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Flat 슬래브 구조물에 대한 온도프리스트레싱 공법적용
정중연 ( Joung Jung-yeun ),정치영 ( Jung Chi-young ),안진희 ( Ahn Jin-hee ),김상효 ( Kim Sang-hyo ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
In this study, it was studied applying thermal prestressing method (TPSM) to the flat slab structure which is recently popular in building structure. In case of the TPSM, both sectional increase effect and prestress effect can be achieved by applying the thermal prestressing method. Therefore before applying the TPSM to practical slab case, experimental research was conducted to evaluate workability and effect of eccentricity of prestressing coverplate. Main variation of the experiments was eccentricity of coverplate. As a result of this study, it was concluded that the TPSM can be applied to the flat slab structures and also that applicability can be achieved by TPSM.
단부 수평가동-수직구속 부재를 적용한 라멘형 가설교량의 거동평가
김상효,정중연,허원호,정치영,Kim, Sang Hyo,Joung, Jung Yeun,Heo, Won Ho,Jung, Chi Young 한국강구조학회 2013 韓國鋼構造學會 論文集 Vol.25 No.1
기존 라멘형 가설교량은 주거더의 온도신축에 따라 벤트부에 과도한 수평력이 유발되는 것을 방지하기 위하여, 연장을 짧게 분할하여 가설되고 있다. 이 때 분할되는 구간에서 중복 설치되는 벤트부가 생기게 되어, 교량의 통수단면 감소와 형하공간 감소에 따른 문제와 중복 설치된 벤트부에 의한 경제성 감소 문제가 발생한다. 따라서 본 연구에서는 라멘형 가설교량 벤트부의 수평력 문제를 해결하고, 중복 설치되는 벤트부를 절감시키기 위한 단부 수평가동-수직구속 부재를 이용한 라멘화 공법을 제안하고, 이에 대한 거동특성분석을 수행하였다. Most rahmen-type temporary bridges are constructed with limited bridge length to prevent excessive horizontal forces due to the thermal expansion of main girder. To achieve a long length temporary bridge several independent bridges are required and they can not share the bents, at the rahmen-type ends, with the adjacent ones. The additional bents require more cost and reduce the section space under bridges. In order to remove extra bents with keeping the rahmen effect at the bridge ends, this study proposes a new rahmen-type movable joint system for temporary bridges.
Y-type Perfobond Rib를 적용한 일체형 및 분절형 복합 PSC 거더의 거동에 관한 실험적 연구
윤지현 ( Yoon Ji-hyun ),정중연 ( Joung Jung-yeun ),안진희 ( Ahn Jin-hee ),김상효 ( Kim Sang-hyo ),이철재 ( Lee Cheol-jae ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.2
This study shows experimental loading tests on monolithic and spliced hybrid PSC girders with Y-type perfobond rib shear connectors. The main purposes of the study are to investigate the static behaviors of joint parts in the spliced girder and load-resisting capacity of Y-type perfobond rib shear connectors in steel-concrete composite connections. Two specimens (monolithic and spliced girder hybrid PSC girder specimens) with 10.3m length were manufactured and tested. As results of the loading tests, static behaviors and crack propagation patterns of spliced girder are determined by cold joint located in joint parts. Because the load-displacement curve of the spliced girder shows similar behavior to the monolithic girder under the initial cracking load state, it is expected that the spliced girder can be utilized effectively in practical design. In addition, Y-type perfobond rib shear connectors can be applied effectively in steel-concrete composite connections.