既存建物上部への増築を利用した耐震補強システムのための増築層剛性設計法

概要

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The objective of this paper is to propose a stiffness design method of additional storys of new seismic reinforcement system for existing multi-story building. The seismic reinforcement system consists of an additional single or multi-story building structure and an isolation story with appropriately tuned isolators and dampers. Then the system enables one to increase seismic performance of existing building with small or no structural reinforcement to existing part of the building. In this paper, proposed is an optimum stiffness design method of the isolation story based on a classical theory for tuned mass damper and a stiffness design method of addtional story(s) via hybrid inverse problem formulation. Several numerical examples are shown to demonstrate validity of the proposed design method. Elasto-plastic time history analyses under recorded earthquakes are performed to demonstrate efficiency of the proposed system.
2007-01-30