西南交通大学学报2025，Vol.60Issue(3)：628-638,11.DOI:10.3969/j.issn.0258-2724.20230485
不同强度混凝土填充高强方钢管抗剪性能对比分析
Comparison of Shear Behaviors of Different Concrete-Filled High-Strength Steel Tubes
摘要
Abstract
A total of 16 concrete-filled high-strength steel tube specimens were designed to evaluate the effects of shear-to-span ratio and concrete strength on the shear behavior of concrete-filled high-strength steel tube specimens.The failure mode and shear-displacement curve of the specimens were obtained through the test,and the effects of shear-to-span ratio,core concrete strength,and other parameters on the failure mode,shear-displacement curve,shear-shear strain curve,shear strength,and shear stiffness were compared.The results show that similar to conventional concrete-filled steel tube specimens,the shear-to-span ratio is the key parameter controlling the failure mode of the concrete-filled high-strength steel tube specimens.When the shear-to-span ratio is 0.2 or 0.5,shear failure occurs;when the shear-to-span ratio is 0.8 or 1.0,shear-flexural failure occurs.By implementing ultra-high performance concrete(UHPC),the deformation capacity of the concrete-filled high-strength steel tube specimens(with a shear-to-span ratio of 1.0)is reduced by 61.4%.However,shear strength and stiffness increase by 38.9%and 85.7%,respectively.Additionally,local buckling of the steel tubes is effectively delayed,and the damage degree of the specimens is reduced.The inclination angle of the main diagonal cracks in the core concrete decreases with an increase in the shear-to-span ratio but is not affected by the concrete strength.The average value of tested shear strength/calculated shear strength(Vexp/Vu)is 0.97,with a deviation of 0.03,showing higher accuracy and smaller dispersion.It is considered that the formula can accurately predict the shear strength of concrete-filled high-strength steel tubes.关键词
钢管混凝土/高强钢管/抗剪性能/破坏模式/设计方法Key words
concrete-filled steel tube/high-strength steel tube/shear behavior/failure mode/design method分类
建筑与水利引用本文复制引用
王佳丽,王莹,陈西文,杨东旭,赖志超..不同强度混凝土填充高强方钢管抗剪性能对比分析[J].西南交通大学学报,2025,60(3):628-638,11.基金项目
国家自然科学基金项目(51978170) （51978170）
