CFRP钢管混凝土核心轴压短柱静力性能研究  

Static property study on concentrically compressed stub concrete columns reinforced by concrete filled CFRP-steel tube

作　　者：王庆利[1] 赵春雷[1] 武斌[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：《辽宁工程技术大学学报（自然科学版）》2006年第1期51-53,共3页Journal of Liaoning Technical University (Natural Science)

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);辽宁省教育厅青年基金资助项目(2004F107)

摘　　要：为了了解CFRP钢管混凝土核心轴压短柱的静力性能,对8根CFRP钢管混凝土核心轴压短柱和用于对比的4根钢管混凝土核心轴压短柱进行静力试验,分析此类构件的载荷-纵向应变关系,并初步探讨约束效应系数对此类构件承载力的影响。研究结果表明:由于CFRP的存在,试件在屈服之后,承载力并不马上下降,而变形却经历一段持续增长;在其他条件相同的情况下,ξcf或ξs越大,CFRP钢管混凝土核心轴压短柱的承载力越大,且承载力的增长与ξcf或ξs的增加基本呈线性关系,但约束效应系数的增加对提高CFRP钢管混凝土核心轴压短柱承载力的效果并不显著。Based on the slow tests on 8 concentrically compressed stub concrete columns reinforced by concrete filled circular CFRP-steel tube and 4 concentrically compressed stub concrete columns reinforced by concrete filled circular steel tube, the static property and load-longitudinal strain relationship of the concentrically compressed stub concrete columns reinforced by concrete filled circular CFRP-steel tube were analysed, and the influences of confinement factors on strength capacity were discussed. It is found that within the factors scope of this test, strength capacity does not decrease immediately while deformation continues after yielding due to the existence of CFRP tube. Under the condition that other factors are the same, the larger ξcf or ξs, the larger the strength capacity, and the increasing of strength capacity is nearly proportional to that of ξcf or ξs, but the increasing of ξcf or ξs has not obvious influences on that of strength capacity.

关 键 词：CFRP钢管混凝土核心柱 轴压短柱 静力性能 钢管约束效应系数 CFRP简约束效应系数 

分 类 号：TU393[建筑科学—结构工程]