| 基于Prager硬化的钢管混凝土非线性梁单元 |
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| 引用本文： | 赵灿晖.基于Prager硬化的钢管混凝土非线性梁单元[J].地震工程与工程振动,2006,26(6):127-132. |
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| 作者姓名： | 赵灿晖 |
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| 作者单位： | 西南交通大学,土木学院,四川,成都,610031;重庆交通大学,土木学院,重庆,400074 |
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| 基金项目： | 重庆市教育委员会科研计划项目 |
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| 摘 要： | 根据三类钢管混凝土构件的荷载位移曲线论述了Prager硬化规则应用于钢管混凝土材料非线性分析的合理性,由随动硬化材料屈服面方程的全微分出发,采用塑性势理论推导了钢管混凝土梁单元的非线性刚度矩阵。建立了钢管混凝土梁单元的初始屈服面方程,由Prager硬化规则建立了后继屈服面方程,并推导了屈服面移动量的计算公式。根据钢管混凝土的特点,探讨了确定硬化参数的方法。算例的结果有良好的精度。
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| 关 键 词： | 有限元 非线性分析 Prager硬化规则 钢管混凝土 |
| 文章编号： | 1000-1301（2006）06-0127-06 |
| 收稿时间： | 2006-01-18 |
| 修稿时间： | 2006-01-182006-04-08 |
Nonlinear beam element for concrete filled steel tube based on Prager's hardening law |
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| Zhao Canhui.Nonlinear beam element for concrete filled steel tube based on Prager''''s hardening law[J].Earthquake Engineering and Engineering Vibration,2006,26(6):127-132. |
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| Authors: | Zhao Canhui |
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| Institution: | 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Sohool of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074 ,China |
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| Abstract: | The reasonability of applying Prager's hardening law to the nonlinear analysis of concrete filled steel tube(CFST) is discussed on the basis of 3 kinds of CFST members' load-displacement relation.Beginning with the total differential of kinematics hardening yield function,the CFST beam element stiffness matrix is deduced form the plastic potential theory.The initial yield function of a CFST beam element is developed.The subsequent yield function is obtained from the Prager's hardening law and the formula of yield surface movement is founded.The calculation of hardening parameters is discussed according to the characteristics of CFST.The calculation results show full agreement with the experimental data. |
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| Keywords: | finite element nonlinear analysis Prager's hardening law concrete filled steel tube |
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