钢管混凝土哑铃型截面构件扭转试验及抗扭刚度分析

分析了钢管混凝土哑铃型截面构件的约束扭转试验及抗扭刚度参数，结果表明，钢管混凝土哑铃型截面构件有较好的扭转弹塑性；增加腹腔宽度可增强哑铃形构件的抗扭性能，增加截面高度对于增强构件抗扭承载力影响不大；哑铃型截面抗扭刚度为钢管、管内混凝土、腹腔混凝土三部分抗扭刚度之和，腹腔混凝土抗扭刚度所占比重较小，可以忽略.

Torsion Test and Torsional Rigidity Analysis of Member of Dumbbell-shaped Cross-section Made by Concrete Filled Steel Tube

Analyzing parameters of constraint torsion test and torsional rigidity of members of dumbbell-shaped cross-section made by concrete filled steel tube,The experiment and analysis results show that the members put up preferable torsion elastic-plasticity,torsion resistance ability can be enhanced by widening the width of enterocoelia of dumbbell-shaped members,adding depth of section has little influence on enhancing torsion resistance bearing capacity,the torsional rigidity is the sum of the torsional rigidity of steel pipe,concrete in tube and abdominal concrete,and the torsional rigidity of abdominal concrete can be ignored.