摘要
为了提高子结构试验技术对非线性结构的稳定性,把无条件稳定的能量守恒逐步积分方法实施于子结构试验中,提出基于该逐步积分方法的子结构试验方法(以下简称能量守恒子结构试验方法)。在试验方法中采用等效力控制方法求解隐式差分方程。在试验流程图中提出模块CR的计算方法,从而解决了能量守恒方法实施于子结构试验的关键问题。然后对单自由度线性结构和非线性结构的能量守恒子结构试验进行数值仿真,结果表明提出的试验方法是可行的。最后实现了线性弹簧试件、非线性防屈曲支撑试件的能量守恒子结构拟动力试验,试验结果进一步证明了该试验方法对线性结构和非线性结构都是可行的。
In order to expand the stability of substructure testing to nonlinear structures, the unconditional stable energy-conserving time integration algorithm is implemented in the substructure test, and a substructure testing method based on the algorithm, called energy-conserving substructure testing method, is developed. The equivalent force control method is used to solve implicit difference equation in the testing method. The computation of module CR is presented in the block diagram of test, which solves the key problem in the implementation of energy-conserving time integration algorithm in substructure tests. Then numerical simulations of energy-conserving substructure tests of SDOF linear and nonlinear structures were carried out. The results validate the feasibility of energy-conserving substructure testing method. Finally energy-conserving substructure pseudodynamic tests were conducted with linear spring and nonlinear buckling-restrained brace specimen respectively. The results show that the energy-conserving substructure testing method is applicable for both linear and nonlinear structures.
出处
《工程力学》
EI
CSCD
北大核心
2010年第1期1-7,共7页
Engineering Mechanics
基金
国家自然科学基金项目(90715036
50578047)
地震行业科研专项经费项目(20084190731)
关键词
子结构试验
能量守恒逐步积分方法
等效力控制方法
防屈曲支撑
拟动力试验
稳定性
substructure test
energy-conserving time integration algorithm
equivalent force control method
buckling-restrained brace
pseudodynamic test
stability
