고성능 리모델링기술을 활용한철근콘크리트 골조의 내진성능 평가 및 개선

하기주,이동렬,김창석 대한건축학회지회연합회 2024 대한건축학회연합논문집 Vol.26 No.2

지진하중을 받는 철근콘크리트 골조의 내진선능을 평가하고 개선하기 위하여 실물크기 1/3정도로 표준실험체 및 고성능 리모델링기술을 적용한 실험체를 제작하였다. 그리고 지진하중을 받는 철근콘크리트 골조의 내진성능 개선을 위하여 골조면내 ALC판넬 보강시스템, 골조면내 X형 강재브레이스 보강시스템, 골조면내 강재프레임 보강후 X형 강재브레이스 보강시스템 적용하여 철근콘크리트 골조를 보강한 후, 각 실험체의 이력거동, 최대내력, 파괴형태, 에너시 소산능력 등을 평가하였으며 주요결과는 다음과 같다. ￭ 철근콘크리트 골조면내 ALC판넬 보강시스템, 골조면내 X형 강재브레이스 보강시스템, 골조면내 강재프레임 보강후 X형 강재브레이스 보강시스템을 활용하여 보강한 실험체 RFAR, RFXB, RFXB-F는 표준 철근콘크리트 골조 실험체 SRF에 비하여 최대내력이 1.46배 ~ 4.27배 증가하였다. ￭ 철근콘크리트 골조를 고성능 리모델링기술을 활용하여 보강한 실험체 RFAR, RFXB, RFXB-F는 이력거동특성을 고찰한 결과, 성능개선은 물론 안정적인 이력거동을 나타내었으며, 에너지 소산능력은 변위연성 3에서 2.14배 ~ 4.72배 증가하였다. Four reinforced concrete frame using advanced remodelling technology, which is designed by the conventional method, remodelling technology of ALC panel, X-type steel bracing system with and without steel frame in R/C frame, were tested under both vertical and cyclic loadings, Experimental programs were carried out to evaluate and improve the seismic performance of such test specimens, such as the hysteretic behavior, the maximum horizontal strength, energy dissipation capacity, and crack propagation etc. under load reversals. All the specimens were modeled in one-third scale size. Based on the test results reported in this study, the following conclusions can be made. The maximum load-carrying capacity of specimens(RFAR, RFXB, RFXB-F) designed by the advanced remodelling technology for standard specimen(SRF) were increased 1.46~4.27 times in comparison with the standard specimen(SRF). Energy dissipation capacity of specimens designed by the improving of seismic performance were increased 2.14~4.72 times in comparison with the standard specimen(SRF).

기존 철근콘크리트 건물의 리모델링을 위한 골조 면내 보강기술의 내진성능 평가 및 개선 ( Improvement and Evaluation of Earthquake-Resistant Performance of Frame Retrofitting Techiques for Remodeling in Existing Reinforced Concrete Building )

하기주,신종학,최민권,이영범,이상근 대한건축학회 2002 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.22 No.1

