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논문 기본 정보

자료유형
학술저널
저자정보
Mostafa Fakharifar (Missouri University of Science and Technology) Genda Chen (Missouri University of Science and Technology) Ahmad Dalvand (Lorestan University) Anoosh Shamsabadi (California Department of Transportation)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.9 No.3
발행연도
2015.9
수록면
345 - 367 (23page)

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초록· 키워드

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Past earthquakes have signaled the increased collapse vulnerability of mainshock damaged bridge piers and urgent need of repair interventions prior to subsequent cascading hazard events, such as aftershocks, triggered by the mainshock (MS). The overarching goal of this study is to quantify the collapse vulnerability of mainshock damaged substandard RC bridge piers rehabilitated with different repair jackets (FRP, conventional thick steel and hybrid jacket) under aftershock (AS) attacks of various intensities. The efficacy of repair jackets on post MS resilience of repaired bridges is quantified for a prototype two span single column bridge bent with lap splice deficiency at column footing interface. Extensive number of incremental dynamic time history analyses on numerical finite element bridge models with deteriorating properties under back to back MS AS sequences were utilized to evaluate the efficacy of different repair jackets on the post repair behavior of RC bridges subjected to AS attacks. Results indicate the dramatic impact of repair jacket application on post MS resilience of damaged bridge piers up to 45.5 % increase of structural collapse capacity subjected to aftershocks of multiple intensities. Besides, the efficacy of repair jackets is found to be proportionate to the intensity of AS attacks. Moreover, the steel jacket exhibited to be the most vulnerable repair intervention compared to CFRP, irrespective of the seismic sequence (severe MS severe or moderate AS) or earthquake type (near fault or far fault).

목차

Abstract
1. Introduction
2. Research Significance
3. Prototype Highway Bridge Structure
4. Confining Repair Jackets for Bridge Pier Rehabilitation
5. Nonlinear Numerical Finite Element Modeling
6. Incremental Dynamic Analysis
7. Fragility Analysis of the Bridge
8. Conclusions
References

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