移动荷载下中承式拱桥吊杆的受力分析

摘要

In the present study, the half-through arch bridge,which was composed of plexiglass bridge floor, arch rings and suspenders, was used as the model to investigate the stress on suspenders of half-through arch bridge under moving load. Uniformly distributed load and moving concentrated load were applied to the model bridge floor, and then the mechanical properties of suspenders and bridge floor were studied. The pulling force distribution rules and stress scopes of suspenders, as well as the stress conditions of arch rings under moving load were obtained. This work provided an accurate theoretical base for the construction of the half-through arch bridge.%为了更加准确地研究中承式拱桥在移动载荷作用下的受力情况,采用相似材料制备了由桥面、拱圈和吊杆构成的中承式吊杆拱桥模型.通过对模型桥面施加均布荷载及移动集中荷载,对桥面和吊杆进行移动载荷力学性能测试,得出了移动荷载作用下的下吊杆受力分布规律、受力范围以及桥面的受力情况.该研究结论可为中承式拱桥设计及在施工之前提供更加准确的理论依据.