彭山体育馆的抗震加固

THE ASEISMIC REINFORCEMENT OF STRUCTURE FOR PENGSHAN SPORTS CENTER

近年来地震频发,2010年国家颁布了新的抗震规范,根据《防震减灾法》的有关要求需对新规范颁布之前修建的既有体育馆进行抗震分析与鉴定加固。同时,体育馆由于空间大、可容纳人数多等优点已渐渐成为重要的避难场所。为此,开展对既有大跨度体育馆进行动力时程分析与抗震加固的研究,对其能否作为抗震区域紧急避难场所的建筑物有着重要意义。汶川地震之后的鉴定过程中,一些既有大跨度钢结构体育馆建筑在设计上暴露了一些问题,如抗震性能差、钢柱倾斜过大、结构锈蚀严重等问题。通过对20世纪80年代建设的彭山体育馆抗震加固前后的动力时程分析,探讨柱间侧向支撑对柱端位移和柱底剪力的影响,指出侧向支撑在大跨度体育馆钢结构中的重要性。

In recent years , earthquakes treatmently occur , the new seismic code has been developed , the seismic analysis and identification of reinforcement were needed for the existing gyms built before the promulgation of new seismic code.Meanwhile, the gyms have gradually become an important place of refuge due to their large space and a number of people can be accommodated , therefore , carrying out dynamic analysis and seismic reinforcement research on the existing gyms has a great significance to the building which may become a seismic regional emergency shelter.In the assessment process after the Wenchuan earthquake , some problems occurred in existing steel building designs, such as poor seismic performance , large tilt of the steel columns , serious corrosion of the structure corrosion etc.The column-and-brace ’ s impaction on the entire structure was researched by the time history analysis of an existing typical steel gymnasium , that is Pengshan Gym , before and after reinforcement of the structure , the importance of lateral support in large span steel structure gyms was demonstrated .Then a simple and effective ways to seismic reinforcement of the existing gyms are pointed out .