Research On Response of Super Tall Buildings In Hilly Terrain

LI Zheng-liang;WEI Qi-ke;HUANG Han-jie;SUN Yi

Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (5) : 43-48.

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PDF(1739 KB)
Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (5) : 43-48.
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Research On Response of Super Tall Buildings In Hilly Terrain

  • LI Zheng-liang1;WEI Qi-ke1; HUANG Han-jie2; SUN Yi1

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Abstract

Abstract: Considerable changes of the amplitude and the spatial distribution of wind velocity take place under the interfering of hilly terrain. Wind load and response of super tall buildings at special location in hilly terrain is significantly different from that in flat terrain, therefore the current method of calculating wind-induced response of the super tall buildings in flat terrain may be unsafe under the condition of the hilly terrain. Previous researches were mainly focused on mean wind speed-up effect, and very few researches on the turbulent characteristic were referred to this subject. Besides, there is no comparison between the result of wind reduced response of super tall buildings in hilly terrain and that in flat terrain. In this paper, several kinds of 3D hill model, including bell, Gaussian and cosine shaped, are established by CFD software Fluent. Vertical profiles of mean velocity at crest are calculated under different hill slopes. According to the result of the numerical simulation, the great speed-up effect is found at the crest and the maximum speed-up ratio reach 1.7. The result of the numerical simulation is fitted by the inverse function very good. Compared to the experiment data, the simulation of the mean velocity is accurate, but the turbulence of the numerical simulation has a certain gap. Through a numerical example of the wind-induced response of a super-tall building, the effect of the hilly terrain can’t be ignored, and the displacement response of the super-tall building in hilly terrain increase 20% compared to in flat terrain.

Key words

Hilly terrain wind field / CFD / Wind tunnel test / Super tall buildings / Wind-induced response

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LI Zheng-liang;WEI Qi-ke;HUANG Han-jie;SUN Yi. Research On Response of Super Tall Buildings In Hilly Terrain[J]. Journal of Vibration and Shock, 2011, 30(5): 43-48
PDF(1739 KB)

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