摘要
通过纤维增强复合材料(FRP)管-钢管约束混凝土组合柱的轴压试验,分析组合柱的受力特点、破坏形态、本构关系和承载力。结果表明:在荷载作用初期,FRP管的约束作用较小;在荷载作用后期,FRP管的环向应力增长较快,故以FRP管的环向断裂作为承载力极限状态指标。将现有理论计算模型与试验所得受约束混凝土的应力-应变关系进行对比,发现空心构件极限应变的理论计算误差较大,而实心构件吻合较好。最后提出了一种可用于确定实心组合柱极限承载力的简化计算方法,理论计算结果与试验值符合较好。
Mechanical properties, failure mode, stress-strain curves and load capacity were analyzed by the axial compression experiments on concentrically compressed fiber reinfoced polymer （FRP） tube-steel tube confining concrete composite columns. The results showed that the function of FRP tube was very small at the loading beginning, and the hoop stress increased quickly at the later loading stage. The load capacity was achieved by hoop rupture of FRP tube. Compared with experimental data, The existing stress- strain model of confined concrete had a great deviation for predicting ultimate strain of hollow composite columns. However, solid composite columns worked well. A simplified calculation method was presented to determine the ultimate loads of solid composite columns, and theoretical results agreed well with experi- mental results.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2011年第5期90-93,99,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
江苏省"333高层次人才培养工程"资助项目
江苏省博士后基金资助项目(0802071C)
关键词
FRP管
钢管
约束混凝土
组合柱
轴压
fiber reinforced polymer （FRP） tube
steel tube
confined concrete
composite column
axial compression
