• Fire Science and Engineering
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• v.32 no.2
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• pp.38-47
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• 2018

In this study, we compare the engineering seismic design method considering the physical properties of piping materials and the specification-oriented design method according to the seismic design standards of fire fighting equipment. In the case of the seismic design method considering the physical properties of piping materials, the safety of the piping will be analyzed through the combined value of the torsional stress and the bending stress generated in the piping. However, in the case of the design-centered design method, instead of the safety of the piping material, it calculates the moving force of the pipe and interprets whether or not the shaking prevention strut can bear. Fire extinguishing equipment piping is possible through safety analysis of stress and displacement of piping material because piping safety can not be secured via unstable force generated in a certain section with one connected structure is there. Therefore, it is necessary to apply analytical method considering seismic performance of building structure and material properties of piping for seismic design of safe fire extinguishing system piping.

• 건축구조
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• v.19 no.2
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• pp.13-14
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• 2012

• Journal of the Korean Institute of Educational Facilities
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• v.21 no.4
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• pp.22-29
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• 2014

• Journal of the Earthquake Engineering Society of Korea
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• v.6 no.4
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• pp.1-6
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• 2002

The structural safety required in general design is to be proved with safety factors provided for structural members in elastic range. But, for the safety requirement in the earthquake resistant design, a specific ductile failure mechanism in plastic range should be verified according to the structural configuration. Therefore such verifications should be done in the preliminary design stage by comparing various design alternatives. In the main design stage only a confirmation of the ductile failure mechanism is required. In this study typical roadway bridges are selected and analysis models are presented for the preliminary and main design. For the two models, vibration periods and mode shapes are compared and the multi-mode spectrum method is applied to determine failure mechanisms. The failure mechanisms obtained with the two models are compared to check the properness of the model used for the preliminary design, which may well be used as an earthquake resistant analysis model in practice.

• Journal of the KSME
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• v.25 no.4
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• pp.304-311
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• 1985

원자력발전소는 사고시 주변의 인구 및 환경에 미치는 영향의 심각성을 고려하여 가능한 모든 안전조치를 취하여 설계. 건설되도록 하고 있다. 특히 원자로냉각재 계통의 배관이 그러하며 고도의 안전성 및 신뢰성을 확보하기 위하여 지진에 대해서도 구조적인 건전성이 입증되어야 한다. 일반적으로 지진하중에 대한 배관계통의 내진해석에서는 층응답스펙트럼에 의한 모우드 해석 방법이 이용되고 있다. 이 때 내진해석으로 얻어진 응답의 조합에는 신중한 고려가 필요 하다. 즉 배관계통의 특성, 입력지진의 특성, 계산에 고려하는 모우드의 수등을 감안하여 적절한 응답조합이 이루어져야 한다. 본 해설에서는 여러 가지의 응답조합방법과 해석시 고려되는 모 우드의 수를 제한함으로써 발생하는 오차를 보정하기 위한 누락질량효과(missing mass effect)에 대하여 설명하고자 한다. 또 두 가지의 해석모델에 대하여 실제 내진 해석을 수행하여 그 결 과를 비교검토하기로 한다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2017.11a
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• pp.145-146
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• 2017

최근 세계적으로 많은 지진이 발생하고 있으며 기상이변으로 인한 자연재해로 인해 주요 시설물들의 안전성에 관한 관심이 증가하고 있는 추세이다. 특히 비구조 요소의 경우 구조 요소보다 건설 초기 투자비용이 높아 지진이 발생하였을 때 많은 피해가 발생할 가능성이 있으며 비구조 요소의 파괴는 심각한 2차피해로 발전 될 수 있으므로 내진안전성 평가는 반드시 이루어져야 한다고 볼 수 있다. 따라서 본 연구에서는 압착식 조인트의 접촉을 고려한 수계소화설비 파이프라인의 내진성능 평가를 위한 비선형 유한요소 모델을 구축하였다.

• The Journal of Sustainable Design and Educational Environment Research
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• v.15 no.1
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• pp.11-18
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• 2016

The purpose of this study is to develop the evaluation model of school facilities in terms of seismic performance during safety education in the school field. This study is composed of four stages with a view to developing user oriented evaluation models that can be utilized during earthquake safety education on ceiling system. and First stage analyze the evaluation guidelines to find evaluation methods and items. Based on the items, site survey was conducted to derive the characteristics of seismic performance of domestic school buildings in terms of ceiling system. Third stage analyzes the seismic performance of ceiling system. Final stage is to derive recommendations based on the results.

• 월간 기계설비
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• s.247
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• pp.58-59
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• 2011

주헌건설(주)은 지난해 6월 자체 개발한 내진 스프링가대가 특허(제10-0962993호)를 획득함에 따라 본격생산에 들어갔다. 내진 스프링가대는 펌프 등 실비기기의 자체진동을 방지하고 지진 발생시 충격을 흡수해 산재사고 예방 및 내진 안전성을 확보하는 장치이다. 이 제품은 지난 2010년 10월 "제4차 UN 재해위험 경감을 위한 아시아 각료회의"의 부대행사로 열린 재해경감 방재산업전에 출품해 호평을 받았다. 또한 배관의 신축 팽창을 자체 흡수하고 각종 슈 대신 절연 유볼트로 시공하므로 원가절감 효과가 있으며 타 공정과의 간섭 없이 시공할 수 있는 장점이 있다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.6
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• pp.138-147
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• 2018

With the recent series of damage caused by earthquakes in Korea, such as Gyeongju and Pohang, we know that Korea is no longer a safe zone for earthquakes and that we need to be prepared for them. In addition, bridges built prior to the introduction of seismic design concepts remain without adequate seismic reinforcement measures, and earthquake reinforcement should be performed efficiently considering economic and structural safety. Preliminary assessment of seismic performance of existing bridges is divided into four seismic groups, taking into account seismicity, vulnerability and Impact, considering the magnitude of the existing bridge's seismic, and prioritization for further evaluation of seismic performance. In this study, unlike the existing anti-seismic reinforcement priority method, scores are calculated based on the seismic design criteria applied to bridges, importance coefficient of the bridge including the zone coefficient and the Importance, vulnerability index of the bridge including the soil condition and the elapsed years, detail coefficient of the bridge including the superstructure form, the span length, the width, the height, the design load, and the daily traffic volume. The calculated score items will be weighted and grouped according to the results. Using this, a simpler and more efficient algorithm was proposed to determine the priority of seismic reinforcement on a bridge.

• Journal of Korean Association for Spatial Structures
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• v.12 no.2
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• pp.55-63
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• 2012

This study is about earthquake-proof reinforcement through structural function evaluation of an school building. The purpose of this study is to comparatively analyze structure reinforcement measures in consideration of safety and usability through structural function evaluation of school buididng, to offer rational measures for earthquake-proof function and to provide help in maintaining safe structures against earthquake. For this purpose, was selected for this study as an existing school building, earthquake-proof function evaluation was conducted, and measures to reinforce earthquake-proof function was offered. As for the research method, the first and the second earthquake-proof function evaluations were conducted which is an existing reinforced concrete school building. Through the abovementioned methods, earthquake-proof function evaluation were conducted, the results were analyzed and the measure to reinforce earthquake-proof function were offered(Steel damper, Carbon plate stiffeners). The offered measure to reinforce earthquake-proof function was applied to the subject structure, and comprehensive results were derived from earthquake-proof function evaluation regarding before and after earthquake-proof function reinforcement.