济宁大跨度干煤棚网壳结构抗风及稳定性分析  

Wind resistance and stability analysis of large-span latticed shell structure for a dry-coal shed in Jining

作　　者：李军锐 杜文风[1] 袁秉银 王可为 刘智健 张平 LI Jun-rui;DU Wen-feng;YUAN Bing-yin;WANG Ke-wei;LIU Zhi-jian;ZHANG Ping(Institute of Steel&Space Structure,Henan University,Kaifeng 475004,China;Kaifeng Tianyuan Equipment Engineering Co.,Ltd.,Kaifeng 475004,China;Wuhan Zhenghua Architectural Design Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]河南大学钢与空间结构研究所,河南开封475004 [2]开封天元装备工程股份有限公司,河南开封475004 [3]武汉正华建筑设计有限公司,湖北武汉430000

出　　处：《空间结构》2023年第3期48-58,共11页Spatial Structures

基　　金：国家自然科学基金项目(U1704141,52178172);浙江省空间结构重点实验室开放基金资助项目(202106)。

摘　　要：以济宁市某大跨度干煤棚项目为背景,对结构的抗风和稳定性能进行了研究.首先为确定这种大跨度结构的风荷载取值,进行了风洞测压试验,获得结构的风压系数和风压,通过数据处理得到结构的极值风压,并进行数值模拟分析得到结构风致响应.之后,应用有限元软件ANSYS分别计算了结构的线性屈曲特征值、几何非线性及几何、材料双重非线性的极限承载力,讨论了不同初始缺陷值对结构极限承载力的影响.结果表明:结构主要在迎风面受风压力,在顶部和背风面受风吸力,其顶部的风吸力在0°风向角下达到最大;结构位移响应以竖向为主,在180°风向角时出现较大位移;结构在线性屈曲分析下的承载力较高,在不同初始缺陷下结构的极限承载力稍有降低,考虑几何和材料双重非线性后的结构承载力相较于线性分析降低了75%,但仍高于设计荷载,满足规范要求.Taking a large-span dry-coal shed project in Jining City as the background,the wind resistance and stability of the structure are studied.Firstly,in order to determine the wind load of this large-span structure,wind tunnel test is carried out to obtain the wind pressure coefficient and wind pressure of the structure.The extreme wind pressure is obtained by data processing and wind-induced response of the structure is obtained by structural numerical simulation.Secondly,linear buckling characteristics of the structure,geometrically non-linear and geometrically and materially non-linear ultimate load carrying capacity are calculated by using finite element software ANSYS,and the influence of different initial imperfections on the ultimate bearing capacity of the structure is discussed.The results show that the structure is mainly subjected to wind pressure on the windward side and wind suction on the top and leeward side of the structure.The wind suction on the top of the structure reaches the maximum at 0° wind angle.The displacement response of the structure is mainly vertical response,and large displacement occurs when the wind direction is 180°.The bearing capacity of the structure under the linear buckling analysis is higher,and the ultimate bearing capacity of the structure under different initial imperfections is slightly reduced.The bearing capacity after considering geometrical and material non-linearity is 75% lower than that under linear analysis,but it is still higher than the design load and meets the specification requirement.

关 键 词：大跨度网壳结构 干煤棚 风洞试验 稳定性分析 

分 类 号：TU393.3[建筑科学—结构工程]