2012年7月下 施工技术 第41卷第369期 CONSTRUCTIONTECHNOLOGY 117 深圳北站组合梁抗弯承载力及稳定性分析 吴兵，傅学怡，孟美莉，邵建伟，刘云浪 （深圳大学建筑设计研究院，广东深圳518060） 【摘要】组合梁抗寄承载力和稳定性分析对组合需的结构设计很关键，但组合钢粱上翼缘受混凝土楼板约束，其稳 定性分析应与我国现行规范规定的自由梁弯扭失稳不同，我国《钢结构设计规范》CB50017-2003采用限制绕弱轴 的长细比的方法，未能考虑楼板作用，不适用于组合钢梁稳定性分析。
此外，在连续组合梁的负弯矩区，局部稳定 性问题也要考惠。
结合深圳北站站房楼盖组合梁的工程实例，采用GB60017-2003和欧洲规范EC4，对组合策抗 奇承载力和稳定性进行计算分析，同时，利用通用有限元程序SAP2000对组合钢梁进行弹性屈曲分析，进一步确保 了结构的安全。
[关键询]火车站：组合梁；抗夸承载力：侧扭属曲；弹性感曲；局部稳定：分析 [中图分类号]TU318；TU375 [文献标识码]A [文章编号]1002-8498（2012)14-0117-04 Bearing Capacity and Stability Analysis for Steel-concrete CompositeBeams in ShenzhenNorthRailroadStation Wu Bing,Fu Xueyi,Meng Meili, Shao Jianwei, Liu Yuniang （The Iastitute of Architeture Design &Research Shenzhen Unisersity, Shenzhen,Guangdeng518060,China) Abstract:Analysis of flexural capacity and stability is important in the design of steel-conerete posite beams. Due to the constraint of concrete slab to the beam top flange, the stability of steel-conerete posite beam is diferent from free steel beams. The method adopted in the Code for design of steel structures GB50017-2003 considers instability by restricting the slenderness ratio about the beam wcak axis which takes no consideration for the effct of concrete siab.Therefore, It can not be adopted in the stability analysis of steel-concrete posite beams. In addition,local stability in the negative moment zone should be considered. In the Shenzhen North Railway Station project, GB50017-2003 and Eurocode 4 are adopted to analyze the flexural capacity and stability of steel-concrete posite beams. Apart from that, elastic buckling analysis was performed with finite element program SAP2000 to account for the instability problems mentioned earlier. This analysis ensured the structure security. Key words: railroad stations; posite beam; flexural capacity; lateral-torsional buekling; elasic buckling; local stability; analysis 0引言 梁在弯矩作用下的失稳仍采用普通自由梁工字钢 钢-混凝土组合梁是通过抗剪连接件将钢梁和 梁的稳定设计方法，没有考虑混凝土板对钢梁的约 钢筋混凝土板连接成整体共同工作的受弯构件。
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