布置倒U型与倒V型预应力筋的安全壳受力性能分析

发布时间：2018-05-23 13:04

本文选题：核电站安全壳 + 倒U型预应力筋　；参考：《工业建筑》2016年12期

【摘要】：以某核电站安全壳为背景,在原设计方案环向预应力筋和竖向预应力筋正交布置方式(HP-VTPT)与双向交叉螺旋线型预应力筋布置方式基础上,提出倒U型与倒V型预应力筋混合布置方式(IU-IVPT);基于安全壳混凝土的预应力一致原则,推导了由HP-VT-PT布置方式向IU-IV-PT布置方式转换的算式;选用大型通用有限元软件ANSYS,建立有限元实体模型,从顶点竖向位移、筒身径向位移和混凝土应力等方面分析,IU-IV-PT布置方式下安全壳受力性能与HP-VT-PT布置方式下受力性能基本一致,并采用等效荷载法验证了两种预应力筋布置方式是等价的,对其在水平荷载下进行推覆分析,结果表明:安全壳屈服时侧向位移和基底剪力屈服值分别提高64%和28%。
[Abstract]:Taking the safety shell of a nuclear power station as the background, the mixed arrangement mode of inverted U and inverted V prestressed tendons (IU-IVPT) is put forward on the basis of the original layout of the original design scheme and the layout mode of the prestressed reinforcement and vertical tendons (HP-VTPT) and the two-way cross spiral line prestressing tendons, and the prestress principle based on the concrete of the containment shell is derived. The formula of transforming from the HP-VT-PT layout to the IU-IV-PT arrangement is made, and the finite element software ANSYS is selected to establish the finite element model, from the vertical displacement of the vertex, the radial displacement of the barrel and the concrete stress, and the stress performance of the containment and the HP-VT-PT arrangement under the IU-IV-PT layout is basically the same. The equivalent load method is used to verify that the arrangement of two prestressing tendons is equivalent. The results show that the lateral displacement and the yield value of the base shear are increased by 64% and 28%. respectively.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点实验室;中国建筑股份有限公司技术中心;中建电力建设有限公司;
【基金】：中建二局有限公司科技研发课题(CSCEC2B-2011-K-02)
【分类号】：TU378

【相似文献】