钢管混凝土拱桥悬吊桥面系改造方案力学性能分析

Analysis of Mechanical Performance of Suspension Bridge Deck System Reforming Plan for CFST Arch Bridges

文章以一座三跨自锚中承式钢管混凝土拱桥为例,针对该桥悬吊桥面系传力体系安全冗余度不足问题,研究了增设加劲纵梁的体系改造方案,并就增设纵梁对原桥恒载效应、活载效应、温度效应、动力特性等各种力学性能的影响进行了计算分析。结果表明,提出的桥面系改造方案可行,可作为下阶段设计工作开展的依据。

With a three-span self-anchor half-through CFST arch bridge as the example,and regarding the inadequate safety redundancy problem in force transmission system of suspension deck system in this bridge,this article studied the system reconstruction plan of adding the stiffening stringers,and conducted the calculation analysis on the influence of stiffening stringer addition on the various mechanical properties of original bridge＇s dead-load effect,live-load effect,temperature effect,and dynamic characteristics.The results showed that the proposed bridge deck reconstruction scheme is feasible and can be used as the basis for the next phase of design work.