摘要
大型通用有限元软件ABAQUS既具有强大的非线性分析功能,又有开放的子程序接口供用户根据自己的实际情况进行开发。本文基于用户单元子程序UEL接口,根据ABAQUS隐式动态分析原理推导了速度相关型阻尼器的单元刚度矩阵和单元阻尼矩阵,并利用Fortran语言开发了粘弹性阻尼器和粘滞流体阻尼器这两种速度相关型阻尼器的单元子程序Udamper.for,且实现了阻尼器力-位移滞回曲线与耗能曲线的输出。对一个设置速度相关型阻尼器的钢框架模型,进行了动力时程分析,并与SAP2000的计算结果进行了对比,验证了本程序的准确性及附加阻尼器对建筑结构所具有的减震作用。
Large universal finite element software ABAQUS has powerful nonlinear analysis capabilities, which also allow users to develop programs with its open subroutine interfaces according to their own needs. In this paper, the element stiffness matrices and element damping matrices of velocity-depended dampers are derived based on the user element subroutine UEL interface and the principle of ABAQUS implicit dynamic analysis. The element subroutine （Udamper. for） for two kinds of velocity-depended damper （viscoelastic damper and viscous fluid damper） is developed by Fortran language, with the hysteresis curve and energy dissipation curve output also realized. Dynamic time-history of a steel frame model with velocity-depended dampers is analyzed, and the results are compared with those from SAP2000, which validate the program and the seismic mitigation effect of structure with dampers.
出处
《工程抗震与加固改造》
北大核心
2014年第3期1-6,20,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51274108)
关键词
速度相关型阻尼器
用户单元子程序UEL
动态隐式分析
减震结构
时程分析
velocity-depended damper
user element subroutine UEL
dynamic/implicit analysis
seismic mitigation
time-history analysis
