圆CFRP-钢管混凝土偏压构件荷载-变形关系分析  

Analysis about Load-Deformation Relationship on the Eccentrically Compressed Concrete Filled Circular CFRP-Steel Tubular Members

作　　者：姜桂兰[1] 王庆利[1] 周博[1] 

机构地区：[1]沈阳建筑大学土木工程学院

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第1期81-85,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(1063290-1-003);辽宁省重点实验室专项计划

摘　　要：目的深入了解圆CFRP-钢管混凝土偏压构件的静力性能.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-钢管混凝土偏压构件的荷载-变形关系;分析了长径比和偏心率对圆CFRP-钢管混凝土偏压构件力学性能的影响.结果圆CFRP-钢管混凝土偏压构件荷载-变形关系曲线可以分为三个阶段:弹性阶段、弹塑性阶段和软化阶段.结论计算值与试验值吻合良好且偏于安全.Load-deflection relationship on the eccentrically compressed concrete filled circular CFRP-steel tubular members is analyzed based on experimental study and stress-strain relationship of the concrete confined by circular CFRP-steel tube under axial load using the fiber model approach, and the results predicted check well with that of the test and on the safe side, and this means that the fiber model approach is effective in analyzing load-deflection relationship on the concentrically compressed concrete filled circular CFRP- steel tubular members. Influences of slenderness ratio and eccentricity ratio on static performance of the eccentrically compressed concrete filled circular CFRP-steel tubular members are analyzed too. The feature of load-deflection relationship on the eccentrically compressed concrete filled circular CFRP-steel tubular members is summarized and it can be defined as the following three stages： elastic stage, elasto-plastic stage and softening stage.

关 键 词：圆CFRP-钢管混凝土 偏压构件 荷载-变形关系 纤维模型法 数值模拟 

分 类 号：TU393[建筑科学—结构工程]