（1 中国建筑设计研究院有限公司， 北京 100044； 2 华中科技大学土木与水利工程学院， 武汉430074；3 清华大学土木工程系， 北京100084）

［摘要］为研究南京未来花园单个树状结构的性能，采用ABAQUS软件进行建模，对结构进行了静力承载性能、影响因素和地震作用分析。结果表明：在最不利工况下，有机玻璃上肋的最大第一主应力小于3.5MPa，不锈钢结构处于弹性状态；温度变化对整体结构受力性能影响较小；节点失效时，有机玻璃面板的最大第一主应力增加了2.3MPa；结构整体刚度偏小，水平地震作用对单个树状结构的内力影响较小。采用滑动式支撑节点可有效地释放有机玻璃面板的温度作用；对于该树状结构，节点失效，结构仍然安全；单个树状结构可不考虑地震作用。

［关键词］南京未来花园；有机玻璃；不锈钢；单个树状结构；节点失效

中图分类号：TU399文献标识码：A文章编号：1002-848X(2021)10-0055-05

Single-tree structure design and load-bearing capacity of the Nanjing Future Garden

WU Hongru1, WANG Zongyi2,3, SUN Zhou1, WANG Yuanqing3

（1 China Architecture Design & Research Group Co., Ltd., Beijing 100044, China；2 School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China；3 Department of Civil Engineering, Tsinghua University, Beijing 100084, China）

Abstract:In order to study the load-bearing capacity of the single-tree structure of the Nanjing Future Garden, ABAQUS software was used to create the model. The analyses of static load-bearing capacity, influential factors, and earthquake effect on the structure were performed. The results show that the maximum principal stress on the acrylic is lower than 3.5 MPa and the stainless steel structure remains elastic in the worst working condition. Temperature variation has little effect on the mechanical performances of the structure. When the joints fail, the maximum principal stress on the acrylic panel increases 2.3 MPa. The stiffness of the structure is relatively small and horizontal earthquake barely affects the internal forces of the single-tree structure. The temperature effect of the acrylic panel can be released by using slip support joints. For the tree-shaped structure, it is safe although several joints fail. Seismic action cannot be taken into consideration for the single-tree structure.

Keywords:the Nanjing Future Garden;acrylic;stainless steel;single-tree structure;joint failure

*国家自然科学基金（51878377），中国博士后科学基金（2019T120097），住房与城乡建设部研究开发项目（2020-K-070），华中科技大学自主创新研究基金（2020kfyXJJS126）。

作者简介：邬红茹，学士，工程师，Email：wuhr@cadg.cn；通信作者：王综轶，博士后，讲师，Email: wangzongyi1990@126.com。