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目前预应力设计规范及相关规程均未对预应力次弯矩对结构受力的影响有明确说明。结合嘉东物流仓库二期工程,采用有限元分析软件,分析了次弯矩的分布特点以及次弯矩占使用阶段弯矩的比例,并对施工阶段不同张拉顺序对次弯矩的影响进行讨论,以控制并减少预应力施工阶段次内力对结构的不利影响,为相关工程预应力设计提供理论依据。
At present, neither the design norms of prestressing and related regulations have clearly explained the influence of prestressed sub moment on the force of structure. Combined with the second phase project of Jialong Logistics Warehouse, the finite element analysis software is used to analyze the distribution of secondary moment and the ratio of secondary moment to the moment of use, and the effect of different tension sequences on secondary moment in construction stage Discussion to control and reduce the negative impact of internal forces on the structure during the prestressed construction stage and provide a theoretical basis for the prestressed design of related engineering.