초록 ▼

연구목적
○ 저층 건축물의 내진성능평가 및 내진성능평가 지침 제안
○ 지진피해 저감을 위한 내진보강상세 및 표준안 제안
○ 내진보강 활성화 방안 및 정책 제안

연구내용
○ 국내 기존 저층건축물 현황 파악
- 건축물 현황 파악을 위한 국토해양부 통계자료 분석
- 연도별, 용도별 층수 및 구조형식의 분포 현황 분석
- 통계분석기법을 활용한 누락 통계자료의 추정
○ 기존 저층건축물의 내진성능 실태 분석
- 국내외 설계기준 분석 및 설계 지진하중의 크기 비교
- 국내외 지진

연구목적
○ 저층 건축물의 내진성능평가 및 내진성능평가 지침 제안
○ 지진피해 저감을 위한 내진보강상세 및 표준안 제안
○ 내진보강 활성화 방안 및 정책 제안

연구내용
○ 국내 기존 저층건축물 현황 파악
- 건축물 현황 파악을 위한 국토해양부 통계자료 분석
- 연도별, 용도별 층수 및 구조형식의 분포 현황 분석
- 통계분석기법을 활용한 누락 통계자료의 추정
○ 기존 저층건축물의 내진성능 실태 분석
- 국내외 설계기준 분석 및 설계 지진하중의 크기 비교
- 국내외 지진피해 사례조사 및 구조형식별 손상 분류
- 구조 형식별 내진성능 실태 분석
○ 내진성능 평가방법 검토 및 개선
- 국내외 내진성능 평가방법 비교 분석
- 국내의 제안된 내진성능 평가기법 분석 및 해결방안 제시
- 내진성능 평가기법의 수정 및 개선안 제시
- 내진성능 평가 예제를 통한 평가방법의 검증
- 내진성능 평가 프로그램 개발 및 매뉴얼 작성
○ 저층건축물의 구조형식별 내진보강 방안 도출
- 구조형식별 내진 취약부 분석
- 손상제어를 위한 부위별 내진보강기법 분석
- 기존 내진보강기법의 분석 및 문제점 도출
- 내진보강 재료의 특성 분석 및 기존 건축물과의 정합성 분석
- 구조형식별 내진성능향상을 위한 상세 개발
○ 구조형식별 내진성능 검증실험 및 평가
- 구조 재료의 특성 평가 실험 및 분석
- 내진보강 재료의 특성 평가 실험 및 분석
- 주요 구조부재의 내진성능 평가 실험 및 분석
- 동적실험을 통한 내진보강기법의 효율성 검증
- 지진하중 크기에 따른 손상도 예측
- 내진설계기준 대비 내진보강효과의 타당성 검증
내진보강 지침(안) 및 기술표준(안) 제시
- 내진성능 평가지침(안) 제시
- 조적조 내진보강 표준상세(안) 및 지침(안) 제시
- RC조 내진보강 표준상세(안) 및 지침(안) 제시
○ 내진보강 활성화 방안 제시
- 내진보강 추진에 관련된 현행 제도의 현황 및 개선 필요성 분석
- 내진보강 활성화를 위한 현행 제도의 대안 및 건의안 제시
- 내진보강 관련 현행제도의 발전 지향 목표 설정
- 내진보강 활성화를 위한 저층 건축물의 내진성능 인증(안) 건의
○ 내진보강 지침(안) 및 기술표준(안) 제시
- 내진성능 평가지침(안) 제시
- 조적조 내진보강 지침(안) 및 기술표준(안) 제시
- RC조 내진보강 지침(안) 및 기술표준(안) 제시

기대효과 및 활용방안
○ 국내 실정에 적합한 내진성능평가 절차 확립 및 개발된 기존 건축물 내진보강 지침 제정 고시
○ 기존 비내진설계 건축구조물의 구조안전성 확보를 통한 사회적 안전성의 증대
○ 내진성능향상을 위한 효과적인 내진보강 기술 확보
○ 기존 저층건축물에 대한 효과적인 내진보강 기술 확보
○ 기존 저층건축물에 대한 내진보강사업에 활용
○ 노후 구조물의내진보강 및 리모델링 사업의 활성화
○ 내진 보강 활성화 방안을 위한 법적 제도 마련에 활용
(출처 : 기존 저층 건축물 내진성능 확보 기술 개발 1권 보고서 요약서 5P)

