斜放网格棱柱面密肋折板网壳的静力特性分析  

Static characteristics and parametric analysis of folded-plated ribbed shells with inclined grid cylindrical surfaces

作　　者：朱锐 张华刚[1] 陈寿延 姜岚[1,2] 唐攒辉 ZHU Rui;ZHANG Hua-gang;CHEN Shou-yan;JIANG Lan;TANG Zan-Hui(Spatial Structure Research Center,Guizhou University,Guiyang 550003,China;School of Civil Engineering,Hunan University,Changsha 410012,China)

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550003 [2]湖南大学土木工程学院,湖南长沙410012

出　　处：《广西大学学报（自然科学版）》2019年第5期1296-1308,共13页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51568012);贵州省科学技术基金资助项目(黔科合J字[2008]2112号)

摘　　要：为了解斜放网格混凝土棱柱面密肋折板网壳静力特性,采用有限元法计算了32个算例,通过有限元参数化分析考虑了结构的矢跨比、斜向密肋梁刚度、脊线梁刚度、主拱梁刚度、边梁刚度、屋面板厚度对结构静力特性的影响。分析表明:屋盖具有较好的刚度和空间受力特性,且主拱和斜向密肋是屋盖中的主要受力构件;矢跨比对屋盖最大挠度的影响较大,并且随着矢跨比增大结构内力呈现下降趋势,建议矢跨比取1/6~1/4;提高斜向肋刚度有利于提高屋盖整体刚度,建议斜向肋截面高度取屋盖跨度的1/60~1/45;脊线梁的截面刚度对相连的斜向肋轴力影响较大,建议脊线的截面高度按屋盖跨度的1/65~1/34;主拱刚度对屋盖整体刚度贡献较大,建议主拱的截面高度取屋盖跨度的1/51~1/36;边梁刚度在整体结构中的贡献不大,可取边梁跨度的1/20~1/15为边梁的截面高度;屋面板厚在满足使用情况下不应取值过大。In order to understand the static characteristics of the inclined reinforced concrete shells of the inclined concrete,the finite element method is used to calculate 32 examples.The finite element parametric analysis considers the effects of the height-to-span ratio of the structure and the stiffness of the oblique rib beam,ridge beam stiffness,main arch beam stiffness,side beam stiffness,roof panel thickness on the static characteristics of the structure.The analysis shows that the roof has good stiffness and space stress characteristics,and the main arch and oblique rib are the main force members in the roof;the span ratio has a greater influence on the maximum deflection of the roof,and the height-to-span ratio increases the internal force of the structure and shows a downward trend.It is recommended to take the ratio of the span to 1/6~1/4.Increasing the stiffness of the oblique rib is beneficial to improve the overall stiffness of the roof,it is recommended that the height of the oblique rib should be taken as 1/60~1/45 of the span of the roof;the section stiffness of the ridge beam has a great influence on the axial force of the connected oblique rib.It is recommended that the section height of the ridge line is 1/65~1/34 of the roof span;the main arch stiffness contributes greatly to the overall stiffness of the roof,it is recommended that the height of the section of the main arch is 1/51~1/36 of the span of the roof;the stiffness of the side beam does not contribute much to the overall structure,and the span of the side beam is 1/20~1/15 of the height of side beam;The thickness of the roof panel should not be too large when it is used.

关 键 词：混凝土 斜放网格密肋折板网壳 静力特性 参数分析 

分 类 号：TU311.3[建筑科学—结构工程]