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（深圳市建筑設(shè)計(jì)研究總院有限公司， 深圳 518031）
［摘要］超高層建筑結(jié)構(gòu)自振周期相對較長，易受長周期地震動(dòng)影響，是抗震設(shè)計(jì)時(shí)值得關(guān)注的問題。從PEER強(qiáng)震記錄庫中選取了Ⅱ類、Ⅲ類、Ⅳ類場地共410條工程中常用的強(qiáng)震記錄，以一棟高250m、自振周期為6s的超高層建筑結(jié)構(gòu)為例，從輸入與輸出兩個(gè)層面對長周期地震動(dòng)作用下的結(jié)構(gòu)響應(yīng)進(jìn)行研究。輸入層面，以規(guī)范設(shè)計(jì)反應(yīng)譜為比較基準(zhǔn)，通過分析地震動(dòng)加速度反應(yīng)譜，了解不同場地地震動(dòng)的頻譜特征；輸出層面，以規(guī)范設(shè)計(jì)反應(yīng)譜作用下的基底剪力為基準(zhǔn)，通過分析超高層建筑結(jié)構(gòu)在各類場地地震動(dòng)作用下的基底剪力，獲得不同場地地震動(dòng)作用下的結(jié)構(gòu)響應(yīng)水平；同時(shí)，引用日本國土交通省公布的長周期設(shè)計(jì)地震動(dòng)進(jìn)行橫向比較，通過彈塑性時(shí)程分析得到的不同時(shí)刻下結(jié)構(gòu)塑性轉(zhuǎn)角分布情況及發(fā)展規(guī)律，揭露長周期地震動(dòng)作用下結(jié)構(gòu)的響應(yīng)特征與控制因素。
［關(guān)鍵詞］超高層建筑； 長周期； 地震動(dòng)
中圖分類號：TU375文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)21-0029-05
Research on structural response of super high-rise buildings under long -period ground motion
Liu Qiongxiang, Tang Xi, Zhou Bin, Yang Wanghua
（Shenzhen General Institute of Architectural Design and Research Co., Ltd.， Shenzhen 518031， China）
Abstract:The super high-rise building structure has relatively long natural vibration period, so it is easily affected by long-period ground vibration. This is a problem worthy of attention in seismic design. The strong earthquake records commonly used in 410 projects of Class Ⅱ, Class Ⅲ and Class Ⅳ sites were selected from the PEER strong earthquake record database. A super high-rise building structure with a height of 250m and a natural vibration period of 6s was taken as an example. The structural response of the structure of the input and output levels under long-term ground motion was studied. At the input level, the response spectrum of the standardized design was used as the comparison benchmark, and the spectrum characteristics of the ground vibration in different sites were understood by analyzing the response spectrum of the ground vibration acceleration. At the output level, base shear force under the action of response spectrum of standard design was taken as the benchmark. Base shear force under the action of various ground motions of super high-rise building structures was analyzed to obtain the structural response levels under the action of ground motions of different sites. At the same time, by referring to the lateral comparison of long-period designed ground motion published by Japan Ministry of Land, Infrastructure, Transport and Tourism, the distribution and development law of structural plastic rotation angle at different time points were obtained through elastic-plastic time-history analysis, and the response characteristics and control factors of structures under the action of long-period ground motion were revealed.
Keywords:super high-rise building; long-period; ground motion
作者簡介：劉瓊祥，教授級高級工程師，Email：liu.qx@szonline.net。
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