• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.374.1-374
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• 2002

The eventual purpose of this research is to make optimum standards for acoustic-environment by using not only physical characteristics but also subjective appraisals. First, basic Physical data were measured which were necessary to establish standards for acoustic environment in campus buildings, TSP has used to measure sound levels, reverberation times, clearness indexes, and speech-transmission-index. (omitted)

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 추계학술대회 논문집
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• pp.357-363
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• 2011

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.548-549
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• 2009

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 춘계학술대회 논문집
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• pp.548-549
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• 2014

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 추계학술대회 논문집
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• pp.200-201
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• 2012

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.68-71
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• 2013

• Earthquakes and Structures
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• 제16권5호
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• pp.611-623
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• 2019

A set of mid-rise bare and uniformly infilled reinforced-concrete frame buildings are analyzed for two different seismic intensities of ground-motions (i.e., 'Design Basis Earthquake' and 'Maximum Considered Earthquake') to study their floor response. The crucial parameters affecting seismic design force for acceleration-sensitive non-structural components are studied and compared with the guidelines of the European and the United States standards, and also with the recently developed NIST provisions. It is observed that the provisions of both the European and the United States standards do not account for the effects of the period of vibration of the supporting structure and seismic intensity of ground-motions and thereby provides conservative estimates of the in-structure amplification. In case of bare frames, the herein derived component amplification factors for both the design basis earthquake and the maximum considered earthquake exceeds with their recommended values in the European and the United States standards for non-structural components having periods in vicinity of the higher modes of vibration, whereas, in case of infilled frames, component amplification factors exceeds with their recommended value in the European standard for non-structural components having periods in vicinity of the fundamental mode of vibration, and only for the design basis earthquake. As a consequence of these observations, as well as capping on the design force (in case of United states standard and NIST provisions), in case of the design basis earthquake, the combined amplification factor is underestimated for non-structural components having periods in vicinity of the higher modes of vibration of bare frames, and also for non-structural components having periods in vicinity of the fundamental mode of vibration of infilled frames. At the maximum considered earthquake demand, excepting non-structural components having periods in vicinity of the higher modes of vibration of bare frames, all provisions generally provide conservative estimates of the design floor accelerations.

• 대한인간공학회지
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• 제30권2호
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• pp.375-379
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• 2011

Objective: The aim of this paper is to introduce the Directive 2002/44/EC on the minimum health and safety requirements regarding the exposure of workers to the risks arising from vibration. Background: Human beings interact with machinery, and contact with vibration is commonplace. Unfortunately, continuous exposure to mechanical vibration can lead to physical injury. And standards are needed for identifying those at risk and for taking steps to mitigate the problem and reduce risk of injury. Method: The contents of the Directive were summarized and discussed, especially against its ISO counterparts. Results: The Directive deals with minimum safety and health prescriptions relative to workers' exposure to risks due to mechanical vibration. This directive specifies exposure limit values and action values. It also specifies employers' obligations with regard to determining and assessing risks, sets out the measures to be taken to reduce or avoid workers' exposure. Finally, it details how to make exposed workers aware of this issue. Conclusion: In spite of some limitations, it has recently been transcribed into all national laws of member States of European union. Application: The results of the paper might help to establish or update the domestic standards on vibration.

• 화약ㆍ발파
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• 제23권3호
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• pp.1-10
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• 2005

구조물의 발파진동에 대한 허용 수준 설정은 구조물의 반응 특성이 발파 진동의 특성과 전파 매질인 지반의 특성, 대상 구조물의 특성, 구조물의 기초 특성 등 여러 인파에 따라 달리 나타나므로 표준화된 기준을 적용하기는 쉽지 않은 일이다. 국외의 경우 영국, 독일, 스위스, 스웨덴과 같이 국가별로 허용수준에 대한 표준을 마련한 나라들도 있으며 아직 별도로 기준을 마련하지 않은 국가들도 많다. 우리나라는 통상 적용되고 있는 기준이 있으나 아직 국가 표준화는 되어 있지 않은 상황이며 민원 해결의 근거를 위한 합리적인 기준 마련의 필요성이 대두되고 있는 실정이다. 본 논문에서는 국가적으로 기준을 갖고 있는 미국, 영국, 독일, 스위스, 스웨덴 등의 사례와 개정 작업을 하고 있는 호주 및 브라질의 사례 분석을 통하여 다양한 형태의 기준들에 대한 특징을 파악하고 현행 사용되고 있는 국내 기준의 문제점을 고찰하였다.

• The Journal of the Acoustical Society of Korea
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• 제24권1E호
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• pp.7-15
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• 2005

This paper addresses issues encountered in measuring the general, 6-degree-of-freedom motion of a human head, A complete mathematical description for measuring the head motion using the six-accelerometer configured bite-bar is suggested, The description shows that the six-axis vibration cannot be completely obtained without the roll, pitch and yaw angular velocity components, A new method of estimating the three orthogonal (roll, pitch and yaw) angular velocities from the six acceleration measurements is introduced. The estimated angular velocities are shown to enable further quantitative error analysis in measuring the translational and angular accelerations at the head. To make this point clear, experimental results are also illustrated in this paper. They show that when the effects of angular velocities are neglected in the head vibration measurement the maximum percentage errors were observed to be more than $3 \%$ for the angular acceleration of the head and to be close to $5 \%$ for its translational acceleration, respectively. It means that the inclusion of all the angular velocity dependent acceleration components gives more accurate measurement of the head vibration.