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Topographical Factors for Wind Speed in Undulating Terrain: A Case Study for Korean Peninsula

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In this study, an analysis of topographical effects using five different codes was undertaken and four case studies for Korean Peninsula are presented. The five different codes are ASCE 7-05, AS/NZS 1170.2:2002, EUROCODE 2004, AIJ 2004, and KBC 2005. The present work investigates conditions to conjecture topographic factor effects using five different codes for undulating terrain in equally spaced eight wind directions. As a consequence of insufficient specifications from most wind codes, it is required to adopt parameter for upwind obstruction identified in ASCE 7-05 to other codes, which, in this paper, we called the mixing parameter method (MPM). This work compares topographic factors between the original codes and the codes using MPM in order to demonstrate the effects of undulating terrain, and also presented rationalized formula to comprehend the influential factors in each code. The resulting topographic factors are shown to be by the influence of different parameter in each code and slope of topography in the upwind direction.

Abstract

In this study, an analysis of topographical effects using five different codes was undertaken and four case studies for Korean Peninsula are presented. The five different codes are ASCE 7-05, AS/NZS 1170.2:2002, EUROCODE 2004, AIJ 2004, and KBC 2005. The present work investigates conditions to conjecture topographic factor effects using five different codes for undulating terrain in equally spaced eight wind directions. As a consequence of insufficient specifications from most wind codes, it is required to adopt parameter for upwind obstruction identified in ASCE 7-05 to other codes, which, in this paper, we called the mixing parameter method (MPM). This work compares topographic factors between the original codes and the codes using MPM in order to demonstrate the effects of undulating terrain, and also presented rationalized formula to comprehend the influential factors in each code. The resulting topographic factors are shown to be by the influence of different parameter in each code and slope of topography in the upwind direction.

참고문헌 (13)

  1. European Committee for Standardization, "“Eurocode 1: Action on structures-General actions-Part 1-4: Wind Action”, European Standard prEN 1991-1-4", ~ (2004)
  2. Architectural Institute of Korea, "Korean Building Code", ~ (2005)
  3. Architectural Institute of Japan, "AIJ Recommendation for Loads and Building", ~ (2003)
  4. Yukio Tamura, "Wind Resistant Design AIJ Recommendations for Wind Loads on Buildings", Lecture, 6, Tokyo Polytechnic University
  5. NZS 1170.2:2002, Wind Action, "A Guide to AS", pp.2005, Holmes, J.
  6. Choi, K.H., "A Wind Tunnel Test Study on The Characteristics on Wind Speed Distributions over Various escarpment shapes", Proc. WEIK, pp.70~75 (2000)
  7. Lee, S.W., "A wind tunnel test study on the characteristics of wind speed distribution over various two-dimensional hills", J. of WEIK, 4(1), pp.67~73 (2000)
  8. Kil, T.H., "Investigation on Pollutant Dispersion over a Single-Hill", J. of WEIK, 8(1), pp.35~42 (2000)
  9. Cho, K.P., "Wind Speed-up Effects over 3-Dimensional Hills", J. of WEIK, 10(2), pp.241~251 (2006)
  10. Cho. K.P., "Characteristics of Flow over Isolated Corn-type Hills", J. of WEIK, 12(1), pp.61~70 (2008)
  11. Choi, C.B., "Application of Immersed Boundary Method for Computations of Density-stratified Flow around 3D Topographical Terrain of WEIK", 10(1), pp.91~99 (2006)
  12. Lee, S., "Computational Assessment of Effects of Pollutant Dispersion from Tunnel Exit on Adjacent Topographical Terrain", Proc. WEIK, pp.39~43 (2004)
  13. American Society of Civil Engineers, "“Minimum Design Loads for Building and Other Structures”, ASCE 7-05", ~ (2006)

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