지진에 대비한 기존 건축물의 내진보강 활성화를 위한 지원제도 방안

하기주,이동렬 대한건축학회지회연합회 2022 Vol.24 No.6

In order to protect the lives and property of the people in the event of an earthquake and minimize social and economic damage, we have continuously established legal grounds for seismic design of buildings on a national level. In particular, under the Earthquake and Volcanic Disaster Countermeasures Law, existing buildings will be completed before the seismic design standards are established or strengthened. Therefore, it is judged that it is difficult to achieve the seismic performance level required by the current seismic design standards. Budget support for domestic public buildings is continuously expanding in order to further increase the seismic retrofitting rate by 17% by 2025 (the overall seismic retrofitting rate is equivalent to 62.6%), but compared to private buildings. Is an inadequate reality. Therefore, in order to establish a policy and institutional foundation for activating seismic retrofitting of existing buildings, we raised awareness of the need for seismic retrofitting of buildings to which seismic retrofitting has not been applied, and built buildings by implementing seismic retrofitting. Ensuring safety is required. Therefore, in this study, in order to activate seismic retrofitting of existing buildings in Japan in preparation for an earthquake, we will look at the current state of the seismic retrofitting support system for domestic buildings, and plan a support system for activating seismic retrofitting of existing buildings. 지진에 대비하여 국민의 생명과 재산을 보호하고 사회· 경제적 피해를 최소화하기 위하여 국가적 차원에서 건축물의 내진설계를 위한 법적인 근거를 지속적으로 마련하고 있다. 특히 지진·화산재해대책법에서는 기존 건축물의 내진설계기준이 제정되거나 강화되기 이전에 준공되어 현행 내진설계기준에서 요구하는 내진성능수준을 달성하기 어려울 것으로 판단된다. 국내의 공공건축물은 2025년까지 추가로 내진보강율을 17% 더 높이기 위하여(전체 내진성능 확보율은 62.6%에 해당) 예산지원이 지속적으로 확대되고 있으나, 민간 건축물에 대한 대비는 미흡한 실정이다. 그러므로 기존 건축물의 내진보강 활성화를 위한 정책 및 제도적 기반을 마련하기 위하여 내진설계가 미적용된 건축물의 내진보강 필요성에 대한 인식을 제고하1여야 한다. 또한 기존 민간건축물의 내진보강 실시를 통한 건축물의 안전성 확보가 요구된다. 따라서 본 연구에서는 지진에 대비한 국내 기존 건축물의 내진보강 활성화를 위하여 국내 건축물 내진보강 지원제도 현황을 살펴보고, 기존 건축물의 내진보강 활성화를 위한 지원제도 방안을 제시하였다.

매입형 탄소섬유봉과 탄소섬유쉬트를 보강한 철근콘크리트 보-기둥 접합부의 내진성능 평가

하기주,강현욱 대한건축학회지회연합회 2013 대한건축학회지회연합회 학술발표대회논문집 Vol.2013 No.1

표면요철 매입형 FRP봉과 CFRP시트를 복합 보강한 철근콘크리트 보의 구조성능 평가

하기주,하영주 한국구조물진단유지관리공학회 2014 한국구조물진단유지관리공학회 논문집 Vol.18 No.4

본 연구에서는 기존 철근콘크리트 건축물의 구조성능 개선을 위하여 표면요철 매입형 FRP봉과 CFRP시트를 사용한 철근콘크리트 보의 구조성능을 평가하기 위하여 실험을 수행하였다. 표면요철 매입형 FRP봉의 사용량, CFRP시트 보강 유무에 따라 총 7개의 실험체를 제작하고 실험을 수행하여 구조성능을 평가하였으며, 본 연구의 실험결과를 근거로 다음과 같은 결론을 얻었다. 표면요철 매입형 FRP봉 보강 실험체 NER 시리즈의 경우, 표준실험체 NBS와 비교하여 12~46% 내력이 증가하였고, 표면요철 매입형 FRP봉과 CFRP시트를 복합 보강한 실험체 NERL 시리즈는 표준실험체 NBS보다 최대내력이 22~77% 증가하였다. 그리고 표면요철 매입형 FRP봉으로 보강된 실험체 NER 시리즈는 부착슬립, 피복분리 형태로 파괴되었으나, 표면요철 매입형 FRP봉과 CFRP시트을 복합 보강한 실험체 NERL 시리즈는 CFRP시트의 연속보강에 따른 콘크리트 구속효과 및 모재와 표면요철 매입형 FRP봉의 부착강도 증가로 인하여 부착슬립의 형태로 파괴되었다. In this study, experimental research was carried out to evaluate the structural performance of the reinforced concrete beam using hybrid retrofitting with two materials (groove and embedding FRP rod, CFRP sheet) in existing reinforced concrete buildings. Seven reinforced concrete beams, retrofitted groove and embedding FRP rod (NER series) and groove and embedding FRP rod with CFRP sheet (NERL series), and standard specimen (NBS) were constructed and tested under monotonic loading. Design parameters of test specimens are the amount of groove and embedding FRP rod and lapping CFRP sheet. Test results showed that the maximum load carrying capacity of specimens with groove and embedding FRP rod and groove and embedding FRP rod with CFRP sheet (NERL series) were increased the by 12~46% and 22~77% respectively in comparison with the standard specimen NBS. Test specimens NER series were failed with the adhesion slip and concrete cover separation. And test specimens NERL series were failed with the adhesion slip due to the confining effect of lapping CFRP sheet.

