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 Under the action of wind, the structure not only produces wind-induced response in the downwind direction, but also wind vortex shedding in the crosswind direction inevitably. When the transverse vortex shedding frequency is consistent with a certain natural frequency of the structure, the structure will produce great transverse wind resonance. If not pay attention, the structure will be damaged or destroyed. There are many reports of this kind at home and abroad. Based on the domestic and foreign research and normative data, this paper introduces the principle of the transverse wind direction resonance of this code and explains the relevant provisions