整体空间桁架体系在某大跨悬挑结构中的应用研究

The Application Research of Overall Spatial Truss System in a Super Long-span Cantilever Structure

文章以某大跨悬挑工程为背景,对比分析了实腹工字钢钢梁体系、大跨平面圆管桁架体系、整体空间桁架体系等3种不同的大跨悬挑结构承重体系,最终选用整体空间桁架体系。系统阐述了其建筑造型特点及结构布置形式,并基于计算软件开展了受力性能计算分析。结果表明,整体空间桁架体系设置合理,在满足建筑功能造型的条件下,构件应力比均得到合理控制,结构安全冗余度较高。同时,结合建筑自身造型特点,重点介绍了本工程中应用的3种增强大跨悬挑结构抗倾覆性能的措施。文章对此类大跨悬挑结构提出的相关设计建议可供类似工程参考。

The article takes a large cantilevered project as the background,conducting a comparative analysis of three different load-bearing systems for large cantilevered structures:the solid-web I-beam steel beam system,the large-span planar circular tube truss system,and the integral spatial truss system.Ultimately,the integral spatial truss system is chosen.The article systematically elaborates on its architectural features and structural layout.It performs a force performance calculation analysis using computational software.The results indicate that the integral spatial truss system is reasonably configured,achieving reasonable control of component stress ratios and a high level of structural safety redundancy while meeting the conditions of architectural functional styling.Additionally,considering the architectural styling characteristics,the article emphasizes three measures applied in this project to enhance the overturning resistance performance of large cantilevered structures.The document provides relevant design suggestions for similar projects involving such large cantilevered structures.