해체산업 활성화를 위한 현행법규 및 제도 개선 연구

하기주,신종학,이동렬,하재훈 대한건축학회지회연합회 2008 대한건축학회연합논문집 Vol.10 No.1

Generally speaking, the demolition is the subsequent construction activity which has been done after building life-span of twenty two years or so. However, we have not prepared suitable systems and laws and regulations as long-term solutions. To solve these problems, we have focused on two research methods as below: 1) We have surveyed and analyzed current laws and regulations on the demolition in Korea. 2) We have scrutinized Japanese advanced laws and regulations on the demolition for finding out effective applications to demolition industry in Korea. Based on the major findings of this study, we are able to make a few concluding remarks and suggestions as below: 1) Laws and regulations, such as licence system, deliverly system, and construction waste policy etc, on the demolition in Korea should be upgraded to reflect advanced technologies and methods of construction and to improve the demolition industry. 2) Deregulation is strongly needed for suitable applications of developed technologies.

기존 철근콘크리트 프레임의 내진성능 개선을 위한 재생 시스템의 개발

하기주,김광연 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

In this study, experimental research was carried out to evalulate the hysteretic behavior of reinforced concrete frame designed by high performance techniques, using carbon fiber plate, K-type bracing system with or without steel frame. Experimental programs were accomplished to evaluate the structural performance of such test specimens, such as the hysteretic behavior, the maximum horizontal strength, crack propagation, and ductility etc. Specimens(RFCP, RFKB, RFKB-F), designed by the improvement of earthquake-resistant performance, were attained more load-carrying capacity and stable hysteretic behavior.

고인성섬유 복합모르타르 전단벽체의 구조성능 평가

하기주,신종학,김운용 대한건축학회지회연합회 2005 대한건축학회연합논문집 Vol.7 No.1

고강도 철근콘크리트 부재 단면의 내진성능 평가

河基柱 慶一大學校 1994 論文集 Vol.10 No.1

The objective of this research is to evaluate the seismic behavior of reinforced high-stength concrete section subjected to reversed repeated loadings. An analytic method is presented for the derivation of the moment-curvature relations for its sections subjected to reversed repeated loadings in the inelastic range. The method utilizes stress-strain models for high-strenght concrete and reinforcing steel subjected to cyclic loadings. Computer programs were developed to compute the bending moment and the curvature for cyclicallly loadede reinforced high-strenghth concrete settions with or without constant axial comprission. The analytic method is used to study the effects of factors, such as the strengyg of concrete, the tension and compression reinforcement, the axial load, yield strength of steel, the confinement of stirrup affecting the behavior of reinforced high-strength concrete section under load reversals.

고강도 철근콘크리트 보-기둥 접합부의 내진성능 평가 및 개선

河基柱 慶一大學校 1993 論文集 Vol.9 No.1

For high-rise reinforced concrete building, it is generally recognized that beam-column joints, under severe seismic loads, may become more critical structural componenets than other structure elements. In this dissertation, experiment research was carried out to study the hysteretic behavior of reinforced high-strength concrete beam-column joints, and to develop new approaches for design of such joint in high-rise reinforced concrete buildings. New approaches for moving the plastic hinging zone away from the column face are expected to be more effective in improving the seismic resistance performance of reinforced high-strength concrete frame structures.