CFRP-钢管砼轴压短柱受力性能分析  

MECHANICAL PROPERTY ANALYSIS ON AXIALLY COMPRESSED CONCRETE FILLED CIRCULAR CFRP-STEEL TUBE STUB COLUMNS

作　　者：王庆利[1] 王金鱼[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：《工程力学》2006年第8期102-105,149,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50408032);辽宁省自然科学基金资助项目(20031001)

摘　　要：以试验为基础,对CFRP-钢管混凝土轴压短柱的受力性能进行了分析。首先按不同阶段分析了该类构件的作用机理,然后给出了混凝土、钢管以及CFRP筒的应力途径。以此为依据,确定了该类构件典型的应力-应变曲线,并将其划分为若干阶段:弹性阶段、弹塑性阶段、塑性强化段以及下降段;与钢管混凝土轴压短柱的应力-应变曲线相比,CFRP钢管混凝土轴压短柱的应力-应变曲线的最大特点是在达到极限承载力之后,都要经历一个下降段。探讨了该类构件承载力的简化计算方法,并建议采用极限平衡法求解。Mechanical property of axially compressed concrete filled circular CFRP-steel tube stub columns is analyzed based on experimental results. The working mechanisms of the composite column at different stages are analyzed and the stress paths in concrete, steel and CFRP are given. The stress-strain relationship of the axially loaded composite column is then determined, which is divided into 4 stages： elastic, elasto-plastic, strengthening and softening. Compared with that of concrete filled circular steel tube stub column, the axial stress-strain relationship of the composite column investigated exhibits an obvious strain softening after the peak strength is reached. The simplified analysis methods of ultimate strength are finally discussed and the method of limit equilibrium is recommended.

关 键 词：圆CFRP-钢复合管 约束混凝土 轴压短柱 本构关系 简化计算方法 

分 类 号：TU375[建筑科学—结构工程]