In order to solve the seismic problem of this residential building, a new method of seismic strengthening is proposed, which adopts the method of adding reinforced concrete slab wall and outer frame (balcony) to the external wall to transfer the force part of the floor under the earthquake action to the newly added steel bar Concrete columns and shear walls so as to relieve the forces on the load-bearing walls of the original structure and to minimize the internal reinforcement of the structure while ensuring the structural safety. The method has been implemented, passed the expert appraisal, and the reinforced structure can meet the design requirements.