（1 北京市建筑设计研究院有限公司， 北京 100045； 2 万达文化旅游规划研究院有限公司， 北京 100022; 3 成都基准方中建筑设计有限公司， 成都 610021)

［摘要］结合特殊的建筑功能需求及建造的经济性，成都万达城娱雪乐园屋盖结构采用排架柱+立体管桁架结构方案，立体管桁架采用倒三角形形式，最大跨度达174m，两端通过抗震球支座连接于排架柱柱顶；为减小因支承点与桁架截面形心偏离产生的较大水平力，优化桁架支承点的高度，支承屋盖的排架柱截面高度达3m；为充分利用材料性能，柱截面采用工字形混凝土截面，垂直框架方向采用双梁与排架柱连接形成框架；为确保简化计算模型的准确性及合理性，选取典型单元进行实体模型及杆系模型受力对比研究。分析结果表明，简化模拟的计算结果准确合理；连系桁架在减小下弦龙骨跨度的同时提高了立体桁架的冗余度，在防连续倒塌性能的提高方面得到体现。

［关键词］立体管桁架； 排架； 水平推力； 防连续倒塌

中图分类号：TU391文献标识码：A文章编号：1002-848X(2018)20-0098-04

Study on structural system of large-span roof of Chengdu Wanda Ski Resort Amusement Park

Bu Longgui1, Shi Luye2, Hu Zhenjie3, Zhu Zhongyi1, Qin Kai1, Wang Siyang1, Liu Hua1, Ge Dongdong1

(1 Beijing Institute of Architectural Design, Beijing 100045, China; 2 Wanda Cultural Tourism Planning and Research Institute Co.,  Ltd.,  Beijing 100022, China; 3 Chengdu Datum Fangzhong Building Design Co.,  Ltd.,  Chengdu 610021, China)

Abstract:Combining the special architectural function requirements and the economical construction, the roof structure of Chengdu Wanda Ski Resort Amusement Park adopts the bent column+three-dimensional tube truss structure scheme. The three-dimensional tube truss adopts the inverted triangle form with a maximum span of 174m and the two ends are connected at the top of the bent column through seismic ball bearings. To reduce the large horizontal force caused by the deviation of the support point from the centroid of the truss section, the height of the truss support point was optimized, and the height of the frame pillar supporting the roof is 3m. To make full use of  material properties, the column section adopted the I-shaped concrete section, and the vertical frame direction was connected by the double beam and the frame column to form the frame. To ensure the accuracy and rationality of the simplified calculation model, the typical units of the solid model and the linkage model were selected for stress comparison study. The analysis results show that the  simplified simulation is accurate and reasonable. The connecting truss can reduce the redundancy of the three-dimensional truss while reducing the span of the lower keel, and it is reflected in the improvement of the progressive collapse resistance.

Keywords:three\|dimensional tube truss; bent; horizontal thrust; progressive collapse resistance

作者简介：卜龙瑰，硕士，高级工程师，一级注册结构工程师，Email：99790522@qq.com。