长江防洪模型大厅结构设计与分析

长江防洪模型大厅干流大厅主体部分单跨90m,长450m,采用120m跨钢管提篮拱+吊杆+90m跨预应力网架杂交空间结构。通过采用提篮拱及其吊杆作为屋盖网架的中间支座,将网架单向90m跨受力变为双向90m×90m受力,充分发挥了网架空间受力的优势;并在网架下弦设置预应力拉索,提高了结构的空间刚度;这些措施使该工程取得了较好的经济效益和建筑效果。重点介绍了结构选型、布置及分析,以及拱基础和预应力钢结构节点及网架支座的设计。

Design and analysis of Changjiang River Model Hall structure

Changjiang River Model Hall is 90m wide and 450m long.A new type of hybridized structure is brought forward and applied to this hall,which is constituted of an 120m span steel arch,suspender and a 90m span prestressed grid structure.Through the middle support by the arch and suspender,the grid structure is transformed from uniaxial bending to biaxial bending,and the advantage of space performance is realized.Otherwise,prestressed cable is mounted under the lower chord of the grid to enhance the structure st...