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

（同濟(jì)大學(xué)土木學(xué)院建筑工程系，上海 200092）
［摘要］采用基于B-R運(yùn)動(dòng)準(zhǔn)則的改進(jìn)判別方法，結(jié)合結(jié)構(gòu)時(shí)程響應(yīng)曲線判定弦支穹頂結(jié)構(gòu)的動(dòng)力穩(wěn)定性，研究拉索預(yù)應(yīng)力、矢跨比對(duì)弦支穹頂動(dòng)力穩(wěn)定性能的影響。算例分析研究表明，在動(dòng)力荷載作用下存在一組最優(yōu)預(yù)應(yīng)力，此時(shí)結(jié)構(gòu)動(dòng)力穩(wěn)定臨界荷載較大；在不同預(yù)應(yīng)力作用下，隨著矢跨比增大，結(jié)構(gòu)臨界荷載增大；在同一預(yù)應(yīng)力作用下，隨著矢跨比增大，結(jié)構(gòu)臨界荷載增大但幅度很小。
［關(guān)鍵詞］弦支穹頂；預(yù)應(yīng)力；臨界荷載；動(dòng)力穩(wěn)定
Influence of pre-stress on dynamic stability of suspen-domes
Liu Huijuan, Luo Yongfeng（Department of Building Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract:Based on B-R criteria,combined the method and time history response curves, the dynamic stability of suspen-domes was judged. The dynamic stability characteristics with different pre-stress values were analyzed under three-dimensional seismic excitation. The numerical results show that there is a group of optimal pre-stresses under which the critical dynamic load of the structure is higher; Under different pre-stress, the critical dynamic load of the structure increases with the increase of the ratio of rise to span. While under the same pre-stress, the increasing magnitude gradually decreases.
Keywords:suspen-dome; pre-stress; critical load; dynamic stablity
*世博場(chǎng)館大空間結(jié)構(gòu)安全保障關(guān)鍵技術(shù)（05dz05812）。
作者簡(jiǎn)介：劉慧娟，博士研究生，Email:lhj8110@163.com。
參考文獻(xiàn)
［1］史杰.弦支穹頂結(jié)構(gòu)力學(xué)性能分析和實(shí)物靜動(dòng)力試驗(yàn)研究［D］.天津:天津大學(xué),2004.
［2］ 劉慧娟,羅永峰,韓慶華. 弦支穹頂結(jié)構(gòu)動(dòng)力穩(wěn)定性分析方法［J］.西南交通大學(xué)學(xué)報(bào),2008,43(6): 729-735.
［3］ 葛家琪,張國(guó)軍,王樹(shù).弦支穹頂預(yù)應(yīng)力施工過(guò)程仿真分析［J］.施工技術(shù),2006,35(12):10-13.