2017.11.15. 포항 흥해지진의 저층 RC 비틀림 비정형 건축물의 피해 및 손상 특성

다국어 초록 (Multilingual Abstract)

This study examines the seismic failure of RC low-rise building structures having irregularities at the ground story during the 15 November 2017 Pohang, Korea, earthquake, Mw = 5.4, which is the second strongest since the government began monitoring them in 1978 in South Korea. Some 2,000 private houses were damaged or destroyed in this earthquake. Particularly, serious damage to the piloti story of RC low-rise residential building structures of fewer than five stories was observed within 3 km of the epicenter with brittle shear failure of columns and walls due to severe torsional behavior. Buildings below six stories constructed before 2005 did not have to comply with seismic design requirements, so confinement detailing of columns and walls also led to inadequate performance. However, some buildings constructed after 2005 were damaged at the flexible side of the piloti story due to the high torsional irregularity. Based on these results, this study focuses on the problems of the seismic torsion design approach in current building codes.

목차 (Table of Contents)

• A B S T R A C T
• 1. 서 론
• 2. 저층 RC 비틀림 비정형 건축물의 손상 분석
• 2.1 4층 RC 필로티 건축물 (C Building)
• 2.2 5층 RC 필로티 건축물 (F Building)
• 2.3 3층 RC 모멘트 저항 골조 건축물 (H School)
• 2.4 4층 RC 벽식 건축물 (K Building)
• 3. 저층 RC 비틀림 비정형 건축물의 거동 특성
• 3.1 비틀림 비정형 건축물의 거동 특성과 비틀림 설계법의 문제점
• 3.2 RC 기둥의 전단 파괴 특성
• 3.3 RC 얇은 벽체의 파괴 특성
• 4. 결 론
• REFERENCES

참고문헌 (Reference)

1 Lee HS, "Torsion Design Implications from Shake-table Responses of an RC Low-rise Building Model Having Irregularities at the Ground Story" 44 : 907-927, 2015

2 Jeong SH, "Summary of 2017 Pohang Earthquake (2017.11.15., ML=5.4). 2017 Special Forum of EESK: Pohang earthquake and building damage: 2017 Nov 27; Seoul, Korea"

3 이한선, "Shake-table responses of a low-rise RC building model having irregularities at first story" 국제구조공학회 40 (40): 517-539, 2011

4 Lee HS, "Shake-table Responses of an RC Low-rise Building Model Strengthened with Buckling Restrained Braces at Ground Story" 5 (5): 703-731, 2013

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6 Ministry of the Interior and Safety, "Report of earthquake occurrence and coping situation in Pohang"

7 Chung LL, "Policy on Seismic Evaluation and Retrofit of School Buildings and Low-rise Buildings (non-seismic design) in Taiwan. Forum in Improving policies and regulations through lessons learned from the 2017 Pohang Earthquake" Structural Performance Enhancement research Center

8 Cho JH, "OhmyNews: 2017 Nov 18"

9 AIK, "Korean Building Code. KBC 2016"

10 AIK, "Korean Building Code. KBC 2009"

11 AIK, "Korean Building Code. KBC 2005"

12 Federal Emergency Management Agency (FEMA), "FEMA 454: Designing for earthquakes - a manual for architects. 2006"

13 Wallace JW, "Damage and Implications for Seismic Design of RC Structural Wall Buildings" 28 (28): S281-S299, 2012

14 SBS, "Columns in the Piloti Story Broken in Three Seconds (News): 2017 Nov 17"

15 Kim SJ, "Building Damage Investigation after the November 2017 Pohang, Korea, Earthquake. Concrete and Seismic Engineering Laboratory (CSEL)"

16 ACI, "Building Code Requirements for Structural Concrete, ACI 318M-14"

17 Shegay AV, "A Database for Investigating NZS3101 Structural Wall Provisions" 2015