预应力在大剧院工程中的应用

大剧院工程由于结构设计平面尺寸超长,结构楼层高低错落,体型多变,不宜设置结构缝;另外建筑结构设计空间大,设置了多层看台,中间设有超大升降舞台及乐池,导致结构本身自重大,跨度大,体积大,这就要求控制施工、使用阶段出现结构裂缝,因此在结构设计中采用了无粘结预应力及有粘结预应力技术,以改善钢筋混凝土结构的综合性能、承载能力及控制结构裂缝。

Applications of Prestress in Projects of Grand Theaters

Since the projects of grand theaters are with ultra- long plane dimension of structure design, high and low structures as well as variable shapes, so the structural joints are not suitable. Moreover, the design space of building structure is big as well as there are multilayer stands, super large lifting stage and orchestra in the center so that the structure itself is with great dead weight, span and volume. As a result, the structural joints are required to be controlled in constructions and applications. Thus,the technologies of unbonded prestress and bonded prestress are adopted in the, structure design to im- prove the comprehensive properties, bearing capacity and control structural joints.