张文芳  程文瀼   李爱群
    （东南大学 南京 210096）

[提要]  在水平地震作用下，多层砌体结构一般只考虑层间墙体抗剪承载力和结构整体倾覆等方面的问题，而地震倾覆力矩对层间墙体的影响，特别是弯曲影响却很少研究。为此，提出一个新的计算模型，探讨了砌体结构在地震作用下的墙体内力和承载力，特别是由地震弯矩引起的墙体大偏心受压情况，并据此研究了地震倾覆力矩对墙体破坏的影响。倾覆力矩引起的墙体大偏心受压是引起砌体结构地震破坏的一个关键因素。
[关键词]  砌体结构  多层砖房 地震倾覆力矩 墙体 偏心受压

The internal force and the bearing capacity of masonry walls subjected to overturning moment under earthquake are studied,  especially in the case of compression with large eccentricity caused by seismic bending moment in walls. The impact of earthquake overturning moment on structural failure is investigated. It is pointed out that the eccentric compression of masonry walls is an important factor leading to failure and collapse of masonry buildings.
Keywords: masonry structures; multistoried brick buildings; seismlc overturning moment; walls, eccentric compression