摘要
隔震性能评价是并联基础隔震研究的重要内容，在多目标优化的理论框架下，进行了并联基础隔震体系地震反应优化研究。隔震反应目标包括上部结构最大层间剪力和隔震层最大位移，隔震层决策变量为屈服系数、名义周期和阻尼比。优化的约束条件为上部结构层间剪力不均匀系数在0．85—1．00之间。针对一特定结构，通过NSGA—Ⅱ算法分别进行有约束和无约束条件下的多目标优化研究。研究给出了并联基础隔震多目标优化Pareto最优前沿的一般特征及相关量之间的关系。
Performance estimation is an important aspect in resilient-friction base isolation research. Multi-objective optimization of seismic responses in R-FBI system is performed in this paper. The seismic responses include the maximum story shear force of structures and the maximum drift of isolation layer. The decision variables are yielding coefficient, nominal cycle and damping coefficient. Constraint in the optimization is that asymmetry coefficient of the story shear in structures lies in 0.85 - 1.00. Constraint and unconstraint multi-objective optimization for a special R-FBI structure are performed using NSGA-ⅡAlgorithm. Characteristics of Pareto front of the optimization are given, and relations between seismic responses and isolation layer parameters are analyzed.
出处
《华东交通大学学报》
2009年第2期38-41,共4页
Journal of East China Jiaotong University
关键词
并联基础隔震
多目标优化
NSGA-Ⅱ算法
resilient-friction base isolation
multi-objective optimization
NSGA- Ⅱ Algorithm
