一种类张弦梁人行桥设计实践

Design and Practice of a Beam String-like Pedestrian Bridge

摘要:

以一座类张弦梁人行桥为研究对象，首先介绍了该桥型的设计理念和结构体系，重点介绍了桥梁的总体设计、关键构件和节点的设计要点，包括拱形主梁、刚性索、斜杆、斜塔以及刚性索和主梁与斜塔的连接节点等。并建立了有限元模型，对这种创新的类张弦梁进行受力分析。结果表明，该桥的各项受力指标均满足要求，且结构受力合理，造型轻盈简洁，具有建筑高度小、耐久性好、维护难度低的优势，可为今后这种类张弦梁人行桥的应用和推广提供一定的借鉴。

Abstract:

Taking a beam string-like pedestrian bridge as the research object, the design concept and structural system of this bridge type are introduced. The focus is on the overall design of the bridge and the key design points of its critical structural components and joints, including the arched girder, rigid cables, diagonal rods, inclined pylons, and connection joints between rigid cables, girders and inclined pylons. A finite element model is established to conduct a stress analysis on this innovative beam string-like structure. The results show that all stress indicators of the bridge meet the requirements, the structural stress is reasonable, and the design is light and concise, which has the advantages of small construction height, better durability and low maintenance difficulty, and can provide some references for the application and promotion of such beam string-like pedestrian bridges in the future.