The Interference Effects on the design wind loads of high-rise buildings
| Autor: | Yi-Jong Lin, 林倚仲 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 High-rise 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 high-rise buildings. The increasing number of high-rise 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 high-rise 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 adjacent building casts significant interference effect on the design wind load in general. When the target building was located 3~4 width from the influence of building has the biggest design wind load. The presence of the adjacent building could have noticeable effect on the vortex shedding characteristics and consequently the vortex related wind loads. A design wind load modification procedure in consideration of the interference effects is derived based on the present study. The predicted wind load agrees well with the direct measurement when the geometry of the interfering building has only minor deviation from the model used in the current wind tunnel study. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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