横风向旋涡脱落共振响应分析及在规范上的应用

结构在风作用下 ,不但顺风向产生风振响应 ,而且横风向必然产生旋涡脱落风振。当横风向旋涡脱落频率与结构某阶自振频率一致时 ,结构产生极大的横风向共振 ,如不注意 ,结构将产生损坏或破坏 ,国内外有很多这类报导。本文基于国内外研究和规范资料 ,对本规范横风向共振依据的原理予以介绍 ,并对有关条文加以说明

Analysis of Across-wind Vortex Shedding Resonance and Its Application to Code

Under wind action, structural vibration occurs not only along wind direction but also across wind direction. In case the vortex shedding frequency is equal to a vibration frequency of structure,extreme vibration of structure occurs, which is very dangerous to structural safety. Based on domestic and international study information and codes, the theory of across wind vortex shedding resonance is introdused and relative clauses of Loading Code is illustrated in this paper.