【作者】 吴刚； 吕志涛； 吴智深；

【Author】 Gang Wu~1 Zhitao Lv~1 Zhishen Wu~2 (1 College of Civil Engineering Southeast University Nan Jing 210096 PR China) (2 Department of Urban & Civil Engineering Ibaraki University Hitachi 316-8511 Japan)

【机构】 东南大学土木工程学院； 日本茨城大学都市系统工学科；

【摘要】 本文对FRP约束混凝土圆柱和矩形柱的性能进行了较系统的研究。研究表明,FRP约束混凝土圆柱后的应力-应变关系曲线可能有软化段,也可能没有软化段。本文建议了FRP约束混凝土圆柱无软化段时极限强度、极限应变的计算公式及应力—应变关系三折线模型。提出了FRP约束圆柱体有软化段时峰值应力、峰值应变、极限应力和极限应变的计算方法及应力-应变关系模型。另外,分析了FRP约束混凝土矩形柱的特点,建议了FRP约束混凝土矩形柱转折点应力、应变、极限应力和极限应变的计算公式。更多还原

【Abstract】 Performances of FRP-confined concrete circle and rectangular columns are systematically studied. The stress-strain curves of FRP-confined circle columns may have strain-softening response or not. The methods for predicting the ultimate strength and axial strain as well as the tri-linear models for predicting the stress-strain curves of FRP-confined circle columns with strain-hardening response are suggested. The models for calculating the maximum stress, peak strain, ultimate stress and ultimate strain as well as three models for predicting the stress-strain curves of FRP-confined circle columns with strain-softening response are put forward. In addition, the characteristics of FRP-confined rectangular concrete columns are analyzed, and the equations for predicting the transition stress, transition strain, ultimate stress and ultimate strain are presented.更多还原