| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
A multiple steel pipes bridge pier integrated by pile foundation without a footing has been proposed to design a rational foundation of the bridge pier structure. The proposed substructures possess an excellent advantage of reduction of strain at the column through strain decentralization at footing point. In addition, reduction in footing weight contributes to decrease pile strain. The seismic performance of the proposed bridge pier structure grounded in dry sand and liquefiable sand is evaluated based on the large-scale shaking table tests and numerical simulation. As a result, the proposed structure has advantages of strain reduction of column by strain decentralization at footing point. It is recognized that it has high seismic performance and high toughness in view of the fact that the main members hold a large residual strength after yielding of the shear panels.
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