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폭발 하중에 대한 FRP 재킷 시스템이 보강된 철근콘크리트 기둥 해석 모델 개발
신지욱,Shin, Jiuk 한국공간구조학회 2021 한국공간구조학회지 Vol.21 No.2
This paper aims to develop numerical models for seismically-deficient reinforced concrete columns retrofitted using a fiber-reinforced polymer jacketing system under blast loading scenarios. To accomplish the research goal, a coupling model reproducing blast loads was developed and implemented to the column model. The column model was validated with a past experimental study, and the blast responses were compared to the numerical responses produced by past researchers. The validated modeling method was implemented to the non-retrofitted and retrofitted column models to estimate the effectiveness of the retrofit system. Based on the numerical responses, the retrofit system can significantly reduce the peak dynamic responses under a given blast loading scenario.
FRP 기둥 재킷 시스템이 보강된 지진 취약 철근콘크리트 건축물의 유한요소해석
신지욱,이상열,지동현,Shin, Jiuk,Lee, Sang-Youl,Ji, Dong-Hyun 한국공간구조학회 2021 한국공간구조학회지 Vol.21 No.2
This study develops finite element models for seismically-deficient reinforced concrete building frame retrofitted using fiber-reinforced polymer jacketing system and validates the finite element models with full-scale dynamic test for as-built and retrofitted conditions. The bond-slip effects measured from a past experimental study were modeled using one-dimensional slide line model, and the bond-slip models were implemented to the finite element models. The finite element model can predict story displacement and inter-story drift ratio with slight simulation variation compared to the measured responses from the full-scale dynamic tests.
실물 동적 실험을 통한 기존 RC 모멘트 골조에 대한 FRP 재킷시스템의 보강효과
신지욱 ( Shin Jiuk ),유영찬 ( You Young-chan ),최기선 ( Choi Kisun ),김민선 ( Kim Minsun ),이현지 ( Lee Hyunjee ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.1
This research presents effectiveness of fiber-reinforced polymer column jacketing system for a non-ductile reinforced concrete building frame constructed before the 1970s. To investigate the retrofit effects, a series of full-scale dynamic tests for the retrofitted test frame was conducted, and the dynamic responses were compared to those of the non-retrofitted test frame. The effectiveness of the retrofit system was investigated in terms of response reductions, damage mechanisms and drift concentration factors.