考虑初始弯曲矩形薄壁钢管砼柱管壁屈曲分析

Width-thickness ratio of steel plates in concrete-filled rectangular thin-walled steel tube columns subjected to axis force with initial bending

实际工程中的钢管都是有初始弯曲的，初始弯曲的存在会降低薄壁钢管混凝土柱的承载力．采用能量法对具有初始弯曲管壁的屈曲性能进行了分析，分析结果表明，初始弯曲的存在会使管壁的宽厚比降低30％左右．

Steel pipe has initial bending in actual projects. The existence of initial bending can reduce the bearing capacity of concrete-filled thin-walled steel tube columns. The paper analyzes buckling performance of steel plates with initial bending by energy method, and the result indicates that the existence of the initial bending can reduce width-thickness ratio of steel plates by approximately 30 %.