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通过对一个采用钢框架结构进行增层的工程的振动特性、地震反应、楼层抗剪承载力等参数的分析研究,揭示了钢框架增层对原结构的影响机理,同时判明了原结构需要抗震加固的部位,进而确定原结构的抗震加固方案。通过运用增大截面法及钢支撑加固法,使增层结构的抗震性能满足规范要求,阐明采用钢框架增层是一种安全、经济的增层方法。
Through the analysis and study of the vibration characteristics, seismic response and floor shear capacity of a project using steel frame structure, the influence mechanism of the overburden of steel frame on the original structure is revealed. At the same time, it is proved that the original structure needs anti-vibration Reinforced parts, and then determine the original structure of seismic reinforcement program. By using the method of enlarged section and steel support reinforcement, the seismic performance of the superstructure can meet the requirements of the code. It is clarified that the use of the steel frame buildup is a safe and economical method of building up layers.