成都市武侯区棕北中学音乐厅结构设计

Structural design of concert hall of Zongbei Middle School in Wuhou district of Chengdu city

成都市武侯区棕北中学西区实验学校扩建工程通过防震缝分为主楼与副楼两个子项,其中主楼为平面不规则的音乐厅。音乐厅结构具有下述典型特点:1)上部结构多处楼板开洞面积大于50%;2)大范围悬挑9m的看台大跨度封口梁采用了有粘接预应力技术;3)挡土墙受力复杂,设计时采取了等间距增设挡土墙翼墙的技术措施;4)舞台区屋面吊挂重载,钢结构屋面采用了抗震球铰支座点支承的平行弧形网格结构屋盖。本文从音乐厅的基础设计、钢屋盖设计、观众席预应力梁设计、挡土墙分析、结构整体计算等方面总结了该工程的结构设计要点。

The extension project of the experimental school in the west part of the Zongbei Middle School in wuhou district,chengdu city is divided into the main building and the auxiliary building through the seismic crack,among which the main building is a plane irregular concert hall.The structure of the concert hall has the following typical features:1)The cavity area of the superstructure is more than 50%;2)The long span sealing beam of the grandstand cantilevered 9 m stands has been bonded with prestressed technology;3)The force of retaining wall is complex,and the technical measures of adding the wing wall of retaining wall with equal spacing are adopted in the design;4)In the stage area,the roof is hung with heavy load,and the steel roof adopts the parallel curved grid roof supported by the anti-seismic ball hinge support.This paper summarizes the key points of structural design in the aspects of foundation design of concert hall,steel roof design,prestressed beam design of auditorium,analysis of retaining wall and integral calculation of structure.