对某密肋楼盖房屋的主体结构进行全面的抗震鉴定,该房屋受当时经济及技术等方面因素的制约,在设计荷载及材料强度取值、结构安全储备大小等方面均较现行国家设计规范和标准要求有一定的差距。为保证房屋用途变更后继续安全使用,进行了原始资料调查、现场检测及结构抗震性能评定,根据评定结果提出了相应的加固方案。加固后的结构基本达到重点设防类抗震设防标准,结构整体性及承载力得到显著提高,改善了结构的安全状况。 The main structure of a multi-ribbed-roofed house has been subjected to a comprehensive seismic appraisal. Compared with the current economic and technical constraints, the house is more robust than the current national design code in terms of design load, strength of materials and the size of structural safety reserve, And the standard requirements have a certain gap. In order to ensure safe use of the house after the change of use, the original data investigation, on-site inspection and structural seismic performance assessment were conducted. Based on the assessment results, the corresponding reinforcement plan was put forward. The reinforced structure basically reached the key fortification-type seismic fortification standards, the structure integrity and bearing capacity have been significantly improved, improving the structural safety status.