摘要
对于大跨度的空间桁架结构,准确模拟非线性状态后的力学行为非常重要.基于UL法的增量微分方程,详细推导了空间桁架单元考虑几何非线性的高阶刚度矩阵,通过OpenSees开放平台,开发了高阶非线性桁架单元,给出了单元的实现方式、静力和动力计算的TCL命令流程和迭代过程的非线性算法,通过几种桁架结构的非线性静力和地震作用下的非线性动力对比分析,表明采用本文方法实现的单元能够准确模拟桁架结构的强非线性性能.
For long - span space truss structures, it was very important to accurately simulate the nonlinear performance. Based on the increment of UL method of differential equation, the stiffness matrix of the space truss considering geometric nonlinear was deduced. The high order nonlinear truss element was developed in the OpenSees platform. The realization of the element, the static and dynamic calculation of TCL command flow and the nonlinear algorithm of iterative process were put forward. Several kinds of truss structure under the action of nonlinear static and seismic nonlinear dynamic analysis were carried out. And the results showed that the element could reflect the strong nonlinear behavior of trusses.
作者
张俊峰
高健利
ZHANG Junfeng GAO Jianli(School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)
出处
《郑州大学学报（工学版）》
CAS
北大核心
2016年第6期63-67,共5页
Journal of Zhengzhou University（Engineering Science）
基金
河南省科技攻关计划项目(142102310345)