Abstract ▼

Ⅳ. Conclusions
1. Grasp the current situation of domestic existing low-rise buildings
• Domestic current situation of buildings were analyzed based on Ministry of Land statistics by year, by use, by heights and by structural systems
• Classifications of unclear structure types were clarifi

Ⅳ. Conclusions
1. Grasp the current situation of domestic existing low-rise buildings
• Domestic current situation of buildings were analyzed based on Ministry of Land statistics by year, by use, by heights and by structural systems
• Classifications of unclear structure types were clarified in the statistics and, missing statistical data were estimated and complemented using statistical analysis techniques
2. Analysis of current situation of seismic performance of existing low-rise buildings
• Seismic design codes in each countries were compared and analyzed, and data to verify changes of seismic design detail according to design earthquake load were suggested
• The failure modes by structural systems were identified by analyzing earthquake damage in foreign countries and reviewed for compliance with design seismic loads.
• sample drawings of domestic existing low-rise buildings by use were collected and made, and sample survey was performed. Member detail and structural systems were analyzed. Also, seismic performance of collected buildings were evaluated and current situations were analyzed.
3. Review and improvement of evaluation method of seismic performance
• Evaluation methods of seismic performance in each countries were compared and evaluated merits and faults, specific items for domestic unique structural system were devised.
• Proposed domestic evaluation methods of seismic performance were analyzed and improvements of evaluation method of seismic performance were proposed.
• Examples of seismic performance test by using proposed evaluation method of seismic performance were proposed, and verified the suitability of evaluation method of seismic performance by comparing results of seismic evaluation and precise analysis of the structure.
• Program of evaluation method of seismic performance was developed for easy using, and user manual was rnade and proposed
4. Plan derivation of seismic retrofit of low-rise buildings by structural system
• Seismic weak points based on damage patterns by analyzing earthquake damages were derived and derivations of seismic retrofit were investigated.
• Based on the results of analysis about existing seismic retrofit methods and research trends, seismic retrofit methods of damage control for seismic weak point was analyzed, and principles of seismic retrofit methods applicable to domestic unique structural systems were arranged.
• In the case of masonry buildings consisted of purely masonry system, seismic retrofit method using thin metal plate and plastering metal lass was proposed. In addition, to prevent dropping of face bricks installed on the exterior wall, spiral metal press-in method was proposed .
• In the RC frame structure consist of column and beam members, seismic retrofit methods mostly used at domestic and abroad such as using steel reinforcement and fiber reinforced sheets were basically used. But, In the case of RC frame with no seismic retrofit details, destructions of junction of the RC frame prior to destructions of column and beam member were verified throught experiments, and seismic retrofit method using fiber-reinforced composite panels was proposed at this case.
• To prevent shear failure of RC frame with masonry wall used frequently in schools and public buildings, windowed vibration control system using steel slit damper was developed, and input reduction type vibration control system using this system was proposed.
• To seismic retrofit at multi-family housing RC buildings with first floor piloti that frequently occurs earthquake damage, input reduction type vibration control system using damper rod with hysteresis was proposed and details were developed. To seismic retrofit at RC piloti, strength reinforcement method using bearing wall and brace was proposed in Japan. But, because of almost of RC first floor piloti used by parking lot,vibration control system that can be installed at columns that does not disturb access to parking lot was proposed.
5. Performance test for seismic performance by structural system and evaluation
• Prior to the seismic retrofit design of masonry buildings, because of a lack of experimental data about material properties of masonry objects in Korea, tests of material properties of masonry objects were performed, and mortar compressive strength, compressive strength of the objects, the prism compressive strength, shear strength were investigated.
• Seismic retrofit method for masonry walls were proposed by modifying and supplementing of existing proposed strength and ductility seismic retrofit types. In addition, to verify the effectiveness of proposed spiral metal press-in method for prevention of dropping of face bricks installed on the exterior wall, specimens applied this method were made, and the before and after performances of seismic retrofit were verified by static load test.
