敦煌大剧院结构抗震设计

敦煌大剧院是一座具备国际专业水准的大型乙等剧院,可容纳1210席,主体结构采用钢框架-中心支撑结构体系,楼盖采用现浇混凝土楼板,楼板采用钢筋桁架楼承板。整体结构平面及竖向多项不规则,结合《建筑抗震设计规范》(GB 50011—2010)要求,采用三水准、两阶段设计方法,对结构进行详细的弹性和弹塑性分析。分析结果表明,整体结构具有良好的承载和变形能力,能满足"小震弹性,中震可修,大震不倒"的抗震性能化设计目标,并对结构的薄弱部位提出了有效的抗震加强措施。同时针对超长结构温度应力、楼座悬挑端舒适度、关键节点应力、舞台机械及声学设计等对结构设计的影响进行了专项分析。本项目的研究可为其他类似全钢结构剧院工程的结构设计提供参考。

Seismic design of Dunhuang Grand Theatre

Dunhuang Grand Theatre is a large-scale B-class theater with international professional standards,which can accommodate 1210 seats.The main structure adopts a steel frame-center support structure system.The deck slab adopts cast-in-place concrete floor slab and the floor slab adopts the steel truss floor support.The overall structure has multiple irregularities in the horizontal and vertical plane.Combined with the requirements of Code for seismic design of buildings(GB 50011—2010),the elastic and elastic-plastic seismic analyses of the structure were carried out using the method of three levels and two stages.The analysis results indicate that the whole structure has good bearing and deformation ability,and it can reach the seismic performance design aims of"elasticity under small earthquake,restoration under medium earthquake and uncollapsing under large earthquake".Effective seismic strengthening measures for weak parts of the structure were put forward.At the same time,special analyses were carried out on the influence of super-long structural temperature stress,comfortable degree of the cantilevered building,key node stress,stage machinery and acoustic design on structural design.The research of the project provides reference for the structural design of other similar theater steel structure projects.