Activity seismic-response control of structures integrating base isolation systems

本文主要研究了将半主动可控变摩擦阻尼器集成到基础隔震系统中的结构设计方法。这些可变摩擦阻尼器只控制它们的滑移力水平，从而表现出类似形状的滞回，因此它们可以被称为“可变滑移力水平阻尼器”。利用基础隔震结构的运动特性，提出了相对简单的控制算法，即基础隔震结构之上的楼板的加速度反应几乎相同，特别是在严重地震的情况下。基于这种控制算法的基础隔震结构在地震作用下表现出良好的隔震性能。这些主动控制结构具有以下有益的特点：(1)只能根据基础隔震结构的加速度响应进行控制；(2)即使基础隔震结构的实际动力特性与设计阶段的预期基本不同，也可以提供鲁棒控制。此外，本文还研究了在中间层设置半主动控制基础隔震系统的总体设计方法和整个建筑结构。

A design methodology for structures integrating semiactively-controlled variable friction dampers into base isolation systems is mainly focused on in this research. These variable friction dampers control only their slip-force levels in such a way as to exhibit hystereses having the similar shapes, and therefore they can be referred to as "variable slip-force level dampers."Relatively simple control algorithm has been proposed utilizing the motion characteristics of base-isolation structures that the acceleration responses of the floors above the base isolators are almost the same each other, in particular for the case of severe earthquake. Base isolation structures incorporating the dampers based on such a control algorithm have been demonstrated to give a good performance in seismic event. These actively-controlled structures have the following beneficial characteristics: (1) Control can be conducted only based on the acceleration response of the base isolators; and (2) Robust control can be provided even if the actual dynamical characteristics of the base isolators are more or less different from the one expected in the design stage.In addition, the total design methodology for and entire building structure having the proposed semiactively-controlled base isolation system in the middle story is investigated.