（中信建筑设计研究总院有限公司，武汉 430014）

 [摘要] 长江传媒大厦主楼建筑高度243m，采用框架—核心筒结构。结合建筑造型与使用功能要求，结构4层至6层局部采用桁架转换，并在14~17层及26~29层间采用斜柱转换（斜柱与竖向角度为20度）。为研究转换结构中关键节点的受力性能，选取4层转换桁架节点、14层边节点和角部节点等三种典型节点进行有限元分析。基于ANSYS软件建立节点有限元模型，分析时考虑混凝土和钢骨材料非线性。在与文献中模型节点试验结果对比验证的基础上，对转换结构中的三种典型节点进行了有限元分析，重点研究了节点区域变形与应力分布特性。有限元分析结果表明，在不利荷载组合作用下，三种典型节点中钢骨处于弹性受力状态，节点核心区混凝土工作性能良好，节点总体上安全可靠。

[关键词] 桁架转换；斜柱转换；关键节点；有限元分析；ANSYS

中图分类号：TU398+.9            文献标识码：A          文章编号：

作者简介：谭园，博士，工程师。Email：yuantan_tj@163.com。（联系方式：13618605958；027-82743244）

Finite element analysis on key joints of the main building of Yangtze River Media Mansion

Tan Yuan, Peng Ning, Wen Siqing, Zhang Zhigang, Xiao Haibing, Liu Dong

(CITIC General Institute of Architectural Design and Research Co.,Ltd., Wuhan 430014, China)

Abstract: A frame-core wall structural system is applied in the main building of Yangtze River Media Mansion, which is a super high-rise building with height of 243 meters. According to the requirements of architectural form and function, local truss transfer is used between the fourth to sixth floor, and inclined column transfer is adopted between the 14th to 17th floor and 26th to 29th floor, respectively (Note the angle between inclined column and vertical was 20 degree). Finite element analysis (FEA) on the transfer truss joint in fourth floor, edge joint and corner joint in 14th floor were carried out to investigate the loading performance of key joints in transfer structure. The material nonlinearity of steel and concrete was considered in ANSYS FEA. Based on validation of experimental results involved in the references, the performance of deformation and stress distribution in three typical joints were studied. FEA results indicated that steel remained in elastic and concrete of joint core area was in good condition under the unfavorable load combination. The joints were safe and reliable in general.

Keywords: truss transfer; inclined column transfer; key joint; finite element analysis; ANSYS

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