• Static load tests of RC frame specimens with no seismic retrofit were performed, and structural characteristics and failure modes were evaluated. Through experiments, In the case of RC frame with no seismic retrofit details, destructions of junction of the RC frame prior to destructions of column and beam member were verified, to prevent this, the fiber-reinforced composite panels were installed in a panel of the junction, and static verification tests were performed. As a result, ductility ability of RC frame was increased approximately two times or more.
• Specimens with windowed vibration control system that can prevent shear failure of RC frame with masonry wall and increase ductility of structure were tested by static and dynamic experiments, and were verified its performance. seismic retrofit method using windowed vibration control system proposed in this research, were greatly increased in strength, stiffness, energy absorption capability beore seismic retrofit, and were verified one of very efficient seismic retrofit methods.
• To evaluate the performance of seismic retrofit about proposed structure of RC piloti with vibration control system, three-dimensional specimens have first floor piloti and second floor with shear wall were made and were tested by dynamic experiments. As a result, in the case of applied seismic retrofit method proposed in this research, the energy absorption capacity was increased more than four times and damage was greatly reduced before seismic retrofit. In addition, while piloti structure before seismic retrofit located ground sc was damaged heavily against the maximum size of the earthquake proposed domestic seismic design codes, piloti structure after seismic retrofit was damaged slightly, and was damaged moderately against the double size of the earthquake proposed domestic seismic design codes.
6. Economic analysis based on seismic retrofit
• Typical design details for each structural systems were analyzed, and through proposed seismic performance evaluation method in this research or non-linear analysis， seismic performance were evaluated, and seismic retrofit designs that can be secure safety about domestic seismic loads were performes. In the seismic retrofit designs, both of existing seismic retrofit designs and seismic retrofit methods proposed in this research were applied to estimate seismic retrofit quantity and cost of construction, and compared the economics. As a result, compared with existing seismic retrofit methods, modified proposed seismic retrofit methods showed about 20% or more cost-effectiveness.
• expressions of the prediction of earthquake damages of before and after low-rise buildings seismic retrofited were modified and proposed, and losses due to earthquake damage were estimated. In reviewing its effectiveness using losses due to earthquake damage and seismic retrofit costs, the percentage of reduction in amount of earthquake damage compared with seismic retrofit costs showed approximately two to three times and showed a very good efficiency.
7. Suggestion of seismic retrofit guidelines and technical standards
• The seismic evaluation guidelines and examples of existing low-rise buildings were proposed. To effectively apply to modestic unique structural systems, the proposed seismic evaluation guidelines were modifird and complemented. In addition, in order to easy use of seismic performance evaluation, the seismic evaluation guidelines were programmed and user manual was suggested.
• Considering the characteristics of domestic masonry buildings consisted of purely masonry system, standard detail and guidelines for strength reinforced type were proposed. In this guidelines, design and standard details of not only detailed strength reinforced type but also prevention of dropping of face bricks installed on the exterior wall were proposed and can be more secured seismic stability.
• Most target seismic retrofit of RC buildings have no seismic retrofit in Koea. In this case, earthquake damage patterns are defferent from high seismicity regions. In this research, considering that these kinds of details, RC seismic retrofit standard seismic details and guidelines about seismic retrofit on junction of the RC frame and shear and ductility seismic retrofit of the RC frame with masonry wall and RC piloti structure consist of the second floor or above shear wall were proposed.
8. Proposal for promotional strategies of seismic retrofit
• According to the result of analysis of the current system situation and need for improvement related to promoting seismic retrofit, regulations about establish and promotion of seismic retrofit measures require sub-regulation of specific methods and procedures were identified.
• As an alternative of the current system for seismic retrofit, improvements and propositions of earthquake disaster prevention law weres proposed.
• If an earthquake occurs, to minimize people's lives property and with the object of spreading private activities of reserving of seismic performance, certification of seismic performance of low-rise buildings were proposed.
(출처 : 기존 저층 건축물 내진성능 확보 기술 개발 1권 SUMMARY 19P)

