圆CFRP-钢管混凝土轴压短柱荷载-变形关系分析  

Analysis about Load-Deformation Relationship on the Concentrically Compressed Concrete Filled Circular CFRP-Steel Tubular Stub Columns

作　　者：朱贺飞[1] 王庆利[1] 刘洋[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第1期86-90,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金资助项目(50408032);辽宁省教育厅科学技术计划重点实验室项目(20060690);沈阳市科学技术计划项目(1063290-i-003);辽宁省重点实验室专项计划

摘　　要：目的深入了解圆CFRP-钢管混凝土轴压短柱的静力性能.方法以试验研究为基础,依据圆CFRP-钢管约束混凝土在轴压力作用下的应力-应变关系,采用纤维模型法模拟圆CFRP-钢管混凝土轴压短柱的荷载-变形关系;分析了钢管约束效应系数和CFRP筒约束效应系数对圆CFRP-钢管混凝土轴压短柱力学性能的影响.结果计算值与试验值吻合良好且偏于安全.结论总结了典型的圆CFRP-钢管混凝土轴压短柱荷载-变形关系曲线特点,该曲线可以分为4阶段:弹性阶段、弹塑性阶段、塑性增强阶段和软化阶段;该方法也可用于圆钢管混凝土轴压短柱的荷载-变形关系分析.Load-deformation relationship of the concentrically compressed concrete filled circular CFRP-steel tubular stub columns is analyzed based on experimental study and stress-strain relationship of the concrete confined by circular CFRP-steel tube subjected to axial load using the fiber model approach. It shows that the results predicted check well with that of the test and on the safe side. Influences of the steel tube confinement factor and the CFRP tube confinement factor on the concentrically compressed concrete filled circular CFRP-steel tubular stub columns are analyzed too. The typical load-deformation relationship Curves of the concentrically compressed concrete filled circular CFRP-steel tubular stub columns are given, and it could be defined as following four stages： elastic, elasto-plastic, strengthening and softening stage. The method presented here is suitable for load-deformation relationship analysis of the concentrically compressed concrete filled steel tubular （CFST） stub columns with circular cross-section too.

关 键 词：圆CFRP-钢管约束混凝土 轴压短柱 荷载-变形关系 纤维模型法 

分 类 号：TU393[建筑科学—结构工程]