• Earthquakes and Structures
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• 제10권1호
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• pp.73-89
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• 2016

The seismic performance of moment frames could vary according to the rotation capacity of their connections. The minimum rotation capacity of moment connections for steel intermediate moment frames (IMF) was defined as 0.02 radian in AISC 341-10. This study evaluated the seismic performance of IMF frames with connections having a rotation capacity of 0.02 radian. For this purpose, thirty IMFs were designed according to current seismic design provisions considering different design parameters such as the number of stories, span length, and seismic design categories. The procedure specified in FEMA P695 was used for conducting seismic performance evaluation. It was observed that the rotation capacity of 0.02 radian could not guarantee the satisfactory seismic performance of IMFs. This study also conducted seismic performance evaluation for IMFs with connections having the rotation capacity of 3% and ductile connections for proposing the minimum rotation capacity of IMF connections.

• 한국지진공학회논문집
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• 제20권7_spc호
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• pp.561-567
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• 2016

After the Gyeong-ju 9.12 earthquake, we found the necessity of seismic design of nonstructural element is important to reduce damages in view of properties and economic losses. This study focused on the investigation of damages including both properties and human beings. It was found that most of the damages are leaking of water pipe line, rupture of glasses, spalling of roof finishing, cracks of building, and falling from roof. It was also found that the seismic design force of nonstructural elements is taking account into the natural periods, amplification factors, response modification factors to forsee inelastic behaviors. From this studies, it is recommended that more studies are necessary on the seismic design force of nonstructural element.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall
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• pp.289-296
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• 1999

In order to develop and enhance our methodology of seismic design in the next generation thee is a need to analyze the environment chronicles and concept of the seismic design in foreign countries. For this purpose we have researched the cases of U.S.A and Europe. In this paper the emphasis was put on the european seismicity and seismic design practices for building structures. In this study the comparison of seismic design codes in some european countries regarding fundamental period and design base shears leads to the conclusion that there exists remarkable difference in the approaches. Particularly the base shears used in european countries give larger values than the one proposed by UBC 97. Though each european country has established similar seismic design code there are also still large difference in the level of construction technology and societal implementation of seismic codes.

• 한국지진공학회논문집
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• 제11권3호
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• pp.11-21
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• 2007

지진하중에 의한 구조물의 손상 및 피해는 지진에 의한 동적 하중을 고려한 구조물의 내진설계의 도입을 통하여 저감시킬 수 있으며, 이 때 내진설계 도입으로 인한 구조물의 내진성능 향상 및 그에 필요한 비용을 동시에 고려하여 내진설계 도입의 적합성을 검증해야한다. 본 연구에서는 내진성능의 확률적 평가를 위해서 지진하중과 구조물 자체에 내재되어 있는 불확실성을 고려하여 빌딩구조물의 지진취약도를 작성하였으며 시뮬레이션의 효율성을 높이기 위한 Latin Hypercube 샘플링 기법을 도입하여 해석을 수행하였다. 내진 설계 도입의 필요성 검증을 위해서는 구조물의 물리적 내진성능 이외에도 구조물의 사회적, 경제적 기능 및 가치에 대한 고려가 필요하며 이러한 요소를 고려한 의사결정해석 절차를 등가비용모델의 예를 들어 제시하였다.

• 한국지진공학회논문집
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• 제7권5호
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• pp.1-9
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• 2003

국내 콘크리트댐의 경우 내진설계는 관성력을 고려한 진도법을 적용하여 설계를 하고 있으나, 보수적인 설계 방법으로 동적특성을 반영하지 못하는 단점이 있어, 동적특성을 고려한 댐 내진설계가 필요하다. 또한 콘크리트댐 내진성능평가는 동적해석으로 평가해야 하지만, 국내의 경우 대부분 진도법으로 평가를 하고 있어 현행 기준을 적용하기에는 어려운 점이 있다. 이에 본 연구에서는 진도법, 수정진도법, 동적해석 방법을 수행하여 내진설계 및 내진성능평가 결과에 대해서 비교 분석하였다.

