(1 沈阳建筑大学土木工程学院，沈阳 110168；  2 上海师范大学建筑工程学院，上海 201418)

［摘要］高耸结构的震害资料表明，竖向地震作用对结构的破坏起很大的作用。根据冲击原理，考虑场地土的影响，对高耸结构的竖向地震作用进行了计算分析。结果表明，场地土类别对竖向地震作用的影响较大，场地土类别越高，竖向地震力越大。Ⅱ类场地土上的烟囱在

9度区才会产生竖向拉力；Ⅳ类场地土上的烟囱在7度区就会产生竖向拉力，在9度区则会产生非常大的竖向拉力和竖向压力。因此在高耸结构的竖向地震作用计算中，场地土的影响因素应引起足够的重视。

［关键词］高耸结构；竖向地震作用；冲量法；场地土类别

Analysis on vertical earthquake in high-rise building with site effect

Liu Haicheng1, Zhang Yuxin2

(1 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;2 Architecture engineering School, Shanghai Normal University, Shanghai 201418, China)

Abstract:Statistical data shows that damages of high-rise buildings are mostly caused by vertical earthquake action. Based on collision theory, the vertical earthquake action in high-rise buildings is calculated and analyzed,in which the site effect is considered. The calculated results indicate that higher the site type is,  more notable the vertical earthquake action is. For chimneys in the second type of site, vertical tensile forces just generate at the top of chimneys wherethe seismic fortification intensity is 9. Whereas in the fourth type of site, vertical tensile forces already generate where the seismic fortification intensity is 7, and extraordinary vertical tensile and compressive forces will exist where the seismic fortification intensity is 9. Therefore, the site effect is all -important for vertical earthquake action in high-rise buildings, and should be considered in calculations.

Keywords:highrise buildings; vertical earthquake action; collision theory; site type

作者简介：刘海成，博士后，高级工程师，一级注册结构工程师，注册土木工程(岩土)师，Email:hc_liu@163.com。