通过对唐山、天津等地区地震灾害的考察,我们认为造成房屋倒塌和严重破坏,是因震级大,唐山位于极震区内,房屋未考虑抗震设防,天津设防的也不多。唐山和天津的房屋建设本身也存在某些问题,除设计、施工的问题外,建筑材料重量大、强度低亦是因素之一。砖混结构的倒塌,主要是由于砖砌体重量大,强度低,不能承受由地震力引起的水平剪力所致。单层工业厂房的破坏, Through the investigation of the earthquake disasters in Tangshan and Tianjin, we believe that the collapse of the house and its severe damage were caused by the large magnitude. Tangshan was located in the extremely earthquake-prone area and the house did not consider seismic fortification. There were not many fortifications in Tianjin. The housing construction in Tangshan and Tianjin itself also has certain problems. In addition to the problems of design and construction, the heavy weight and low strength of building materials are also factors. The collapse of the brick-concrete structure is mainly due to the large weight and low strength of the brickwork, which cannot withstand the horizontal shear caused by seismic forces. Destruction of single-story industrial plants,