• 한국공간정보시스템학회:학술대회논문집
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• 한국공간정보시스템학회 2004년도 춘계 학술발표회 논문집 제1권1호(통권1호)
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• pp.245-251
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• 2004

This paper discuss the conditionally sampled actual wind pressure distributions causing peak quasi-static wind loads in the large span roofs using the wind pressures at many locations on dome models measured simultaneously in a wind tunnel. The actual extreme pressure distributions are compared itk load-response-correlation (LRC) method and the quasi-steady pressure distributions. Based on the results, the reason for the discrepancy in the LRC pressure distribution and the actual extreme pressure distribution are discussed. Futhermore, a brief discussion is made of the equivalent static wind load estimation for the large span roofs.

• 한국공간구조학회논문집
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• 제6권1호
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• pp.83-90
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• 2006

Gust Factor법은 구조물의 등가정적 풍하중을 평가하는 일반적인 방법으로 구조물의 최대 응답시의 풍하중의 분포가 평균풍하중의 분포와 동일한 형상을 가진다는 가정하에 적용한다. 그러나 대스팬 구조물의 경우 평균 풍하중의 형상과 변동 풍하중의 형상이 다를 수 있어 1차모드뿐 아니라 고차모드의 영향을 고려하여 구조물의 풍응답과 풍하중을 산정하여야 한다. 본 논문에서는 등가정적 풍하중을 산정하기 위하여 현재 사용되고 있는 Gust Factor 법 (GF법), Load-response-correlation법 (LRC법)에 대해 고찰하고, Advanced Conditional Sampling 법 (ACS법)을 제안하였다. ACS법은 최대하중효과를 나타내는 순간에 선택된 풍압분포와 구조물의 동적거동에 의해 발생한 관성력을 합성하여 등가정적풍하중을 산정하는 방법이다. 최대하중 효과는 풍동실험에서 얻어진 풍압데이터를 이용하여 시간이력해석으로 평가한다. 제안된 ACS법과 기존의 GF법 및 LRC법을 지붕 구조물에 적용하여 등가정적 풍하중을 산출하고 이를 상호 비교 분석함으로써 ACS법의 유효성을 검증하고자 한다.

• Wind and Structures
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• 제25권5호
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• pp.493-506
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• 2017

Wind-induced response behavior of long-span roof structures is very complicated, showing significant contributions of multiple vibration modes. The largest load effects in a huge number of members should be considered for the sake of the equivalent static wind loads (ESWLs). Studies on essential matters and necessary conditions of the universal ESWLs are discussed. An efficient method for universal ESWLs on long-span roof structures is proposed. The generalized resuming forces including both the external wind loads and inertial forces are defined. Then, the universal ESWLs are given by a combination of eigenmodes calculated by proper orthogonal decomposition (POD) analysis. Firstly, the least squares method is applied to a matrix of eigenmodes by using the influence function. Then, the universal ESWLs distribution is obtained which reproduces the largest load effects simultaneously. Secondly, by choosing the eigenmodes of generalized resuming forces as the basic loading distribution vectors, this method becomes efficient. Meanwhile, by using the constraint equations, the universal ESWLs becomes reasonable. Finally, reproduced largest load effects by load-response-correlation (LRC) ESWLs and universal ESWLs are compared with the actual largest load effects obtained by the time domain response analysis for a long-span roof structure. The results demonstrate the feasibility and usefulness of the proposed universal ESWLs method.