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针对北京市顺义区减河3号景观步行桥—天目桥,详细阐述了该桥的方案比选和结构布置。基于有限元法,建立全桥的空间分析模型,对该桥进行了静力、动力分析。计算结果显示,双层索系曲线斜拉桥方案与普通曲线斜拉桥方案相比,结构的整体刚度和动力性能都得到了改善。通过本文的研究,以期为今后空间布置的双层索系以及异形钢箱梁斜拉桥在人行景观桥梁设计中的应用提供有益参考。
Aiming at the landscape pedestrian bridge - Tianmuqiao, No.3, Jianhe River, Shunyi District, Beijing, the scheme comparison and structural arrangement of the bridge are elaborated. Based on the finite element method, a full-bridge spatial analysis model is established, and the static and dynamic analysis of the bridge is carried out. The calculation results show that the overall stiffness and dynamic performance of the double-deck cable-stayed cable-stayed bridge are improved compared with the conventional one. Through the research in this paper, it is hoped that it will provide useful reference for the application of double-layer cable system and space-layout double-deck cable-stayed bridge with profiled steel box girder in pedestrian bridge design.