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(1 沈陽建筑大學土木工程學院，沈陽 110168；  2 上海師范大學建筑工程學院，上海 201418)

［摘要］高聳結構的震害資料表明，豎向地震作用對結構的破壞起很大的作用。根據(jù)沖擊原理，考慮場地土的影響，對高聳結構的豎向地震作用進行了計算分析。結果表明，場地土類別對豎向地震作用的影響較大，場地土類別越高，豎向地震力越大。Ⅱ類場地土上的煙囪在

9度區(qū)才會產(chǎn)生豎向拉力；Ⅳ類場地土上的煙囪在7度區(qū)就會產(chǎn)生豎向拉力，在9度區(qū)則會產(chǎn)生非常大的豎向拉力和豎向壓力。因此在高聳結構的豎向地震作用計算中，場地土的影響因素應引起足夠的重視。

［關鍵詞］高聳結構；豎向地震作用；沖量法；場地土類別

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

作者簡介：劉海成，博士后，高級工程師，一級注冊結構工程師，注冊土木工程(巖土)師，Email:hc_liu@163.com。