中文摘要：

采用有限元软件ABAQUS对钢管自应力混凝土柱抗剪性能全过程进行分析,计算得到的试件荷载-位移曲线、抗剪承载力与相关试验结果对比吻合较好.在此基础上,研究了钢管自应力混凝土柱抗剪时的破坏形式以及自应力对钢管混凝土柱抗剪承载力的影响.结果表明剪跨比会改变其抗剪时的破坏形式,剪跨比λ〈0.4时,试件具有剪切破坏特征,λ〉0.4时,试件具有弯曲破坏特征,λ=0.4时,试件兼具剪切破坏和弯曲破坏特征;钢管自应力混凝土柱抗剪承载力比普通钢管混凝土柱抗剪承载力高,且抗剪承载力随自应力增大而提高,提高幅度与剪跨比有关,当剪跨比λ〈0.4时,自应力对抗剪承载力影响较大,当剪跨比λ≥0.4时,自应力对抗剪承载力影响较小.

英文摘要：

The mechanical properties of self-stressing concrete filled steel tube columns under shear load are analyzed by using the finite element software ABAQUS. The predicted results agree well with the experi- mental results. The failure modes under shear load and the effect of the self-stressing on the shear strength are studied. The study results show that the shear span ratio will change the failure mode. When the shear span ratio is less than 0.4, the test specimens failed because of shear. When it is more than 0.4, test spec- imen failed because of bending. When it is equal to 0.4, test specimen failed because of both shear and bending. The shear strength would improve with the self-stressing; the effect of improving related to the shear span ratio. When the shear span ratio is less than 0.4, self-stressing has significant effect on the shear strength; otherwise, self-stressing has little effect on the shear strength.