摘要
目的了解圆截面CFRP-钢管混凝土轴压短柱在不同阶段各个组成部分的作用机理和静力性能,以及该类构件承载力简化计算方法.方法以试验为基础,对该类构件开展理论研究.结果给出了混凝土、钢管以及CFRP筒的应力途径;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.结论CFRP-钢管混凝土轴压短柱的应力-应变曲线与钢管混凝土轴压短柱的应力-应变曲线相比的最大特点是在试件达到极限承载力之后,都要经历一个下降段,建议采用极限平衡法求解圆截面CFRP-钢管混凝土轴压短柱的承载力.
Based on the experimental study, mechanical property of the concentrically compressed concrete filled circular CFRP-steel tubular stub columns is analysed. First, mechanization of this kind of structures was analysed according to different stages, and then, stress developments of concrete, steel tube and CFRP tube are given. Second, the stress-strain curve of this kind of structures is determined based on the above-mentioned, and several stages are defined: elastic stage, elastic-plastic stage, strengthening stage and descending stage. The most important distinctive feature of the stress-strain curve, compared with that of the concentrically compressed concrete filled circular steel tubular stub columns, is that there must exist a descending stage after the ultimate load bearing capacity was reached. Third, the simple calculation method of load bearing capacity is studied and the ultimate equilibrium method is recommended.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2005年第3期185-188,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)
辽宁省教育厅青年基金(2004F107)
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
Calculations
Carbon fiber reinforced plastics
Columns (structural)
Concretes
Filling
Mechanical properties
Steel
Tubes (components)