• Earthquakes and Structures
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• 제10권2호
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• pp.463-482
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• 2016

Air Traffic Control (ATC) towers play significant role in the functionality of each airport. In spite of having complex dynamic behavior and major role in mitigating post-earthquake problems, less attention has been paid to the seismic performance of these structures. Herein, seismic response of an existing ATC tower with a wall-frame structural system that has been designed and detailed according to a local building code was evaluated through the framework of performance-based seismic design. Results of this study indicated that the linear static and dynamic analyses used for the design of this tower were incapable of providing a safety margin for the required seismic performance levels especially when the tower was subjected to strong ground motions. It was concluded that, for seismic design of ATC towers practice engineers should refer to a more sophisticated seismic design approach (e.g., performance-based seismic design) which accounts for inelastic behavior of structural components in order to comply with the higher seismic performance objectives of ATC towers.

• 한국구조물진단유지관리공학회 논문집
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• 제6권2호
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• pp.121-126
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• 2002

Due to few earthquakes in our country, one generally has thought to be safe from earthquakes. However, severe earthquakes occurred in Dangsan and Hyogohyeon which one had regarded as the zone that had not been risky for earthquakes, so that so many people died and a lot of buildings and bridges were destroyed. This event surprised our country and we undertook preparation for earthquakes on the full scale. The concept of seismic design was induced in the country which was poor in it for the scarcity of recognition and insufficiency of funds. Recently, many specialists are enforcing the provisions of seismic design. Therefore, this study introduces the method which combines PC-LEADeR( design program for L.R.B.) with LUSAS(linear elastic analysis) and performs the seismic isolation design more elaborately and simply. It verifies the propriety of that method, and it also examine the factors that affect the response of the bridges. Seismic isolation design for bridge using L.R.B. provides both economical efficiency and superior seismic performance. Second, the results between by the method proposed and by time history analysis have 20% error at the maximum. That is, the method proposed very appropriate.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1995년도 봄 학술발표회 논문집
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• pp.88-96
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• 1995

Seismic design provisions in Korea has developed based on seismic provisions in United States (e.g., ATC 3-06). Current seismic design provisions in U .S. is moving toward adopting enhanced concept for design. Federal Emergence Management Agency (FEMA) Provides the NEHRP recommended Provisions for the Development of Seismic Regulations for New Buildings which can be used as a source document for use by any interested members of the building community. Current seismic design provisions in U .S. generally use a uni-level force. These provisions can not be satisfied if the limit state design is concerned. Limit state can be defined as a state causing undesirable performance o( a structure (e .g., serviceability, ultimate, buckling, etc.). Even if there are provision for controlling drift by two levels, it is still difficult to satisfy limit states using uni-level force. Architectural Institute of Japan (AIJ) uses a hi-level forces Int seismic loadings which can satisfy serviceability and ultimate limit state. However, the seismic parameters used in AIJ guideline are basically determined by subjective manner of code committee member and professions. These parameters need to be determined based on target quantities (target reliability, target energy dissipation, target displacement, target stress level, etc.). This study develops the method to determine the sesmic design parameters based on a certain taget level. Reliability is used as a target level and load factors in ANSI/ASCE 7-88 are selected as design parameters to be determined.

• 조명전기설비학회논문지
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• 제23권8호
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• pp.74-79
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• 2009

전력공급에 중요한 설비가 집중되어 있는 건축물 내의 수변전설비가 내진시설이 고려되지 않은 경우 지진 발생시 전력 시설물 낙하, 이동 등으로 인한 설비 피해 및 전기화재 등 제2의 피해가 발생을 할 수 있다. 하지만 수변전실 내진설계의 필요성에도 불구하고 국내에서는 아직 적용하고 있지 않다. 따라서 건축물 내에 수변전실의 전기설비 내진설계에 관하여 국내 건축구조설계 기준과 일본의 건축전기설비 내진 설계 시공 매뉴얼을 참조하여 건축물 내에 시설되는 수변전설비의 내진 설계 방법 및 내진 설계 예를 제시하였다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1998년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Spring 1998
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• pp.75-84
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• 1998

Korea is located in either low or moderate seismicity continental region. It is realized that design codes and underlying design concepts of high seismicity region may not be appropriate to low or moderate seismicity region. In this paper, test results on the seismic response of structures without seismic detailing are reexamined and compared with numerical analysis results. The seismic design concept based on limited ductility is proposed as an alternative seismic design approach in moderate seismicity regions.