拱转换结构设计研究

发布时间：2018-05-30 09:12

本文选题：转换拱 + 转换结构　；参考：《建筑结构》2016年21期

【摘要】：广东现代广告创意中心工程因建筑平面中部有一栋建筑需保留,导致该建筑上方的结构须做转换。在分析了实腹梁转换结构以及桁架转换结构在本工程中存在的问题后,提出了一种新的转换结构形式——拱转换结构。与实腹梁相比较,拱转换结构具有截面小、自重轻、竖向变形小等优点;与桁架转换结构相比,结构扭转减小,楼层刚度突变减小。通过本工程实际案例分析可知,拱转换结构受力具有以下特点:拱的受力控制工况为竖向荷载;拱轴力只有压力;拱的第一阶屈曲模态为面外失稳;拱推力消散较快。转换拱是本工程最关键的构件,针对该构件的设计,专门制定了相应的技术措施。大震分析以及节点应力分析结果反映这些措施给结构的安全可靠性提供了很好的保证。最后给出有关大样节点图,希望能给类似工程设计提供一些参考。
[Abstract]:Guangdong Modern Advertising Center Project has a building in the middle of the building that needs to be preserved, so the structure above the building has to be converted. After analyzing the problems existing in the transfer structure of the solid web beam and the truss transfer structure in this project, a new type of transfer structure, the arch transfer structure, is proposed. Compared with the real web beam, the arch transfer structure has the advantages of small section, light weight and small vertical deformation, and compared with the truss transfer structure, the torsion of the structure decreases and the floor stiffness suddenly decreases. Through the actual case analysis of this project, it can be seen that the stress of the arch transfer structure has the following characteristics: the stress control condition of the arch is vertical load, the axial force of the arch is only under pressure, the first buckling mode of the arch is out-of-plane instability, and the arch thrust dissipates quickly. The transfer arch is the most important component of the project, and the corresponding technical measures are formulated for the design of the component. The results of large earthquake analysis and joint stress analysis show that these measures provide a good guarantee for the safety and reliability of the structure. Finally, the nodal diagram of the sample is given, which is expected to provide some reference for similar engineering design.
【作者单位】：广东省建筑设计研究院;
【分类号】：TU973.3

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