A multi-span Prestressed-Concrete hollow rigid-frame bridge has been constructed near Mt.Usu as a part of Central Hokkaido Expressway by Japan Highway Public Corporation, which is named as Izumi-no-sawa Bridge. The bridge suffered severe crustal-movements due to eruption of Mt.Usu occurred in March 2000. In this paper, in order to investigate the influence of the crustal-movements on the bridge, static force-displacement analysis is performed by means of 3D elastic finite element method taking geometrical nonlinearity into account. From this study, following results are obtained; 1) the big tensile stress develops in the bridge piers and girders due to crustal-movements: and 2) damaged area of each Reinforced Concrete pier can be estimated by this numerical analysis.
スパン長の異なるH形鋼梁の重錘落下衝撃実験
JSE_62A_999_1010
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