混凝土的应力应变关系

• 作 者: 曹居易
• 出 处: 四川建筑科学研究
• 发表日期: 1979年01期
• 关键词: 混凝土 应力应变曲线 应力应变关系 恢复力特性 内力重分布 受力阶段 超静定结构 分布变化规律 受弯构件 压弯构件

一、概述 混凝土的应力应变关系,是研究钢筋混凝土强度、裂缝和变形理论的重要依据之一。例如,压弯构件受压区的混凝土在各受力阶段的应力分布变化规律,受弯构件的挠度或变形,超静定结构内力重分布的特性,塑性铰的极限转角,以及构件的恢复力特性和延性等,都同混凝土的应力应变曲线有密切的关系。特别是近十多年来,采用有限元法,对钢筋混凝土结构进

I. INTRODUCTION The stress-strain relationship of concrete is one of the important bases for studying the strength, crack and deformation theory of reinforced concrete. For example, the stress distribution of the concrete in the compression zone of the compression zone in each stress stage, the deflection or deformation of the bent component, the redistribution characteristics of the statically indeterminate structure, the limit rotation of the plastic hinge, and the restoring force of the component. Characteristics and ductility are closely related to the stress-strain curve of concrete. Especially in the past ten years, the finite element method has been used to advance reinforced concrete structures.