曲 哲, 初明进. 转角软化桁架模型与修正压力场理论的比较研究[J]. 工程力学, 2009, 26(3): 36-042.
引用本文: 曲 哲, 初明进. 转角软化桁架模型与修正压力场理论的比较研究[J]. 工程力学, 2009, 26(3): 36-042.
QU Zhe, CHU Ming-jin. COMPARATIVE STUDY OF ROTATING ANGLE-SOFTENED TRUSS MODEL AND MODIFIED COMPRESSION FIELD THEORY[J]. Engineering Mechanics, 2009, 26(3): 36-042.
Citation: QU Zhe, CHU Ming-jin. COMPARATIVE STUDY OF ROTATING ANGLE-SOFTENED TRUSS MODEL AND MODIFIED COMPRESSION FIELD THEORY[J]. Engineering Mechanics, 2009, 26(3): 36-042.

转角软化桁架模型与修正压力场理论的比较研究

COMPARATIVE STUDY OF ROTATING ANGLE-SOFTENED TRUSS MODEL AND MODIFIED COMPRESSION FIELD THEORY

  • 摘要: 以转角软化桁架模型和修正压力场理论为代表的桁架模型是近30年来在研究钢筋混凝土剪扭行为的领域内最重要的成果之一。该文首先详细比较了二者的控制方程,指出其主要区别,然后通过将这两种模型嵌入通用有限元程序,比较了二者在钢筋混凝土梁剪切行为方面的模拟效果。通过比较,指出了修正压力场理论中裂缝检查的不合理性以及混凝土单轴受拉应力-应变关系对模型分析效果的重要影响。最后建议采用一组简单的单轴应力-应变关系。

     

    Abstract: Truss model, such as MCFT (modified compression field theory) and RA-STM (rotating angle-softened truss model), is among the most important developments in analyzing the shear and torsion behavior of reinforced concrete in the past thirty years. The governing equations of these two models are compared in this paper, and major difference is pointed out. By implementing them in general-purpose finite element program, the capability in predicting the shear behavior of reinforced concrete beam is then compared. Results show that the crack check in MCFT is unreasonable, and that the uniaxial concrete tensile stress-strain relationship is of key importance. A set of simple uniaxial stress-strain relationships for concrete and steel reinforcement is recommended.

     

/

返回文章
返回