张弦结构在景德镇游泳馆中的应用

Application of string structure in Jingdezhen swimming center

景德镇游泳馆建筑造型近似椭球形,建筑内部设置比赛池和训练池两个无柱大空间,室内不吊顶,屋盖结构外露,因此对屋盖钢结构的美观性和规则性要求较高。经过多方案比选和优化,比赛池屋盖采用鱼腹形张弦梁结构,训练池屋盖采用半圈弦支穹顶结构。本文介绍了景德镇游泳馆屋盖钢结构的选型和优化过程,阐述了半圈弦支穹顶结构分析和设计的关键问题,介绍了屋盖钢结构的静动力特性、极限承载能力和关键节点构造。分析结果表明,当半圈弦支穹顶环索锚固处的结构具有足够的抗侧刚度时,索撑结构有效提高屋盖钢结构的竖向刚度,减小屋盖结构对其支承结构的水平推力。结构构件的创新布置突出建筑概念,实现结构构件建筑化。

Jingdezhen Swimming Center has an ellipsoid shape. The competition pool and the training pool are the most important spaces of the building. It doesn’t install suspended ceiling, so a good look is very important to the roof structure. After a multi-program comparison and optimization, beam string structure with fish shape is adopted for the roof of the swimming pool and half-round suspen-dome structure is adopted for the roof of the training pool. The process of selection and optimization of the roof structure, key issues of analysis and design for half-round suspen-dom-eare introduced. The analysis of static and dynamic characteristics, ultimate bearing capacity of roof structure and the construction of key nodes are introduced too. The analysis results show that cables and struts can improve the vertical stiffness of roof structure and reduce the horizontal force to the supporting structure when the lateral stiffness of supporting structures at the ends of half ring cables is enough. The architectural concept of the building is integrated in the structural components.