摘要
为研究矩形钢管混凝土构件的剪切性能,建立矩形钢管混凝土构件受剪的有限元模型,并采用现有的试验数据对该模型进行验证。利用该模型进行机理分析和参数分析,分析剪应力的分布规律,并分析截面高宽比、截面尺寸和约束效应系数对核心混凝土抗剪强度的影响规律。研究结果表明:钢管的剪力主要由钢腹板承担;随着钢管约束效应系数的增大,核心混凝土的抗剪强度明显提高;截面高宽比和截面尺寸不影响核心混凝土的抗剪强度。在参数分析和机理分析的基础上建议了矩形钢管混凝土构件抗剪承载力的简化计算公式。
In order to study the shear property of rectangular concrete-filled steel tubular （CFST） specimens, the finite element （FE） model which was verified by the present test data was deve- loped. The model was used to perform mechanism and parameter analysis. The shear stress distribu- tion was analyzed. Meanwhile, the effects of the aspect ratio of section, the section size and the steel tube confinement factor on the shear strength of the core concrete were analyzed. The research results showed that the shear of the steel tube was mainly undertaken by the steel web ; with the in- crease of the steel tube confinement factor, the shear strength of the core concrete was significantly improved; and that the aspect ratio and the size of section did not affect the shear strength of the core concrete. Based on the mechanism and parameter analysis, the simplified formulas of bearingcapacity for the shear strength of rectangular CFST specimens were proposed.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2013年第1期28-35,共8页
Journal of Guangxi University（Natural Science Edition）
基金
福建省自然科学基金资助项目(2012D075)
福建省教育厅面上项目(JA11022)
福州大学人才引进基金资助项目(XRC-1134)
关键词
矩形
钢管混凝土
剪切性能
高宽比
有限元
剪应力
简化计算公式
rectangular
CFST
shear property
aspect ratio
finite element （FE）
shear stress
simplified formulas
