先张法预应力空心板梁加固后抗弯承载力有限元对比分析  

The Finite Element Analysis and Comparison of Flexural Capacity of Strengthened Pretensioned-prestressing Concrete Hollow Slab Beam

作　　者：杨允宁 石春秀 YANG Yun-ning;SHI Chun-xiu(CCCC FIrst Highway Consultants Co.,Ltd.,Xi’an 710000,China;Baoji Construction and Installation Group Public Ltd.,Baoji Shaanxi 721000,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710000 [2]宝鸡建安集团股份有限公司,陕西宝鸡721000

出　　处：《兰州工业学院学报》2021年第4期9-13,共5页Journal of Lanzhou Institute of Technology

摘　　要：依托某改扩建项目,分析既有先张法预应力空心的抗弯承载能力,对抗弯承载能力不足的既有桥梁,采用3种不同的加固方法,进行加固前后的承载能力分析.利用Ansys有限元分析软件,对3种加固方法采用相应单元进行模拟,对比分析各加固方法对梁体的加固效果,确定出最优的加固方案,为有限元方法对加固方案的模拟提供参考,为先张法预应力板梁加固方案的选择提供理论依据.Based on a reconstruction and expansion project,the flexural bearing capacity of the existing pretensioned-prestressing hollow bridge is analyzed in this paper.For the existing bridge with insufficient flexural bearing capacity,three different reinforcement methods are used to analyze the bearing capacity before and after the reinforcement.Using ANSYS finite element analysis software,the three reinforcement methods are simulated with corresponding elements,and the reinforcement effect of each reinforcement method on the beam body is compared and analyzed,so as to determine the optimal reinforcement scheme.A reference for the simulation of reinforcement scheme by finite element method and a theoretical basis for the selection of reinforcement scheme of pretensioned-prestressing slab beams are provided in this paper.

关 键 词：先张法预应力空心板梁 加固设计 结构有限元分析 

分 类 号：TU378[建筑科学—结构工程]