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

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.