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)建筑設(shè)計(jì)研究院 上海 200092)
【提要】 用三維殼體有限元對(duì)拱在局部荷載作用下的受力狀態(tài)進(jìn)行分析，得到拱在不同矢跨比和不同支承條件下的豎向位移和內(nèi)力變化規(guī)律，并與平面桿系有限元結(jié)果進(jìn)行了比較。通過(guò)線性回歸分析得到局部荷載等效分布寬度的計(jì)算公式，使拱受局部荷載的空間計(jì)算問(wèn)題轉(zhuǎn)化為平面問(wèn)題，為工程設(shè)計(jì)提供了簡(jiǎn)化方法。
【關(guān)鍵詞】 拱  局部荷載 有限元 殼單元 等效分布寬度
Stress Analysis of Arch Under Local Load/Lu Haoliang1，Huang Daming2(1 College of Civ. Eng.,Tongji Univ.,Shanghai 200092,China; 2 Architectural Design and Research Institute,Tongji University, Shanghai 200092,China)
Abstract:The stress status of arch under local load is analyzed using 3D shell FEM.The variation regularity of arch crown's vertical displacement and bending moment in different ratio of vector height and arch span and different support condition are concluded. The results are compared with those of plane beam system.According to linear regression analysis based on calculating data, the formula of local load equivalent distribution width is proposed. So the 3D calculation problem is simplified to plane problem, which presents a simple method for engineering design.
Keywords:arch； local load； FEM； shell element； equivalent distribution width