The Interference Effects on the design wind loads of tall buildings（Ⅱ）
| Autor: | Chia-Kuo Wang, 王嘉國 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 Tall building plays an important role in the city development due to the limited land. In addition to the earthquake force, wind force becomes an important lateral design load for tall buildings. The increasing number of tall buildings in a large city makes the interference effects between the adjacent buildings becomes an important wind engineering problem. This paper investigates the interference effect on the design wind load of tall buildings. The wind tunnel experiments were conducted for different model geometry shapes and various model spacing in a grid system. The wind tunnel experiments can be categorized into two groups: (1) interference effects of inferring buildings with identical volumes but different cross-sectional shapes, (2) interference effects of inferring buildings have the same height but different building width. Design wind load were calculated for comparison. High frequency force balance was used to measure both the mean and dynamic wind loads. The interference factors for mean and dynamic wind loads on both along-wind and across-wind directions were evaluated. The experimental results indicate that the variation of the adjacent building width would cast more influences on the average wind-force than the building height especially when the interfering building locates at X/B =3, Y/B =0. Variation of the width and height of the upstream interfering building would cause significant change in the wind loads of the target building. When the interfering building locates in the region of X/B = 3~13, Y/B =0~4, the dynamic wind loads of the target building would be enhanced except when the interfering building locates very close to the target building. Incorporating the interference factors obtained from this research into the design wind loads for an isolated building, a more realistic and accurate design wind loads can be obtained. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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