Classification and application of wind-resistant type of long-span roof structures
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According to the relationship among the mean response,background response and resonant response of wind-induced response,an idea is advised to classify long-span roof structures into four wind-resistant types,and the detailed classification criterions are developed.Systematic parameter analysis of wind-resistant types of long-span arch structures is performed with the presented method in this paper,by considering some parameters of wind loading and arch structures,such as mean wind velocity,roof mass,rise-span ratio and section properties of the arch,where wind pressure loads are obtained by wind tunnel test.The results show that: the parameters of the wind loads and the structure have important effect on structural response for long-span arch structures.The fluctuating wind-induced response can't be ignored,and most arch structures,whose first natural frequencies are lower than 4Hz,belong to the wind-resistant type that resonant response is more predominant than background response.