【摘要】 通过对22根薄壁离心钢管混凝土构件抗扭性能试验数据的研究,提出了该结构受扭破坏的三个阶段的概念;在钢管和混凝土现有规范计算方法的基础上,建立了组合构件弹性扭矩、塑性扭矩的简化公式;以钢管的空心率、含钢率、长细比为参数,提出了构件组合模量表达式,并且采用与国际有关研究、国内相关规范相一致的直接双直线法,建立了组合刚度及组合构件抗扭各阶段的变形计算方法,并进行了扭转全过程简化计算,结果与试验结果吻合良好.更多还原

【Abstract】 The realsize experiment on 22 centrifuge concrete filled thinwalled steel tubes demonstrated that three phases of distinct features can be observed in the process of destruction when the tube is under torsion. On the basis of the theories obtained from the previous related researches and the test data, an analytical method for the elastic torsion and the plastic torsion of composite members is proposed; the module expressions for composite members are obtained with the related parameters; then an analytical method for the deformation in each phase is deduced through the internationally widelyused mode.更多还原