摘要
目的为了解CFRP钢管混凝土核心轴压短柱的各组成部分协同工作,内力重分布,应力-应变关系以及承载力简化计算等问题.方法以试验研究为基础,对研究对象进行理论分析.结果试件在受力过程中存在内力重分布现象:在加载初期,钢管以承受纵向压力为主;在加载后期,钢管和CFRP筒以承受环向拉力为主,给出了此类构件的应力-应变关系曲线以及承载力计算表达式.结论在达到最大承载力之前,钢管,主筋和外围混凝土能够保持协同工作;根据CFRP筒约束效应系数的不同,可以将应力-应变关系曲线划分为若干阶段;计算值与实测值吻合良好且偏于安全.
Based on the experimental study, static performances of the concentrically compressed stub columns reinforced by concrete filled CFRP-steel tube are analyzed in order to understand the cooperation, inner forces redistribution, stress-strain relationship and strength calculation expression of them. It has been found that steel tube, main steel bar and outer concrete can cooperate before the maximum bearing capacity is reached;inner forces redistribution takes place during loading;steel tube takes longitudinal load mainly at first and then steel tube and CFRP tube take circumferential force mainly; the stress-strain relationship curves of this kind of members is given for the first time and several stages are defined according to CFRP tube confining factor;strength calculation expression is given, and calculation results check well with those of tests and are on the safe side.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2005年第4期289-292,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(50408032)
辽宁省自然科学基金(20031001)
辽宁省教育厅科学计划项目青年基金(2004F107)
关键词
CFRP钢复合管
内填混凝土
轴压短柱
协同工作
内力重分布
应力-应变
关系
承载力计算式
CFRP-steel composite tube, concrete filled, concentrically compressed stub columns, coopera-tion, inner forces redistribution, stressstrain relationship, strength calculation expression
