（中国中元国际工程有限公司， 北京 100089）

［摘要］柬埔寨国家体育场罩棚悬挑跨度达65m，采用了新型的斜拉-张力结构体系。对罩棚结构体系进行了初始态、恒载、活载、风荷载、温度作用的计算，对罩棚结构的施工成形进行了模拟，对主要索夹节点进行了有限元分析，介绍了罩棚缩尺模型试验的主要结果。同时对罩棚结构开展了抗风专项设计研究，评估了设置TMD减振器对环索风致振动的减振效果；针对斜拉索和背索的风振问题，提出了设置黏滞阻尼器减振方案，并介绍了黏滞阻尼器参数的简化设计方法。计算分析结果表明，罩棚结构采用的新型结构体系承载力、刚度均满足设计要求；TMD减振器对于环索风振加速度有较好的减振效果；在斜拉索和背索上端设置黏滞阻尼器能有效提高索的附加阻尼比。

［关键词］柬埔寨国家体育场； 罩棚； 斜拉-张力结构； 索膜结构设计； 索夹节点； 减振

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2020)01-0015-08

Structural design for canopy of Morodok Techo National Stadium in the Kingdom of Cambodia

Zu Yizhen, Zhang Tongyi, Zhang Su, Wang Jitao, Meng Yongjie, Wang Wenyuan

(China IPPR International Engineering Co., Ltd., Beijing 100089, China)

Abstract:The cantilevered span of Morodok Techo National Stadium in the Kingdom of Cambodia is 65m, and a new type of cable-stayed tensile structural system was adopted. The initial state, dead load, live load, wind load and temperature action of the canopy structural system were calculated, the construction forming of the canopy structure was simulated, the main cable clamp joints were analyzed by finite element method, and the main results of the canopy scale model test were introduced. At the same time, the special wind resistant design of the canopy structure was carried out, and the effect of TMD damper on the wind-induced vibration of the loop cable was evaluated. Aiming at the wind-induced vibration of the stay cable and the back cable, the scheme of setting the viscous damper was proposed, and the simplified design method of the parameters of the viscous damper was introduced. The results of calculation and analysis show that the bearing capacity and rigidity of the new structural system used in the canopy structure meet the design requirements; the TMD damper has well damping effect on the wind-induced acceleration of the loop cable; the viscous damper is set at the upper end of the stay cable and the back cable to effectively improve the additional damping ratio of the cable.

Keywords:Morodok Techo National Stadium in the Kingdom of Cambodia; canopy; cable-stayed tensile structure; cable-membrane structural design; cable clamp joint; vibration reduction

作者简介：祖义祯，博士，高级工程师，一级注册结构工程师，Email：zuamanda@qq.com。