摘要
利用仿真技术分析研究了具有随机本构参数的混凝土框架结构的地震反应 ,提出二重随机模拟的概念 ,建议了一类随机结构非线性随机模拟算法。研究结果表明 :当考虑混凝土本构关系的固有离散性时 ,混凝土结构的地震响应会出现大幅度的随机涨落行为。这种随机涨落对于结构的内力分布具有显著影响 ,进而导致结构塑性铰分布的不可精确预测特征。对于复杂结构的分析 ,应注意混凝土材料本构关系随机性的影响。
The simulation on the earthquake nonlinear response for stochastic structures is studied in the paper.A concept on duplicate random simulation is put forward.It means that the samples of stochastic structures are built in two stages.At the same time,a kind of algorithm for stochastic non-linear simulation of structures is proposed.A reinforced concrete frame structure with three spans and eight stories is analyzed.It is used to demonstrate the effects of random parameters on the constitutive curves of concrete.The effects show that the earthquake response of the structure behaves great variation.
出处
《土木工程学报》
EI
CSCD
北大核心
2003年第2期52-57,共6页
China Civil Engineering Journal
基金
国家自然科学基金资助课题 (1 9772 0 34)
关键词
随机结构
非线性
地震反应
仿真分析
混凝土结构
框架结构
stochastic structure,simulation non-linear analysis,stratified sampling technique,duplicate stochastic simulation,dynamic analysis
