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趙作周，  郭  恩，  錢(qián)稼茹

(清華大學(xué)土木工程系，北京100084)

 

[摘要] 我國(guó)現(xiàn)行《建筑抗震設(shè)計(jì)規(guī)范》( GB 50011-2010)中，設(shè)計(jì)反應(yīng)譜曲線的適用于結(jié)構(gòu)特征周期6s以內(nèi)的結(jié)構(gòu)，對(duì)超過(guò)6s的結(jié)構(gòu)地震影響系數(shù)取值沒(méi)有規(guī)定，對(duì)設(shè)計(jì)譜長(zhǎng)周期部分的研究不足。以近年來(lái)國(guó)內(nèi)外大地震的強(qiáng)震記錄特別是汶川地震記錄為基礎(chǔ)，研究地震動(dòng)強(qiáng)度隨斷層距、場(chǎng)地特性、阻尼比等參數(shù)的變化規(guī)律，探討了反應(yīng)譜長(zhǎng)周期部分(≥6s)的變化規(guī)律和衰減特性，提出了中國(guó)抗震設(shè)計(jì)規(guī)范中設(shè)計(jì)譜長(zhǎng)周期部分的取值建議。

[關(guān)鍵詞] 設(shè)計(jì)反應(yīng)譜；長(zhǎng)周期；剪重比

中圖分類號(hào)：TU971    文獻(xiàn)標(biāo)識(shí)碼：A  文章編號(hào)：1002-848X(2012) S2-0233-03

 

Zhao Zuozhou, Guo En, Qian Jiaru

( Department of Civil Engineering,  Tsinghua University,  Beijing 100084,  China)

 

Abstract: Structural seismic influence coefficient within six seconds is prescribed by design response spectrum in Code for seismic design of buildings( GB 50011-2010) currently. Structural seismic influence coefficient without six seconds is not provided. The long-period part had been studied not much. In this study, strong ground motion records of large earthquakes were using at home and abroad in recent years, especially Wenchuan earthquake. Variation rule between ground motion intensity and fault distance, site characterization, damping ratio was studied.  Spectral variation rule and attenuation characteristics of the long-period( ≥6s)  part were summarized.  Seisnuc design specification values of long-period part are proposed.

Keywords: design response spectrum; long period; shear weight ratio