Experimental study on the influence of opening and closing of spacer skylights on the wind load on reticulated shell structures

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (6) : 176-183.

LI Yuqing1,WANG Xin1,LIU Xiaobing*1,2,3,CHEN Anjie1,CUI Huimin2,3,4

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Abstract

The large-span cylindrical reticulated shell structure is sensitive to wind load. The opening of spacer skylights at the top has a great influence on the wind resistance of the structure. In this paper, the large-span cylindrical reticulated shell structure is studied by the rigid model pressure measurement wind tunnel test method, and the influence of the opening and closing of the top spaced skylight on the shape coefficient, the overall force coefficient and the extreme wind pressure coefficient of the structure under different wind direction angles is analyzed. The results show that the opening and closing of the skylight has little influence on the wind load of the outer surface of the structure, but the influence of the wind load of the inner surface is obvious. The change of the wind load on the inner surface is the main reason for the variation of the wind load of the structure with the opening and closing of the skylight. Compared with the skylight is closed, the overall force of the structure increases by about 34% when the skylight is opened. This effect gradually weakens with the deviation of the incoming flow, and when the deviation is 60°, the effect is basically gone. The vertical overall force of the structure is smaller, with an amplitude reduction of about 47%, and this effect gradually weakens with the deviation of the flow from the span direction, but still exists even when the deviation is 90° (longitudinal flow). Compared with the skylight is closed, the positive extreme wind pressure of the structure increases when the skylight is opened, and the negative extreme wind suction decreases in most areas, but the negative extreme wind suction increases in some areas of the skylight.

Key words

large-span cylindrical reticulated shell structure / spacer skylight / wind tunnel test / overall force coefficient / extreme wind pressure coefficient

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LI Yuqing1, WANG Xin1, LIU Xiaobing1, 2, 3, CHEN Anjie1, CUI Huimin2, 3, 4. Experimental study on the influence of opening and closing of spacer skylights on the wind load on reticulated shell structures[J]. Journal of Vibration and Shock, 2025, 44(6): 176-183

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