圆CFRP-钢管混凝土受弯构件极限弯矩简化计算  

Simple Calculation on the Ultimate Moment of the Concrete Filled Circular CFRP-Steel Tubular Flexural Members

作　　者：姜桂兰[1] 王庆利[1] 王月[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2期204-207,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金(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;辽宁省高等学校优秀人才技术计划

摘　　要：目的推导圆CFRP-钢管混凝土受弯构件极限弯矩的简化计算表达式以便于工程实践应用.方法以实验研究和理论分析为基础,应用静力平衡法求解,分析计算值偏于安全的情况.结果极限弯矩计算值与试验值吻合较好且偏于安全.结论应用静力平衡法求解圆CFRP-钢管混凝土受弯构件极限弯矩是可行的;除了钢管、混凝土和CFRP的基本物理参数和几何参数之外,纵向CFRP抗拉系数、钢管约束效应系数和CFRP筒约束效应系数等指标对极限弯矩有显著影响;为圆CFRP-钢管混凝土轴压、偏压构件极限承载力的简化计算提供了一个新方法.Based on experimental study and theoretical analysis, simple expression on the ultimate moment of the concrete filled circular CFRP-steel tubular flexural members are derived using static equilibrium method for application in engineering practice. The ultimate moment values predicted check well with those of tests and are on the safe side, and reasons for the ultimate moment values predicted are analyzed somewhat small. Static equilibrium method is suitable for calculating the ultimate moment of the concrete filled circular CFRP-steel tubular flexural members. Tension coefficient of the longitudinal CFRP, confinement factor of the steel tube and the CFRP tube have significant influences on the ultimate moment except for basic physical coefficients and geometrical coefficients of the steel tube, the concrete and the CFRP. Study herein provides a new approach for simple calculation on the ultimate load carrying capacity of the concentrically or eccentrically compressed concrete filled circular CFRP-steel tubular members.

关 键 词：圆CFRP-钢管 内填混凝土 受弯构件 极限弯矩 简化计算 

分 类 号：TU393[建筑科学—结构工程]