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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］體內(nèi)預(yù)應(yīng)力大懸挑鋼管桁架結(jié)構(gòu)是在桁架的上弦鋼管之內(nèi)設(shè)置拉索，使索與鋼管桁架共同工作的預(yù)應(yīng)力鋼結(jié)構(gòu)體系，可以提高結(jié)構(gòu)的靜、動(dòng)力性能和穩(wěn)定性能。以一幢辦公樓的體內(nèi)預(yù)應(yīng)力大懸挑屋蓋鋼結(jié)構(gòu)工程為例，通過(guò)對(duì)結(jié)構(gòu)進(jìn)行靜力計(jì)算、整體穩(wěn)定計(jì)算和大震作用彈塑性時(shí)程分析，全面研究了初始缺陷、幾何非線性、材料彈塑性和預(yù)應(yīng)力對(duì)結(jié)構(gòu)整體穩(wěn)定性能的影響，分析了在罕遇地震下結(jié)構(gòu)的抗震延性性能。
［關(guān)鍵詞］大懸挑桁架；幾何非線性；材料非線性；穩(wěn)定性能
Design and research on large span internal prestressed cantilevered pipe trusses
Guan Zhizhong1, Wang Mingzhu1, Ge Jiaqi1, Hu Yang2(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China； 2 Beijing University of Technology, Beijing 100124, China)
Abstract:The large span internal prestressed cantilevered pipe trusses structure system means that the prestressed cable is installed in the penetrated welded pipe truss on the top chord, to form a new-style internal prestressed structural steel system of the coincident work of the pipe truss and the cable, which is able to adjust the structural mechanics and increase the structural static behavior, dynamic behavior and the overall stability performance.  The large span internal prestressed cantilevered roof structure for an office building is selected to obtain the impact of the prestress on the structural internal force by static analysis, overall stability analysis and ultimate seismic elastic-plastic time-history analysis. The structural overall stability analysis is conducted considering initial imperfection, geometric nonlinearity, elastic-plastic material and prestress. The ultimate seismic elastic-plastic analysis is conducted. The results provide some references to other similar projects.
Keywords:large span cantilevered truss; geometric nonlinearity; material nonlinearity; stability
作者簡(jiǎn)介：管志忠(1960-)，男，高級(jí)工程師，Email:capdi.gssd@vip.163.com。
參考文獻(xiàn)
［1］陸賜麟，尹思明，劉錫良.現(xiàn)代預(yù)應(yīng)力鋼結(jié)構(gòu)［M］.北京：人民交通出版社，2003.
［2］韓慶華，裴波，等.預(yù)應(yīng)力組合鋼網(wǎng)架結(jié)構(gòu)的理論分析與應(yīng)用研究［J］.建筑工程學(xué)報(bào),2004，(1)：87-92.