装配式预应力混凝土分体箱梁模型修正及参数分析  

Research to Model Modification and Parametric Analysis of Fabricated Pre-stressed Concrete Detached Box Girder

作　　者：蒋亮 贾圣东 李永 戴江波 高庚元 JIANG Liang;JIA Sheng-dong;LI Yong;DAI Jiang-bo;GAO Geng-yuan(Guizhou Expressway Group Co Ltd,Guiyang 550004,China;China Railway Major Bridge Engineering Group Co Ltd,Wuhan 430050,China)

机构地区：[1]贵州省高速公路开发集团有限公司,贵州贵阳550004 [2]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《土木工程与管理学报》2018年第2期110-115,共6页Journal of Civil Engineering and Management

摘　　要：本文基于静力载荷试验,对装配式预应力混凝土分体箱梁进行了模型修正及参数分析。对梁厂预制小箱梁进行静力加载试验并采集数据;利用Ansys建立小箱梁的精细化有限元模型,基于试验数据对数值模型作出优化修正;针对修正后的小箱梁进行参数分析,以选用的功能函数评价装配式预应力混凝土分体箱梁抗裂参数指标。研究结果表明:腹板厚度对于装配式预应力混凝土分体箱梁的正截面抗裂性能影响相较其它几何参数更为明显,施工过程中应予以严格控制;混凝土弹性模量在材料参数中影响效果较其它更为明显,因而混凝土的浇筑和振捣等工艺较为重要。This research is to conduct a model modification based on static loading experiments and a parametric analysis to fabricated pre-stressed concrete detached box girder.The static experiment of box girders prefabricated by beam plant was performed;Meticulous box girder finite element models were established by ANSYS,and model modification was optimized and implemented based on experimental data;A parametric analysis of modified box girder models was conducted and parameter indexes aimed at anti-crack ability of box girders was evaluated by the selected performance function.The results show that effect of web thickness on anti-crack resistance for normal section of box girders is more obvious than other geometrical parameters,thus in demand of rigid control during construction process.Since elastic modulus of concrete plays a more important role in anti-crack resistance than other material parameters,pouring and vibrating should be paid more attention.

关 键 词：预应力混凝土分体箱梁 静力载荷试验 模型修正 参数分析 抗裂性评价 

分 类 号：TU375.4[建筑科学—结构工程]