884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(清華大學(xué)，北京 100084)
［提要］選擇了被認(rèn)為精度較高或者有關(guān)規(guī)范中建議的8種等效線性化方法，以4種場(chǎng)地土條件下40條強(qiáng)震記錄為輸入，通過時(shí)程分析方法對(duì)各種等效線性化方法計(jì)算彈塑性SDOF系統(tǒng)能量譜的精度進(jìn)行了分析。分析結(jié)果表明，現(xiàn)有等效線性化方法的等效周期和等效阻尼比之間存在較大差異，且用于預(yù)測(cè)彈塑性SDOF系統(tǒng)的能量譜時(shí)存在較大誤差。根據(jù)能量譜分析結(jié)果的統(tǒng)計(jì)計(jì)算，建議了一種新的適用于彈塑性SDOF系統(tǒng)能量譜計(jì)算的等效線性化方法。
［關(guān)鍵詞］彈塑性SDOF系統(tǒng)；能量譜；等效線性化；時(shí)程分析
Estimation of Input Energy Spectra of Inelastic SDOF Systems with Equivalent Linear Method/Cheng Guangyu，Ye Lieping(Tsinghua University, Beijing 100084, China)
Abstract:The precision of eight existing equivalent linearization methods to be used to obtain the input energy spectra is evaluated by time history analysis using 40 earthquake records from different sites. The results indicate that there is a large error in prediction of input energy spectra by the preceding methods. Based on the statistical analysis, a new equivalent linearization method to estimate input energy spectrum is proposed. Numerical results for real ground motions having very different characteristics show that the method gives a reasonable prediction.
Keywords:inelastic SDOF system; input energy spectra; equivalent linearization; time history analysis
*教育部科技創(chuàng)新工程重大項(xiàng)目培育資金資助項(xiàng)目(704003)；廣東省地震工程與應(yīng)用技術(shù)重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目(kzg-007)。