高强钢筋混凝土框架柱斜向水平受力非线性有限元分析

Nonlinear Finite Element Analysis of High Strength Reinforced Concrete Frame Column under Lateral Bevel Load

为了能够准确地分析高强度钢筋混凝土框架柱在斜向水平受力条件下非线性特点,深入地研究了非线性有限元技术在其中的应用。首先,研究了高强度钢筋混凝土框架柱非线性有限元分析的基本理论。其次,分析高强度钢筋混凝土框架柱材料的本构关系模型,分别选择了混凝土和钢筋的本构关系的数学模型。最后,进行了高强度钢筋混凝土框架柱斜向受力的有限元分析。研究了加载角度和轴压比对框架柱载荷-位移曲线的影响规律,从而找出了框架柱斜向受力的破坏机理。

In order to analyze the nonlinear characteristic of the high strength reinforced concrete frame column under lateral bevel load correctly, the application of the nonlinear finite element technology on it is studied in depth. First, the basic theory of the nonlinear finite element for the high strength reinforced concrete frame column is studied. Second, the mathematical model of the constitutive relationship for the high strength reinforced concrete frame column is analyzed, and the constitutive relationship models of the concrete and reinforcing bar are chosen respectively. Finally, the finite element analysis of it is carried out, and results show the changing rules of load-displacement with the changing of the loading angle and axial-load ratio, and the damaging mechanism of frame column under the lateral bevel load is found out.