| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
The structural performance of damaged open-web type of SRC beam-columns with bolt-connected batten steel plates after retrofitting was experimentally investigated. The experimental parameters are axial load ratio, shear span ratio, and the maximum tip displacement of the columns during the initial loading. First, each column was cyclically loaded to the targeted displacement. Subsequently, the test columns were retrofitted and reloaded. The damaged portions of each column were retrofitted with the polymer cement mortar, and the epoxy resin was injected into the cracks.
The crack width was measured to assess the relation of crack width and the experienced drift ratio. These are valuable to predict the degree of damage from the crack width after an earthquake. Numerical analyses were also conducted to explain the retrofitted column behavior. The effect of strain hysteresis of concrete at first loading was considered for the behavior at second loading.
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