Investigation of Wind Load Characte- ristics of Three-Plate Billboard Using Wind Tunnel Testing

Abstract:

With the rapid development of large outdoor billboards in recent years, their destruction resulted from the strong wind happen occasionally.A billboard is a typical wind- vulnerable high-rise structure with special open plates. The synchronous multi-pressure scanning measurement was conducted to the rigid model of a typical three-plate billboard. The statistical characteristics of net pressure distribution on the plates in different wind directions were comprehensively analyzed. Moreover,the envelop of the maximum positive and negative value of wind pressure in all wind directions are supplied and simplified. Furthermore, the shape factors of wind load distribution on the three plates and their simplified diagrams in most unfavorable wind directions were discussed and given. The change of wind force coefficients of overall three plates in different wind directions was analyzed as well. This paper provides basic data and wind load parameters for the wind resistant design of the plates and the supporting column of three-plate billboards.

Key words:three-plate billboards;wind tunnel test;wind pressure coefficient;shape factors;wind force coefficient