基底滞后隔震层对建筑结构随机地震反应的控制

本文应用随机最优控制理论提出了用基底滞后隔震层把大震烈度下多层剪切型结构的地震反应控制在弹性范围内的设计计算方法.文中在建立了基底设置隔震层建筑结构计算模型的基础上,确定了它随机地震反应最优控制的评价函数和可靠性约束;并在应用最优控制论导得基底等价线性耗能器的最优反馈增益的前提下,最终得到了把大震烈度下结构地震反应控制在弹性范围内的基底滞后隔震层最优设计参数的计算公式.

CONTROL FOR EARTHQUAKE RESPONSES OF ARCHITECTURAL STRUCTURES WITH HYSTERESIS ISOLATION SYSTEMS IN BASE

This paper presents a calculation method for designing the hysteresis isolation systems in base, by which the multi-storey shear-type structural responses under large earthquake excitation are controlled in the range of elasticity, using the random optimum control theory. In the paper, the evaluation function and the reliability restrain of optimal control for the random earthquake responses of the structures are deternined by establishing calculation model of the architectural structures with hysteresis isolation systems in base. On the basis of deriving the optimal feedback of the equivalent linear absorbed devices in base by the optimal control theory, finally, the calculating formulas for the optimum design parameters of the hysteresis isolation systems in base, by which the structural responses under large earthquake excitation are controlled in the range of elasticity are obtained.