New method for calculating wind-induced vibration of long-span cable roof structure

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (5) : 101-112.

MAO Jihua1,2， NIE Zhulin2， WANG Dayang1， XU Wei3， OU Tong4， CHEN Wei2， WU Fuchegn2

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Abstract

The wind-induced vibration response of long-span cable roof structures is complicated. Currently, one of the research focus is the applicability of the traditional equivalent static wind loads to calculate the wind-induced vibration response of long-span cable roof structures. This research focuses on four types of typical long-span cable roof structures: the concave type (the single-layer saddle-shaped cable net) and the convex types (the spoke-type double-layer cable net, the cable dome, and the string-supported dome), and all of them are tested by wind tunnel tests. Based on these data, two load value calculation modes and calculation procedures are proposed for the node dynamic wind load (Mode 1) and the area group dynamic wind load (Mode 2) by the nearest neighbor interpolation method, and are compared to the traditional equivalent static wind loads (Mode 3). The wind-induced vibration responses of four types of the typical cable roofs are studied with three different load value modes under four unfavorable wind direction angles. The results show that the wind vibration responses of the cable roof structure calculated based on Mode 1 and Mode 2 are respectively higher than that of Mode 3. In addition, it is more accurate to calculate the value of the node wind load of Mode 1, which reflects the actual wind load of the roof structure and effectively represents the actual wind-induced response of the roof structure. Furthermore, under the influence of no adjacent venues on the upstream and downstream, the average and fluctuating wind-induced displacement response cloud patterns of the concave and the convex cable roofs are relatively consistent, but their response sizes vary. The wind-induced displacement of the concave roof shows the tendency of gradually decreasing from the middle to the periphery, while the wind-induced displacement of the convex roof tends to increase from the central area to the middle ring and then reduce to the periphery.

Key words

cable roof / wind load / value mode / wind vibration response / wind coefficient

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MAO Jihua1,2， NIE Zhulin2， WANG Dayang1， XU Wei3， OU Tong4， CHEN Wei2， WU Fuchegn2. New method for calculating wind-induced vibration of long-span cable roof structure[J]. Journal of Vibration and Shock, 2023, 42(5): 101-112

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