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（1 蘭州理工大學(xué)甘肅省土木工程防災(zāi)減災(zāi)重點(diǎn)實(shí)驗(yàn)室， 蘭州 730050： 

2 蘭州理工大學(xué)西部土木工程防災(zāi)減災(zāi)教育部工程研究中心， 蘭州 730050）

［摘要］近斷層脈沖型地震動(dòng)和遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)是兩類(lèi)特殊的長(zhǎng)周期地震動(dòng)，對(duì)這兩類(lèi)地震動(dòng)作用下長(zhǎng)周期結(jié)構(gòu)特別是超限結(jié)構(gòu)響應(yīng)的對(duì)比研究還很少。以集集地震動(dòng)記錄為數(shù)據(jù)基礎(chǔ)，各選取10條具有代表性的近斷層脈沖型地震動(dòng)記錄和遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)記錄，首先對(duì)兩類(lèi)地震動(dòng)的頻譜特性進(jìn)行了對(duì)比研究，分析了兩類(lèi)地震動(dòng)的特點(diǎn)，在此基礎(chǔ)上，以所選取的這兩類(lèi)地震動(dòng)分別作為輸入，對(duì)一個(gè)超限高層結(jié)構(gòu)分別進(jìn)行了8度（0-2g）多遇水準(zhǔn)地震作用下的彈性時(shí)程分析和罕遇水準(zhǔn)地震作用下的彈塑性時(shí)程分析，并對(duì)兩類(lèi)特殊長(zhǎng)周期地震動(dòng)作用下的結(jié)構(gòu)位移響應(yīng)和加速度響應(yīng)結(jié)果做了比較研究。結(jié)果表明，近斷層脈沖型地震動(dòng)和遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)作用下結(jié)構(gòu)的最大層間位移角都接近規(guī)范限值甚至超出限值，遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)作用下的結(jié)構(gòu)位移響應(yīng)和加速度響應(yīng)都大于近斷層脈沖型地震動(dòng)輸入下的相應(yīng)響應(yīng)。因此，對(duì)長(zhǎng)周期結(jié)構(gòu)進(jìn)行抗震性能分析時(shí)，選擇遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)更加偏于安全。

［關(guān)鍵詞］長(zhǎng)周期結(jié)構(gòu)； 近斷層脈沖型地震動(dòng)； 遠(yuǎn)場(chǎng)類(lèi)諧和地震動(dòng)； 反應(yīng)譜； 時(shí)程分析； 超限高層建筑

中圖分類(lèi)號(hào)：TU352-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)05-0072-05

Seismic response analysis of an out-of-code high-rise building structure under special long-period ground motion

Han Jianping1, 2, Shi Jinhui1, 2

(1 Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China; 2 Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract:Near-fault pulse-type ground motion and far-field harmonic-like ground motion are two kinds of specific long-period ground motions. The comparative studies on seismic responses of long-period structures under these two types of ground motions are rare, especially for out-of-code high-rise buildings. Based on the data of Chi-Chi earthquake records, 10 representative near-fault pulse-type ground motion records and far-field harmonic-like ground motion records were selected respectively. First of all, the spectrum properties and characteristics of two types of ground motion were analyzed and compared.Based on this, the two types of selected long-period ground motion records were taken as inputs to carry out elastic time-history analysis under frequent earthquake action and elastic-plastic time-history analysis under rare earthquake action on an out-of-code high-rise building in 8-degree seismic fortification region with basic ground acceleration of 0.2g. And the results of displacement response and acceleration response were  compared and analyzed for the structure under two kinds of special long-period ground motions. The results show that the maximum interstroy drift ratios under these two types of long-period ground motion are close to code limited value or even beyond the limited value. And the structural displacement response and acceleration response under soft soil far-field harmonic-like ground motions are higher than the corresponding responses under near-fault pulse-type ground motions. It indicates that it is more secure for long-period structures to choose far-field harmonic-like ground motions to investigate their seismic performances.

Keywords:long-period structure; near-fault pulse-type ground motion; far-field harmonic-like ground motion; response spectrum; time-history analysis; out-of-code high-rise building

*國(guó)家自然科學(xué)基金項(xiàng)目(51268036)。

作者簡(jiǎn)介：韓建平，博士，教授，博士生導(dǎo)師，Email：jphan@lut.cn。