基于多尺度模型的单层球面网壳结构静力稳定性分析  

Static Stability of Single-layer Spherical Reticulated Shell Structure Based on Multi-scale Model

作　　者：姜明龙 朱南海[1] 陈大龙 JIANG Ming-long;ZHU Nan-hai;CHEN Da-long(School of Architecture and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学建筑与测绘工程学院,赣州341000

出　　处：《科学技术与工程》2020年第11期4472-4477,共6页Science Technology and Engineering

基　　金：国家自然科学基金(51768024);江西省自然科学基金(20181BAB206039);江西省教育厅科技项目(GJJ160618)。

摘　　要：网壳等大跨度空间结构在实际工程中得到广泛运用,静力稳定性是结构安全分析的重要内容之一。为研究静力荷载作用下网壳结构的稳定性,以单层球面网壳结构为研究对象,基于多尺度有限元建模方法,通过分别采用薄弱区域节点细化模型、薄弱区域杆件细化模型和全梁单元模型对结构在静力荷载作用下的稳定性进行分析。结果表明,杆件细化与节点细化的多尺度模型可以跟踪杆件的局部凹陷和节点变形等,更接近实际,在结构静力稳定性的数值模拟方面具有更高的准确度。Large-span spatial structures such as reticulated shells are widely used in engineering. Static stability is one of the important contents of structural safety analysis. To study the stability of the reticulated shell structure under static loading, a single-layer spherical reticulated shell structure was scrutinized. The multi-scale finite element modeling method, weak-area joint refinement model, weak-area rod refinement, and full-beam element model were respectively applied for the analyses of the stability of the structure under static loading. Results show that the multi-scale model of rod refinement and joint refinement could track the local depression of the rod and the deformation of the joint, which was closer to the reality with higher accuracy in numerical simulation of structural static stability.

关 键 词：空间结构 静力稳定性分析 单层球面网壳结构 多尺度模型 薄弱区域细化 

分 类 号：TU393.3[建筑科学—结构工程]