懸垂型免震構造の適用性に関する一考察

Abstract

A suspension type energy absorber system was proposed in this paper for use in the design of highway bridge structures, in order to prevent catastrophic failures as had been seen in the Hyogoken-Nanbu Earthquake. The eigen frequency of the proposed system was first examined through theoretically determined closed form solutions. Dynamic response analyses were then carried out by use of one-dimensional mass-spring systems for a few different types of bridge structure, including currently used conventional laminated rubber type absorber to be compared. It was concluded that the proposed absorber system can be one of practically useful measures to dissipate excessive energy accumulated in the structure during earthquake, though several points are still remained to be solved in the actual design.