落地式高耸三面广告牌面板风压系数取值探讨

A Probe into Pressure Coefficient Values of Floor-standing Tall Threesided Billboard Panel

为准确计算正三角形广告牌面板上的风荷载,对比了《户外广告设施钢结构技术规程》(CECS 148:2003)和《建筑结构荷载规范》(GB50009-2012)中关于三面广告牌面板风载体型系数的取值和计算方法,并与正三角形三面广告牌的仿真分析结果进行比较,发现在不同的风向角下《户外广告设施钢结构技术规程》(CECS 148:2003)规定的风载体型系数最小,而仿真分析得到的风荷载压力系数最大。为保证结构的安全,基于仿真分析的结果,给出了三面广告牌风载体型系数建议值;同时考虑到风荷载的非平稳性和随机性,引入风荷载的偏心距系数,为落地式三面广告牌的设计提供参考。

Wind load factor values are analyzed in “Technical specification for steel structures of outdoor adver-tisement facility（CECS 148：2003）” and “Load code for the design of building structure（GB50009-2012）”. To accu-rately calculate wind loads of triangle three-sided billboard, factors were compared with simulation results of e-quilateral triangle three-sided billboard. Under different wind angles “Technical specification for steel structures of outdoor advertisement facility（CECS 148：2003）”specified minimum, and simulation analysis to obtain maximum wind load pressure coefficient To ensure the safety of the structure, the three-sided billboard wind load factor suggested value was given in this paper based on the results of simulation analysis. Wind load eccentricity factor is introduced, taking into account the non-stationary and randomness of wind loads, to provide reference for floor-standing three-sided billboard design.