| Title |
Review on Topographic Factors over 3-Dimensional Hills |
| Authors |
Cho Kang-Pyo ; Hong Sung-Il ; Cho Gi-Sung |
| Keywords |
Topographic Factor ; Hills ; Wind Tunnel Test ; Distribution of Topographic Factors ; Wind Loads |
| Abstract |
This paper is a study at an early stage on topographic effects over 3-D hills. It aims at reviewing on topographic factors of worldwide major codes and standards, such as ASCE-7-02, AS/NZS 1170.2:2002, ISO4354(1997), and KBC(2005), which were established in each country considering its actual circumstances. Topographic factors from major codes and standards were compared each other for the same hill. Wind-tunnel experiments for a topographic model were performed topographic effects over 3-D hills and to compare the results from major codes and standards. The model employed for comparison has the slope of 16.7°.
In this study, topographic factors were obtained from wind tunnel tests. In the case of the slope of 16.7°, the topographic factor on the top of hill was 1.8. It was found that wind velocity increased by 20% at locations which lie beyond the effective range of topographic effects shown in the major codes and standards. Affected area from the experiment is wider than that from KBC(2005) |