發(fā)布時(shí)間：2018-01-18 09:52

  本文關(guān)鍵詞：考慮近場(chǎng)地震豎向效應(yīng)的改進(jìn)Pushover分析方法　出處：《振動(dòng)與沖擊》2015年20期 　論文類型：期刊論文

  更多相關(guān)文章： 近場(chǎng)地震 豎向效應(yīng) Pushover分析方法

【摘要】：基于結(jié)構(gòu)動(dòng)力學(xué)理論推導(dǎo)兩種考慮近場(chǎng)地震豎向效應(yīng)的改進(jìn)Pushover分析方法。按合理方式在結(jié)構(gòu)的每個(gè)集中質(zhì)量處施加豎向地震力,并據(jù)結(jié)構(gòu)屈服后動(dòng)力特性對(duì)其水平加載模式及形狀向量進(jìn)行修正。采用兩種改進(jìn)Pushover分析方法及兩種傳統(tǒng)Pushover分析方法,估計(jì)近場(chǎng)條件下兩個(gè)框架結(jié)構(gòu)頂點(diǎn)位移、樓層位移及層間位移。以算例結(jié)構(gòu)在30組近場(chǎng)地震記錄作用下的時(shí)程分析統(tǒng)計(jì)結(jié)果為基準(zhǔn),評(píng)估4種Pushover分析方法估計(jì)精度。結(jié)果表明,改進(jìn)方法Ⅱ的精度最高,對(duì)算例框架最大頂點(diǎn)位移、最大樓層位移及最大層間位移估計(jì)結(jié)果均較準(zhǔn)確,可用于近場(chǎng)條件下規(guī)則結(jié)構(gòu)的地震反應(yīng)分析及地震損傷評(píng)估。
[Abstract]:Based on the theory of structural dynamics, two improved Pushover analysis methods considering the vertical effect of near-field earthquakes are derived. The vertical seismic forces are applied to each concentrated mass of the structure in a reasonable manner. According to the dynamic characteristics of the structure after yield, the horizontal loading mode and shape vector are modified. Two improved Pushover analysis methods and two traditional Pushover analysis methods are adopted. The vertex displacement, floor displacement and floor displacement of two frame structures under near-field conditions are estimated. The statistical results of time-history analysis of two frame structures under the action of 30 groups of near-field seismic records are taken as the benchmark. The estimation accuracy of four Pushover analysis methods is evaluated. The results show that the precision of improved method 鈪，

本文編號(hào)：1440425