• Title/Summary/Keyword: 이력특성

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Dynamic Response of Plate Structure Subject to the Characteristics of Explosion Load Profiles - Part B: Analysis for the Effect of Explosion Loading Time According to the Natural Period for Target Structures - (폭발하중 이력 특성에 따른 판 구조물의 동적응답 평가 - Part B: 고유주기에 따른 폭발하중 지속시간의 영향 분석 -)

  • Kang, Ki-Yeob;Choi, Kwang-Ho;Ryu, YongHee;Choi, JaeWoong;Lee, Jae-Myung
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.28 no.2
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    • pp.197-205
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    • 2015

  • Offshore structures for the gas production are exposed to the risk of gas leaks, and gas explosions can result in fatal damages to the primary structures as well as secondary structures. To minimize the damage from the critical accidents, the study of the dynamic response of structural members subjected to blast loads must be conducted. Furthermore, structural dynamic analysis has to be performed considering relationships between the natural frequency of structural members and time duration of the explosion loading because the explosion pressure tends to increase and dissipate within an extremely short time. In this paper, the numerical model based on time history data were proposed considering the negative phase pressure in which considerable negative phase pressures were observed in CFD analyses of gas explosions. The undamped single degree of freedom(SDOF) model was used to characterize the dynamic response under the blast loading. A blast wall of FPSO topside was considered as an essential structure in which the wall prevents explosion pressures from the process area to utility and working areas. From linear/nonlinear transient analyses using LS-DYNA, it was observed that dynamic responses of structures were influenced by significantly the negative time duration.

  • https://doi.org/10.7734/COSEIK.2015.28.2.197 인용 PDF KSCI

Structural Parameters and Modeling Technique for Prediction of Dynamic Response of a One-story Building with a Flexible Diaphragm (유연한 지붕을 갖는 단층 건물의 동적응답 예측을 위한 해석모델링 방법과 구조변수의 설정)

  • ;Donald W. White
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.16 no.3
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    • pp.271-280
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    • 2003

  • The purpose of the study presented in this paper is to develope the general model for capture of the linear and nonlinear response of a flexible diaphragm building in which there are significant contributions from the out-of-plane walls. Two single-story single-diaphragm half scale reinforced masonry buildings were tested by researchers at the United States Army Construction Engineering Research Laboratory (CERL). The first had a metal deck diaphragm. The second specimen had a diaphragm with a single layer of diagonal lumber sheathing, A multiple degree of freedom (MDOF) approach is adopted in this paper. The required stiffnesses and strengths of the components within this model are determined.

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