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(1 中國(guó)航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120； 2 北京工業(yè)大學(xué)，北京 100124)
［摘要］長(zhǎng)春經(jīng)濟(jì)開發(fā)區(qū)的挑篷結(jié)構(gòu)采用塔柱-拉索-鋼管桁架結(jié)構(gòu)體系。首先研究了斜拉索布置、預(yù)應(yīng)力度對(duì)整體穩(wěn)定性能的影響，結(jié)果表明合理布置斜拉索可以顯著提高穩(wěn)定性能；其次對(duì)三種不同的塔柱模型進(jìn)行穩(wěn)定分析，結(jié)果表明塔柱上設(shè)置索撐體系提高了塔柱自身穩(wěn)定性。計(jì)算表明預(yù)應(yīng)力可以有效提高結(jié)構(gòu)承載力和整體穩(wěn)定性能，節(jié)點(diǎn)具有良好的延性性能。罕遇地震作用下的彈塑性時(shí)程分析表明，結(jié)構(gòu)在大震作用下拉索仍處于彈性階段，結(jié)構(gòu)整體尚未進(jìn)入塑性階段，具有良好的抗震延性性能。
［關(guān)鍵詞］塔柱；拉索；預(yù)應(yīng)力度；穩(wěn)定性能
Design and research of structural system of tower-cable-pipe truss
Ge Jiaqi1, Wang Shu1, Zhang Guojun1, Ji Jianping1, Hu Yang2(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120,China； 2 Beijing University of Technology,Beijing 100124,China)
Abstract:The canopy structure of the stand for Changchun stadium employs a structural system of the cable-stayed pipe truss hanged over the top of two towers. The layout effect of the cable and the prestressing ratio are studied, which indicates that the reasonable layout of the cable can apparently increase the structural overall stability. The overall stability analysis for three different towers is conducted, the result of which shows that the tower with the cable system can raise the tower stability. It indicates that the prestressing can effectively increase the structural bearing capacity and the overall stability. And the finite element analysis for the connection is performed to show the connection with well ductility performance. By operating the elastic-plastic time-history analysis, the cable is still at the elastic stage and the whole structure is not involved in the plastic stage. It indicates that the structure owns a good earthquake-resistance performance.
Keywords:tower; cable; prestressing ratio; stability
作者簡(jiǎn)介：葛家琪(1964-)，男，研究員，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:capdi.gssd@vip.163.com。
參考文獻(xiàn)
［1］馮陽，覃陽，甘明，等. 北京2008年奧運(yùn)會(huì)國(guó)家體育館主體結(jié)構(gòu)設(shè)計(jì)［J］. 建筑結(jié)構(gòu)，2008，38(1)：1-5.
［2］鐘文發(fā). 非線性規(guī)劃理論研究［D］. 北京：北京大學(xué)，2007.