【摘要】 为了研究各种因素对混凝土自锚式悬索桥极限承载力的影响,采用弹塑性有限元方法,对一座跨径160m混凝土自锚式悬索桥的极限承载力进行了全面分析,研究了不同加载方式、混凝土收缩徐变、主梁和索塔配筋率、吊索安全系数、主缆弹性模量以及锚固端约束条件对桥梁极限承载力的影响.研究结果表明:加载方式、吊索的安全系数和锚固端约束条件对该桥极限承载力影响较大,而混凝土收缩和徐变、主梁和索塔的配筋率、主缆的弹性模量对该桥的弹塑性极限承载力影响较小,但对结构刚度影响较明显.更多还原

【Abstract】 In order to study the effects of several influencing factors on ultimate load carrying capacity of self-anchored concrete suspension bridge,the ultimate load carrying capacity of a self-anchored concrete suspension bridge with span of 160 m was analyzed using the elasto-plastic finite element method. The influencing factors include different loading methods,shrinkage and creep of concrete,reinforcement ratio of main girder and tower,safety coefficient of hanger rod,elastic modulus of main cable and restraint of bearing. The results show that the loading method,safety coefficient of hanger rod and restraint of bearing have great effects on the ultimate load carrying capacity,the effects of shrinkage and creep of concrete,reinforcement ratio of main girder and tower,and elastic modulus of main cable are little,but their effects on structural rigidity are much great.更多还原