本文選題：多脈沖分析　切入點：近斷層　出處：《振動與沖擊》2017年02期

【摘要】：對橋梁墩柱在近斷層水平多脈沖地震動激勵下的響應(yīng)特征進(jìn)行了研究。采用多脈沖小波分析方法從選取的22組地震動中識別出17組為脈沖型近斷層地震動并確定了相關(guān)參數(shù)。采用時域疊加小波方法將這些時程與目標(biāo)反應(yīng)譜匹配得到匹配時程,通過匹配前后的時程和反應(yīng)譜對比驗證了匹配的有效性�；贠pen Sees建立了四根橋梁墩柱模型并通過模態(tài)分析與Pushover分析驗證了模型的合理性與準(zhǔn)確性,加載匹配后的地震激勵并分析其響應(yīng)特征。分析表明,匹配時程的反應(yīng)譜與目標(biāo)反應(yīng)譜基本一致,模型與試驗的位移延性能力相對誤差不超過5%。水平面內(nèi)脈沖能量最強(qiáng)方向的地震輸入能量大于水平面其他方向的輸入能量,結(jié)構(gòu)對應(yīng)的地震需求也最大。從位移延性需求的角度應(yīng)考慮水平最強(qiáng)能量的輸入方向,抽取一個主要脈沖波形來替代原地震輸入的做法偏于危險,應(yīng)考慮多脈沖形式來代替單脈沖形式。
[Abstract]:The response characteristics of bridge pier columns under the excitation of horizontal multi-pulse ground motion near faults are studied. Using multi-pulse wavelet analysis method, 17 groups of near-fault ground motions are identified from 22 groups of ground motions selected and determined. The time-domain superposition wavelet method is used to match the time history with the target response spectrum to obtain the matching time history. The validity of the matching is verified by comparison of time history and response spectrum before and after matching. Based on Open Sees, four bridge pier column models are established, and the rationality and accuracy of the model are verified by modal analysis and Pushover analysis. The response spectrum of the matching time history is basically consistent with the target response spectrum. The relative error of displacement ductility between model and test is not more than 5. The input energy of earthquake in the strongest direction of pulse energy in horizontal plane is larger than that in other directions of horizontal plane. From the point of view of displacement ductility demand, the input direction of the strongest energy should be considered, and the method of taking a main pulse waveform to replace the original earthquake input is dangerous. Multi-pulse form should be considered instead of monopulse form.
【作者單位】： 大連理工大學(xué)工程抗震研究所;大連理工大學(xué)海岸與近海工程國家重點實驗室;
【基金】：國家自然科學(xué)基金項目(51678107) 高等學(xué)校博士學(xué)科點博導(dǎo)專項科研基金(20130041110036)
【分類號】：U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 柳春光;夏春旭;;臺灣集集地震近斷層多脈沖地震動分類及特性研究[J];中國科技論文;2015年09期

2 張郁山;趙鳳新;;基于小波函數(shù)的地震動反應(yīng)譜擬合方法[J];土木工程學(xué)報;2014年01期

3 李笑然;王元豐;;基于纖維模型的鋼筋混凝土柱滯回性能數(shù)值分析[J];北京交通大學(xué)學(xué)報;2012年06期

4 全偉;李宏男;;調(diào)整已有地震動擬和規(guī)范反應(yīng)譜人造地震動方法比較[J];防災(zāi)減災(zāi)工程學(xué)報;2008年01期

5 梁智W，

本文編號：1653382