范  重  尤天直  王春光  沈娅萍
    （中国建筑设计研究院  北京 100044）

[提要]  宁波国际会展中心主展厅大跨度屋盖支承条件复杂，风荷载效应显著。通过风洞试验确定屋盖的风压分布情况，在网壳结构的部分钢管中填充混凝土以平衡部分风吸力。采用抗震球形钢支座克服支座相对位移对屋盖结构产生的影响。
[关键词]  大跨度结构  网壳  风洞试验  特殊支座

The supporting conditions for the large span roof of Main Hall in Ningbo International Conference & Exhibition Center are very complicated, and response of the structure under wind loads is significant. The distribution of wind pressure on the roof is determined by wind tunnel test. The method that the hollow sections of structural members are filled with concrete for counteracting a part of upward wind forces is innovated. Special bearing-devices are adopted to overcome differential displacements between the bearings that are fixed on the tops of the five independent buildings and several cantilever columns extended from ground level.
Keywords:  large span structure; cylindrical gird shell; wind tunnel approach; special bearing