CFRP-钢管砼轴压短柱承载力的简化计算  

Simplified Strength Calculation of the Concentrically Compressed Concrete Filled CFRP-Steel Tubular Stub Columns

作　　者：王庆利[1] 赵春雷[1] 张海波[1] 张永丹[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）》2005年第6期612-615,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金(50408032);辽宁省自然科学基金(20031001);辽宁省教育厅科研项目计划青年基金(2004F107)

摘　　要：目的为得到CFRP-钢管砼轴压短柱承载力计算的表达式.方法合理假定CFRP筒、钢管和核心混凝土在极限时的应力状态,采用极限平衡法求解,并以实验结果加以验证.结果得到承载力计算式以及简化式,计算结果与实测结果吻合良好.结论在所选取样本的参数范围内,CFRP-钢管砼轴压短柱承载力主要取决于核心混凝土的强度和横截面积、钢管的强度和横截面积以及CFRP筒的强度和横截面积,承载力随着它们的增加而增加.如果没有外包CFRP筒,则计算式退化为圆截面钢管混凝土轴压短柱承载力极限平衡法的表达式.In order to calculate the concentrically compressed concrete filled CFRP-steel tubular stub columns strength, the ultimate equilibrium method is adopted based on the assumption that the stresses of CFRP tube, steel tube and core concrete are under ultimate condition. The strength calculation expression and the simplified expression are obtained and the results of the calculation match that of the test well. Calculation indicates that within the parameter scope of the specimen used in the test, the concentrically compressed concrete filled CFRP-steel tubular stub columns strength depends mainly on the strength and cross-sectional area of the core concrete, and on that of the steel tube and the CFRP tube as well. The strength will increase with the increase of these 6 factors. If there is no CFRP tube, the expressions mentioned in this paper would change to that of the concentrically compressed concrete filled circular steel tubular stub columns based on the ultimate equilibrium method.

关 键 词：CFRP-钢管 约束混凝土 轴压短柱 承载力 极限平衡法 约束效应系数 简化计算 

分 类 号：TU393[建筑科学—结构工程]