异型钢人行天桥空间静动力行为分析宗雪梅.pdfVIP

　27 　2 　　　 Vol.27 　No.2　 2010 4 April 2010 1, 2 1, 3 2 宗雪梅 　周新平 　杜坤 (1. 　710064; 2.　710068; 3.　 710075) (1.Key Laboratory for Bridge and Tunnel of Shannxi Pro ince,ChangAn Uni ersity,XiAn 710064, China;2.XiAn Municipal Engineering Design and Research Institute, 710068,China; 3.The First Highway Sur ey Design Institute of China,XiAn 710075) [] 本文针对异型钢人行天桥的复杂受力特点,以西安市西三环阿房四路人行天桥为工程 景, 介 绍了此类异型钢人行天桥的设计及构造特点,提出了采用空间仿真结构的建模方法进行分析同时, 对施 工及运营阶段的受力进行了研究,并对动力特征值进行了描述,然后采用反应谱法对抗震问题进行了研 究分析,得出此类桥型的基本受力特性。从而,初步探索了异型空间结构的受力特点和计算方法,为以 后工程实践提供经验和参考根据。 [] 异型钢人行天桥　仿真分析　静动力行为　反应谱法 ABSTRACT:Based on XiAn A f′ang Four Road steel pedestrian bridge, the f eatures of design and construction f or this kind of non -conventional typ e steelp edestrian bridge in connection with its comp lex mechanical character istic were introduced in this paper.Also, space simulator model to analyze this kind of bridge was pointed out,f orce f eatures during construction and operation was studied and dynamic analy sis model was described .Then the earthquake-resis- tance of this bridge was analyzed using earthquake resp onse spectrum .At the meantime, elementary f orce characteristic is obtained .Theref ore numerical methods is ust exp lored preliminarily .All these can provide experience and ref erence f or engineering in the f uture . KEYWORDS:Non -conventional typ e steel pedestrian bridge 　Space simulator model 　Sp atial static and dynamic mechanical behaviour 　Earthquake resp onse spectrum 　　, , 2%; ,, , 160cm,145cm; 。 190cm 80cm , , ,