Wind pressures on permeably and impermeably-clad structures

被引:29
作者
Robertson, AP
Roux, P
Gratraud, J
Scarascia, G
Castellano, S
de Virel, MD
Palier, P
机构
[1] Silsoe Res Inst, Bedford MK45 4HS, England
[2] CEMAGREF, F-34033 Montpellier 1, France
[3] Univ Bari, I-70126 Bari, Italy
[4] CSTB, F-44071 Nantes 3, France
关键词
wind loads; porous cladding; netting; pressure coefficients; greenhouses;
D O I
10.1016/S0167-6105(01)00210-0
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The first European Standard for the design of commercial-production greenhouses passed through the formal voting stage in 2000 and its publication is imminent. For structural design considerations, it is based on the Eurocodes, and so for wind loading it is based on ENV 1991-2-4: 1995, although it provides additional information where specific data are available. During the drafting exercise, one deficiency identified in available wind loading information was that of pressure coefficient data for permeably clad structures. Greenhouses, particularly flat shading structures and curved roof houses, are often clad in permeable shade or insect-proof netting in southern Europe to reduce solar radiation gain and to increase ventilation. To facilitate reliable design of such structures, pressure data were obtained from large-scale tests conducted in the Jules Verne climatic wind tunnel at CSTB, Nantes, in November 1999. This paper reports the experiments conducted on an arch structure and on a flat-roof structure, where each was clad in turn in an impermeable plastic film, an 'insect net' of 33% open area, and a 'shade net' of 39% open area. The pressure coefficient data obtained with each cladding are compared for each of the two structural forms. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:461 / 474
页数:14
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