大型户外广告牌面板极值风压分布的试验研究

大型户外广告牌作为城市典型的风灾易损性结构,在强风作用下的毁坏倒塌发生频繁,存在巨大的安全隐患。本文针对大型户外独立柱广告牌结构设计的薄弱环节,即广告牌面板的极值风压破坏,通过开展三种湍流度不同的风场的测压试验,考虑面板风压时程的高斯/非高斯特性,使用三种不同的极值风压计算方法,给出了极值风压与风场之间的联系,同时也比较了不同风场下这三种极值计算方法的优劣,对实际广告牌面板结构的设计以及广告牌面板易损性的研究有一定参考价值。

Experimental study on extreme wind pressure distribution of large outdoor billboard panels

As a typical structure vulnerable to a wind disaster,large-scale outdoor billboards collapse frequently under strong wind,which makes a huge potential safety hazard.This paper focuses on the weak link of structural design of large outdoor independent column billboard: damage of billboard panels under extreme wind pressure.The pressure measurement experiment of three wind fields with different turbulence degrees were carried out.Gaussian and non-Gaussian characteristics of panel wind pressure time history are considered,and three different extreme wind pressure calculation methods are use to obtain,the relationship between the extreme wind pressure and the wind field.Additionally,the advantages and disadvantages of the three extreme value calculation methods under different wind fields are compared.This study has a certain reference value for the structural design of billboard panels and the research of the damage probability of the billboard panel.