基于多弹簧模型的空间梁柱单元(II):参数分析
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摘要
为模拟地震作用时杆件在变动轴力和双向弯曲的耦合特点,基于简化纤维模型的多弹簧单元模型近年被广泛应用。本文作者在相关论文中提出了考虑剪切变形弹塑性刚度影响的多弹簧模型空间梁柱单元,杆件的计算模拟精度除了取决于单元模型之外,还决定于两个重要参数:弹簧位置及个数布置、塑性区长度,本文将针对其进行参数分析并提出合理建议取值。本文最后还提出了模拟杆件残余应力的合理弹簧布置方式。
To simulate the coupling behavior of member subjected to variable axial force and bi-bending,the multi-spring model is applied widely.Author has presented an improved model which considering the plastic stiff influence of plastic-region shear deformation in other paper.The simulation precision not only depends on the element model but also closely relates to two important parameters: the layout of spring and length of plastic region.Paper focuses on the two parameter analysis and puts forward reasonable suggestions.At last,paper also offers the appropriate spring layout to simulate the residual stress.
To simulate the coupling behavior of member subjected to variable axial force and bi-bending,the multi-spring model is applied widely.Author has presented an improved model which considering the plastic stiff influence of plastic-region shear deformation in other paper.The simulation precision not only depends on the element model but also closely relates to two important parameters: the layout of spring and length of plastic region.Paper focuses on the two parameter analysis and puts forward reasonable suggestions.At last,paper also offers the appropriate spring layout to simulate the residual stress.
引文
[1]方明霁,李国强,孙飞飞.基于多弹簧模型的空间梁柱单元(Ⅰ)—理论模型[J].计算力学学报,2008,25(1):129-133.(FANG Ming-ji,LI Guo-qiang,SUNFei-fei.Multi-spring Model Beam Element(Ⅰ)-The-oretical Model[J].Chinese Journal of ComputationalMechanics,2008,25(1):129-133.(in Chinese))
[2]LI K N,OTANI S,AOYAMA H.Reinforced con-crete columns under varying axial load and Bi-Direc-tion horizontal load reversals[J].Proc Pacific Con-ference on Earthquake Eng,Tokyo-Kyoto,Ⅷ,1988,537-542.
[3]陈以一,沈祖炎.反复变动轴力下钢柱的数值分析模型[J].同济大学学报,1994,22(4).(CHEN Yi-yi,SHEN Zu-yan.Numerical analysis model of steel col-umn under vibration axial force[J].Journal ofTongji Universtiy,1994,22(4).(in Chinese))
[4]刘卫国.钢构件恢复力特性研究[D].同济大学,1990.(LIU Wei-guo.Hysteresis Feature Analysis of SteelMember[D].Tongji Universtiy,1990.(in Chinese))
[2]LI K N,OTANI S,AOYAMA H.Reinforced con-crete columns under varying axial load and Bi-Direc-tion horizontal load reversals[J].Proc Pacific Con-ference on Earthquake Eng,Tokyo-Kyoto,Ⅷ,1988,537-542.
[3]陈以一,沈祖炎.反复变动轴力下钢柱的数值分析模型[J].同济大学学报,1994,22(4).(CHEN Yi-yi,SHEN Zu-yan.Numerical analysis model of steel col-umn under vibration axial force[J].Journal ofTongji Universtiy,1994,22(4).(in Chinese))
[4]刘卫国.钢构件恢复力特性研究[D].同济大学,1990.(LIU Wei-guo.Hysteresis Feature Analysis of SteelMember[D].Tongji Universtiy,1990.(in Chinese))
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