목차 Contents

• 표지 ... 1
• 목차 ... 3
• 그림목차 ... 10
• 표목차 ... 19
• 제6장 내진보강 상세별 내진성능 검증실험 ... 24
• 6.1 조적조 건죽물 ... 24
• 6.1.1 조적조 건축물 배진보강 연구 현황 및 적용사례 분석 ... 25
• 6.1.2 내진보강 방안 제시 ... 51
• 6.1.3 내진보강 상세별 내진성능검증 실험 ... 66
• 6.2 RC조 건축물 ... 113
• 6.2.1 RC조 건축물 내진보강 연구현황 및 적용사례 분석 ... 113
• 6.2.2 내진보강 방안 제시 및 보강 원리 ... 125
• 6.2.3 RC조 내진성능 검증 실험 ... 133
• 6.3 소결 ... 248
• 6.4 참고문헌 ... 250
• 제7장 내진성능 평가절차 지침 ... 272
• 7.1 내진성능 평가절차 제안 ... 272
• 7.1.1 일반사항 ... 272
• 7.1.2 예비 평가 ... 278
• 7.1.3 2단계 상세평가 ... 286
• 7.1.4 3단계 정밀평가 ... 308
• 7.2 내진성능 평가절차 검증 ... 316
• 7.2.1 대상구조물 선정 ... 316
• 7.2.2 성능평가 요약 ... 322
• 7.2.3 평가 종합 ... 332
• 7.3 소결 ... 332
• 7.4 참고문헌 ... 333
• 제8장 구조형식별 내진보강 상세 및 보강기법 ... 334
• 8.1 조적조 ... 334
• 8.1.1 조립식 강판밴드 보강공법 ... 336
• 8.1.2 경사 핀스 보강공법 ... 337
• 8.2 RC조 ... 341
• 8.2.1 개요본 ... 341
• 8.2.2 보강 순서도 ... 341
• 8.2.2 순수 프레임 구조 ... 344
• 8.2.2 허리벽 프레임 구조 ... 350
• 8.2.3 필로티 구조 ... 360
• 8.3 절골조 ... 377
• 8.3.1 개요 ... 377
• 8.3.2 절골조 내진보강의 특징 ... 377
• 8.3.3 소성변형 능력을 향상시키기 위한 보강방법 ... 379
• 8.3.4 내력의 향상을 위한 보강방법 ... 382
• 8.3.5 모멘트 저항시스템에 대한 보강방법 ... 384
• 8.3.6 가새골조 시스템에 의한 보강방법 ... 386
• 8.3.7 보강재 추가 [Adding Suoolemental Members] ... 389
• 8.4 목조 ... 391
• 8.4.1 개 요 ... 391
• 8.4.2 수직재 하부보강공법 ... 391
• 8.4.3 외부지지 보강공법 ... 396
• 8.4.4 벽 외부 보강공법 ... 402
• 8.4.5 접합부 보강공법, 부재교환 ... 404
• 8.4.6 목조 면진 및 제진공법 ... 408
• 8.5 참고문헌 ... 412
• 제9장 저층 건축물의 내진보강 활성화 방안 ... 414
• 9.1 개요 ... 414
• 9.1.1 연구의 배경과 목적 ... 414
• 9.1.2 연구의 내용과 방법 ... 416
• 9.1.3 연구의 구성과 흐름 ... 418
• 9.2 현행제도 현황과 개선의 몰요성 ... 420
• 9.2.1 현행제도 개판 ... 420
• 9.2.2 현행제도 개선의 필요성 ... 431
• 9.3 내진보강 활성화 단기 방안 ... 438
• 9.3.1 현행제도의 대안 ... 438
• 9.4 내진보강 활성화 중·장기 방안 ... 462
• 9.4.1 현행제도의 발전방향 ... 462
• 9.4.2 저층 건축물의 내진성능 인증제도[안] ... 486
• 9.5 소결 ... 497
• 9.6 참고문헌 ... 502
• 제10장 결론 ... 504
• 끝페이지 ... 511