混凝土应力应变上升段曲线的一个最佳模式  

An Excellent Model of the Ascending Branch of the Stress-Strain Curve for Concrete

作　　者：袁发顺[1] 胡夏闽[1] 

机构地区：[1]南京建筑工程学院建工系

出　　处：《南京建筑工程学院学报》1995年第4期1-7,共7页Journal of Nanjing Architectural and Civil Engineering Institute(Natural Science)

基　　金：江苏省应用基础研究计划资助

摘　　要：从分析混凝土单向受压应力应变曲线（σ～ε曲线）所具有的特征出发，指出了能反映出这些特征的混凝土σ～ε曲线方程的一阶导数，即切线模量所必须具有的特征。提出了混凝土单向受压σ～ε曲线方程必须满足的两个新条件，进而指出了在混凝土非线性分析中广泛应用的Ｓｅａｎｚ公式存在的问题。并从假定混凝土单向受压切线模量表达式这一新角度出发，得出了一个新的混凝土单向受压σ～ε上升段曲线，该曲线包含了混凝土单向受压试验所表现出的几乎所有特征。By analysing the features of the stress-strain curve for concrete in uniaxialcompression, the authors propose several characteristics which one ordel derivative(that is,tangent modulus)of σ￣εcurve equation with those features must have.At the same time,the authors point out two new conditions which the σ￣ε curve equation must satisfy and theerrors of Seam's stress-strain curve which is widely used in the nonlinear analysis of reinreinforced concrete structures. By assuming the tangent modulus equation of concrete in uniaxialcomperssion, a new σ￣ε ascending branch curve is reached, which can reflect all featuresshowed in uniaxial compressive test of concrete.

关 键 词：混凝土结构 应力应变关系 模量 力学性能 

分 类 号：TU375.01[建筑科学—结构工程]