（中国建筑西北设计研究院有限公司， 西安 710018）

［摘要］延安大剧院主体采用框架-剪力墙结构，双向超长，屋盖采用双向双层网架结构，并充分考虑风荷载和温度变化的影响。屋盖网架采用单体模型和整体模型分别计算的方法，取包络结果进行设计。框架柱（梁)上设置板式橡胶支座及成品双向滑动抗震铰支座，作为网架的支座，其有效减少了网架与主体之间的相互约束，使用效果良好。对转换柱、梁、桁架进行性能设计，提高抗震构造措施，保证其安全可靠。对于大悬挑和大跨度的混凝土构件，加设预应力筋，减少挠度和裂缝。根据分析结果，结构设计合理，可供设计参考。

［关键词］延安大剧院； 网架； 包络设计； 滑动支座； 性能设计； 预应力； 大悬挑； 大跨度

中图分类号：TU398-2文献标识码：A文章编号：1002-848X(2020)11-0027-06

Structural design of Yan′an Grand Theater

WANG Hongchen, ZHANG Tao, CHU Ling

(China Northwest Architecture Design and Research Institute, Xi′an 710018, China)

Abstract:The main structure of Yan′an Grand Theater is the frame-shear wall structure, which is two-way super long. The roof adopted two-way double-layer grid structure and fully considered the influence of wind load and temperature changes. The single model and the overall model were used to calculate the roof grids respectively, and the design was based on the envelope results. The laminated rubber bearings and the finished bidirectional sliding seismic hinge bearings were installed on the frame columns (beams) to serve as the support of the grid, which effectively reduces the mutual restraints between the grid structure and the main body, and it works well. In order to ensure the safety and reliability, performance-based design was conducted of the transfer column, beam and truss, and structural measures for seismic resistance were improved. For large-cantilever and large-span concrete members, prestressing tendons were added to reduce deflections and cracks. According to the results of the analysis, the structural design is reasonable and can be used for design reference.

Keywords:Yan′ an Grand Theater； grid; envelope design; sliding bearing; performance design; prestressing force； large cantilever； large span

作者简介：王洪臣，硕士，高级工程师，一级注册结构工程师，Email:317336513@qq.com。