【作者】 于峰； 牛获涛； 王忠文； 刘万里；

【Author】 YU Feng NIU Di-tao WANG Zhong-wen LIU Wang-li (Scherzi of Civil Engineering,Xi’an University of Architecture and Technology Xi’an Shannxi 710055)

【机构】 西安建筑科技大学土木工程学院；

【摘要】 约束混凝土柱可以有效的提高混凝土柱的承载力和延性.本文通过对已有试验研究结果的分析,指出 FRP 约束钢管混凝土柱的承载力主要与 FRP 对钢管混凝土柱的约束效应系数ζ_f、非约束混凝土的抗压强度和钢管的厚度有关.根据弹性理论方法,采用等效换算截面,以ζ_f 为主要参数,提出了 FRP 约束钢管混凝土柱承载力计算公式.该公式计算结果与已有试验数据吻合较好.更多还原

【Abstract】 External confinement is an efficient technique to increase the bearing capacity and ductility of con- fined-concrete column.According to the analysis of existing experimental data,it can be concluded that the beating capacity of FRP-confined concrete filled steel tubes is mainly related to the modified confinement ra- tio ξ_fof FRP to concrete filled steel tubes,compressive strength of unconfined concrete column and the thick- ness of steel tubes.Based on the method of elastic theory,the equivalent conversion section is adopted;taking ξ_f as main parameter,the calculating formula of the beating capacity for FRP- confined concrete filled steel tubes is proposed.The predictions of the proposed formula agree well with test data.更多还原