杭州大剧院主舞台考虑线拉施工方案的计算分析

Analysis of Structural Performance in Hangzhou Grand Theater Considering the Construction Process

杭州大剧院采用大跨预应力混凝土框架结构。本文主要对该剧院主舞台中的多层预应力混凝土框架进行了考虑张拉施工方案的计算分析。结果表明 ,现行设计法所得的预应力综合弯矩和预应力次弯矩与实际值有较大的偏离。本文以保证按逐层法施工时现行设计法能满足框架控制截面的抗裂和承载能力要求 ,提出了修正方法。

Construction process of multi story prestressed concrete frames (MPCF) should be noted in structural analysis because the sequence of steel tension and concrete pouring directly affects on building mechanical model. But in general it is not considered during designing of MPCF. The calculated model of the main platform in the Hangzhou Grand Theater is analyzed considering the construction process. The key site is reinforced in order to satisfy the requirement of cracking capacity and bearing capacity of the prestressed frame.