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

（中國(guó)鐵路設(shè)計(jì)集團(tuán)有限公司， 天津 300250）

［摘要］為減少局部構(gòu)件破壞引起結(jié)構(gòu)連續(xù)倒塌的可能性,運(yùn)用等效荷載瞬時(shí)卸載法對(duì)一綜合交通樞紐中央站房屋蓋進(jìn)行了不同支座失效情況下的結(jié)構(gòu)抗連續(xù)倒塌動(dòng)力分析。利用應(yīng)力比法分析站房結(jié)構(gòu)屋蓋的重要構(gòu)件，采用ABAQUS軟件對(duì)結(jié)構(gòu)進(jìn)行非線(xiàn)性動(dòng)力分析，構(gòu)件破壞判斷標(biāo)準(zhǔn)參考美國(guó)規(guī)范的要求。介紹抗連續(xù)倒塌動(dòng)力分析的承載力和變形判定準(zhǔn)則，分析在關(guān)鍵構(gòu)件失效瞬間結(jié)構(gòu)的應(yīng)力比和變形能否滿(mǎn)足設(shè)計(jì)要求。結(jié)果表明，在不同位置支座失效的情況下,該屋蓋發(fā)生了局部破壞，但破壞限制在去除構(gòu)件周?chē)囊欢ǚ秶鷥?nèi);邊支座失效情況下，結(jié)構(gòu)破壞范圍明顯加大,但最終破壞仍限制在局部范圍，不會(huì)造成整體結(jié)構(gòu)的連續(xù)坍塌。

［關(guān)鍵詞］單層編織拱殼； 抗連續(xù)倒塌； 瞬時(shí)卸載法； 動(dòng)力分析； 等效荷載

中圖分類(lèi)號(hào)：TU323文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)11-0064-06

Progressive collapse analysis of large-span single-layer braided arched-shell

Tian Chenghao, Liu Ming, Dong Cheng

(China Railway Design Corporcation, Tianjin 300250, China)

Abstract:In order to reduce the possibility of structural progressive collapse caused by the failure of local components, the equivalent load transient unloading method was used to conduct anti-progressive collapse dynamic analysis on building roof for central station of an integrated transportation hub under the condition of different supports failure. Stress ratio method was used to analyze the key components of the roof of the station building structure, and the nonlinear dynamic analysis of the structure was carried out by using ABAQUS software. The standards of component failure judgment referred to the requirements of the U.S. code. The bearing capacity and deformation criterion of anti-continuous collapse analysis were introduced to analyze whether the stress ratio and deformation of the structure could meet the design requirements. The results show that local failure occurs in the roof under the condition of different supports failure, but the failure is limited to a certain range around the removal members. In the case of failure of the side support, the failure range of the structure obviously increases, but the final failure is still limited to the local scope, which will not cause the continuous collapse of the overall structure.

Keywords:single-layer braided arched-shell; anti-progressive collapse; transient unloading method; dynamic analysis; equivalent load

作者簡(jiǎn)介：田承昊，碩士，工程師，Email:tianchenghao@crdc.com。