大型户外广告牌抗风性能的力学分析和模型试验  

Mechanical Analysis and Model Test of Large-Scale Billboard under Wind Load

作　　者：刘明晖[1] 王琳[1] 

机构地区：[1]浙江建设职业技术学院建筑工程系,浙江杭州311231

出　　处：《实验室研究与探索》2014年第4期49-53,83,共6页Research and Exploration In Laboratory

基　　金：浙江省教育厅2010年度高校优秀青年教师资助计划项目(20100175)

摘　　要：利用有限元建模分析结合模型试验的方法,对大型户外广告牌在水平风荷载下的力学特性进行了分析,落地式三面独立柱广告牌结构在风荷载作用下受扭矩影响较大。分析3种工况中风荷载的最不利方向,并对结构刚度分布与振型及破坏模式的联系进行了探讨。通过模态分析发现,广告牌振动形式与结构刚度和质量分布相关,主要以立柱扭转和面板水平振动加转动为主,这与在模型试验时观察到现象基本吻合。The resistant behavior of large-scale billboard should be taken into consideration while design. The mechanical behavior of large-scale billboard under lateral wind load is analyzed by numerical simulation of FEA and model test. It is a significant concept to enhance the torsion resistance ability of billboard structure in order to reduce the disaster under wind load. The most unfavorable wind load in certain direction is also pointed out. The relationship between stiffness and mass distribution and structure failure model is discussed. Results show that the vibration model is related to stiffness and mass distribution , column torsion is the key matter, which is proven by model test. This results can be used for reference in engineering design.

关 键 词：大型广告牌 风荷载 力学分析 模型试验 

分 类 号：TU312[建筑科学—结构工程]