MODEL EXPERIMENTAL TESTS ON INTEGRAL AND GRS INTEGRAL BRIDGES SUBJECTED TO CYCLIC HORIZONTAL LOADS

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  • 繰返し水平載荷を受ける一体橋梁およびGRS一体橋梁のアルミ棒積層体を用いた模型実験

Abstract

This study investigates the phenomenon of increased earth pressure due to thermal expansion and contraction of girders of integral bridges. Model experiments were conducted using aluminum rod–laminate ground to apply cyclic horizontal loading. Normal and GRS (Geosynthetic Reinforced Soil) integral bridges were used for the experiments, and three patterns of cyclic horizontal displacements—only the active side, both the active and passive sides, and only the passive side—were applied to simulate different seasons when the girder was integrated. The experimental results showed that the reinforcement could reduce the increased earth pressure. The earth pressure at the time of displacement of the passive side increased as the ratio of the displacement of the passive side to the displacement of the active side in cyclic loading increased, regardless of whether reinforcement was used.

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