884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200092)

［摘要］基于空氣相和雪相的關(guān)系為單向耦合的假設(shè)，采用了兩相流理論模擬了風(fēng)作用下雪的漂移過(guò)程。對(duì)通用流體軟件FLUENT進(jìn)行了二次開(kāi)發(fā)，計(jì)算了在風(fēng)作用下積雪發(fā)生遷移后屋蓋表面的雪壓分布，并對(duì)雪荷載改變量以及雪壓分布的規(guī)律進(jìn)行了分析，為結(jié)構(gòu)設(shè)計(jì)提供了依據(jù)。

［關(guān)鍵詞］大跨度屋蓋結(jié)構(gòu)；CFD；兩相流；雪漂；雪荷載

Study on snow loads on the roof of Beijing south station

Li Xuefeng, Zhou Xuanyi, Gu Ming

(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:Snow drifting in wind is considered as a twophase flow. The mixture of air and snow is assumed to be oneway coupled so that the air phase can be treated as unaffected by the airborne snow. The numerical simulation employs the commercial CFD software, FLUENT, with additional user C code added to model snow drift. The regularity of the redistribution of snow loads on the roof of Beijing south station is discussed, which provides a basis for design of structure.

Keywords:large-span roof; CFD; tow-phase flow; snow drifting; snow load

*國(guó)家自然科學(xué)基金創(chuàng)新研究群體科學(xué)基金(50621062)，國(guó)家自然科學(xué)基金(50608060)，同濟(jì)大學(xué)青年優(yōu)秀人才培養(yǎng)行動(dòng)計(jì)劃聯(lián)合資助。