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目前我国既有建筑面积超过500亿平方米,每年新建建筑约20亿平方米,因原设计标准偏低、施工缺陷、维修管理不善、接近设计使用年限等,约有30%~50%的既有建筑进入安全性降低或功能衰退期,亟需进行性能评估与加固改造,以延长使用寿命和提升使用功能。同时,我国是多自然灾害的国家,地震、火灾、水灾等可导致建筑结构严重破坏和倒塌并造成大量人员伤亡,我国地震中死亡人数占全球地
At present, China has an existing building area of more than 50 billion square meters and about 2 billion square meters of newly-built buildings each year. Due to the low original design standards, construction defects, poor maintenance and management, approaching the designed service life, about 30% to 50% As buildings enter a period of reduced safety or functional decline, there is an urgent need for performance assessment and retrofitting to prolong their service life and enhance their functionality. At the same time, our country is a country with multiple natural disasters. Earthquakes, fires and floods can cause serious damage and collapse of the building structure and cause a large number of casualties. The death toll in China’s earthquake