（中国建筑西南设计研究院有限公司， 成都 610042）

［摘要］成都东安湖体育公园体育场主体结构采用钢筋混凝土少墙框架结构，屋盖钢结构采用悬挑平面桁架+立面单层交叉网格。除西侧主席台看台区域外，均采用预制看台板；  突破常规，在29m标高桁架高度内设置300m长的高区观景平台及在16m标高单层网格交叉处设置两个约165m长的低区观景平台，其平台的竖向支承均为立面弧形交叉网格。在建筑南侧布置了四个为29m标高观景平台提供竖向交通用途的钢筋混凝土筒体。通过对结构进行静力分析、稳定性分析、地震弹性及弹塑性分析、节点分析、大跨楼板舒适度、结构抗连续倒塌等系列计算分析，保证了结构的安全、合理、经济。

［关键词］大悬挑；  平面桁架；  单层交叉网格；  观景平台；  少墙框架

中图分类号：TU245.1文献标识码：A文章编号：1002-848X(2020)19-0022-08

Structural design of Chengdu Dong′an Lake Sports Park Stadium

FENG Yuan, CHEN Wenming, ZHOU Quan, YAO Li, WU Pengcheng,  DENG Chen, XIANG Xin′an, DENG Kaiguo 

(China Southwest Architectural Design and Research Institute Co.， Ltd.,  Chengdu 610042, China)

Abstract:Chengdu Dong′an Lake Sports Park Stadium adopts reinforced concrete less-wall frame structure for its main part, and its steel structure of roof adopts cantilever plane truss and single-layer cross grid on facade. In addition to the platform area on the west side of the podium, prefabricated viewing platform slab is adopted. To break the conventional practice, a 300m long high area viewing platform is set within the truss height of 29m elevation, and two 165m long low area viewing platforms are set at the intersection of single-layer grid at the elevation of 16m. The vertical support of the platform is vertical arc-shaped cross grid. Four reinforced concrete cylinders are arranged on the south side of the building to provide vertical traffic for the 29.0m viewing platform. Through the static analysis, stability analysis, seismic elastic and elastic-plastic analysis, joint analysis, large-span floor comfort, anti-progressive collapse and other series of calculation and analysis, the structure is proven to be safe, reasonable and economic.

Keywords:large cantilever; plane truss; single-layer cross grid; viewing platform; less-wall frame

*国家重点研发计划基金资助（2016YFC0701204），中国建筑股份有限公司科技研发基金资助(CSCEC-2015-Z-43)。

作者简介：冯远，教授级高级工程师，Email:xnyfy@vip.163.com；  通信作者：周全，硕士，高级工程师，Email:283018109@qq.com。