混凝土自锚式悬索桥结构受力参数影响研究

Research on the influence of mechanical parameters on concrete self anchored suspension bridge structure

以某混凝土自锚式悬索桥为依托,选取主缆自身重量、主梁自身重量、混凝土材料收缩徐变等设计参数,采用midas Civil大型有限元分析软件,探究了以上设计参数对该桥主缆形状及缆索内力的影响。结果表明:在设计过程及施工监控计算中,应准确统计主缆及加劲梁等恒载,找到合理成桥状态,在此基础上开展后续工作;混凝土主梁受收缩徐变影响较大,不同程度改变着主缆形状,应适当提高混凝土龄期,降低收缩徐变对成桥线形的不利影响。

The paper is based on a concrete self anchored suspension bridge,selecting design parameters such as the weight of the main cable,the weight of the main beam,and the shrinkage and creep of the concrete material.The midas Civil large-scale finite element analysis software is used to explore the influence of the above design parameters on the shape of the main cable and the internal force of the cable of the bridge.The results show that in the design process and construction monitoring calculation,accurate statistics should be made on the permanent loads of the main cable and stiffening beam to find a reasonable bridge completion state,and subsequent work should be carried out on this basis.The concrete main beam is greatly affected by shrinkage and creep,which changes the shape of the main cable to varying degrees.The concrete age should be appropriately increased to reduce the adverse effects of shrinkage and creep on the bridge alignment.