基于Prager硬化的钢管混凝土非线性梁单元

英文篇名：Nonlinear beam element for concrete filled steel tube based on Prager's hardening law
中文刊名：地震工程与工程振动
英文刊名：Earthquake Engineering and Engineering Vibration
作者：赵灿晖
英文作者：Zhao Canhui~(1 ; 2)(1.School of Civil Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China ; 2.Sohool of Civil Engineering ; Chongqing Jiaotong University ; Chongqing 400074 ; China)
中文关键词：有限元 ; 非线性分析 ; Prager硬化规则 ; 钢管混凝土
英文关键词：finite element ; nonlinear analysis ; Prager's hardening law ; concrete filled steel tube
出版日期：2006-12-30
机构：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
年：2006
期：06
出版单位：地震工程与工程振动

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。
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.

引文

[1]Fard isM N.M ember-type mothods for the non linear seism ic response analysis of reinforced concrete srructure.Experim ental and num ericalm ethodsin earthquake engneering[C].Printed in Newtherliand,1991:10~21.
    [2]L iew JY R,Chen H,Shanmugam N E,et al.Improved non linear plastic h inge analysis of space fram e structures[J].Engineering Structures,2000,22:1324~1338.
    [3]Enrico Spacone and F ilip.F ibre beam-Column model for non linear analysis of R/C fram es[J]:Part I.Eaethquake Egineering and Structure Dy-nam ics,1996,25:711~725.
    [4]韩林海.钢管混凝土结构[M].北京:科学出版社,2000.
    [5]韩林海.钢管混凝土框架结构理论分析方法的初步研究[J].哈尔滨建筑大学学报,1997,(3):22~27.
    [6]David A.Pecknold.Inelastic structure response to 2d ground motion[J].ASEC,EgineeringM echan ics,1994,100(5):949~961.
    [7]汪梦甫.钢筋混凝土高层空间框架非线性地震反应分析[J].湖南大学学报,1998,(3):64~69.
    [8]王勖成,邵敏.有限单元法基本理论和数值方法[J].北京:清华大学出版社,1997.
    [0]徐秉业,陈灿章.塑性力学简明教程[M].北京:清华大学出版社,1981.
    [10]韩林海,陶忠.钢管混凝土圆钢管混凝土构件弯矩曲率滞回特性研究[J].地震工程与工程振动,2000,20(3):50~59.