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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背景,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。
In this paper, according to the complex stress characteristics of profiled steel pedestrian bridge, the design and structural features of such profiled steel pedestrian bridge are introduced based on the construction of the footbridge of the fourth Fangshe West Fourth Ring Road in Xi’an. Method. At the same time, the forces in the construction and operation phases are studied, and the dynamic eigenvalues are described. Then, the response spectrum method is used to analyze the seismic problems, and the basic stress characteristics of such bridges are obtained . Thus, initially explored the stress characteristics and calculation methods of the heterogeneous space structure, providing experience and reference for future engineering practice.