考虑初应力的大跨度钢管混凝土拱桥极限承载力计算方法研究

Discussion on the Limited Load Capacity Calculate Approach Considering Initial Stress for Large Space Concrete Filled Steel Tubular Arch Bridge

总结了有初应力的钢管混凝土柱承载力的主要计算方法,采用这些计算方法对几座大跨度钢管混凝土拱桥极限承载力进行了分析,结果表明,大跨度钢管混凝土拱桥极限承载力的计算应考虑初应力的影响,其极限承载力的计算可通过等效的、有初应力的钢管混凝土柱来进行。

the calculate approach of limited load capacity of concrete filled steel tube （ CFST ） columns with initial stress was summarized. The limited load capacity was analyzed by this calculate approach for several CFST arch bridges. The results indicate that, the calculation of limited load capacity of CFST arch bridges should considered the effect of initial stress. The calculation of its limited load capacity can be instead of equivalent concrete filled steel tube columns with initial stress.