游泳馆钢-木混合结构的体系选型和关键设计问题

System Selection and Key Design Issues for Steel-timber Hybrid Structure of Natatorium

摘要:

崇明游泳馆采用钢?胶合木混合网壳结构。通过对胶合木力学特性和游泳馆结构静力的分析，计算屋面网壳结构钢和胶合木的合理应用范围。讨论了钢夹板木结构连接节点刚度对结构整体刚度的影响，并通过节点试验得到了节点的实际刚度。参考《空间网格结构技术规程》中关于网壳结构的稳定性分析和极限承载力的计算方法，考虑木材的材质缺陷和无塑性发展能力，钢?木混合网壳结构的弹塑性极限承载力安全系数建议取4.2。

Abstract:

A steel-glulam hybrid reticulated shell structure is adopted in the Chongming Natatorium. Based on the analysis of the mechanical properties of glulam and the static force of the natatorium structure， the reasonable application range of steel and glulam for the reticulated roof is calculated. Then， the effect of the stiffness of steel splint-timber structure connection node on the overall stiffness of the structure is discussed， and the actual stiffness of the node is obtained by node experiments. Referring to “Technical Specification for Spatial Reticulated Structures” on the stability analysis and ultimate bearing capacity calculation method of the reticulated shell structure， due to the material defects and non-plastic development capacity of the timber， the safety factor of elasto-plastic ultimate bearing capacity for the steel-timber hybrid reticulated shell structure is recommended to be 4.2.