预应力混凝土连续梁桥预拱度多因素敏感性分析  

Multi-factor Sensitivity Analysis of Pre-camber of Prestressed Concrete Continuous Girder Bridge

作　　者：李宁波 张记涛 王嘉昕 万杨旭 LI Ningbo;ZHANG Jitao;WANG Jiaxin;WAN Yangxu(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《安徽建筑大学学报》2020年第3期1-5,共5页Journal of Anhui Jianzhu University

基　　金：安徽省高等学校自然科学研究一般项目(KJ2017JD03)。

摘　　要：以2座大跨预应力混凝土连续梁桥为例,对其预拱度进行多因素敏感性分析。选取了混凝土容重、弹性模量、预应力、环境相对湿度4个影响预拱度的因素,采用正交分析方法,运用有限元软件Midas Civil进行计算分析。研究结果表明,混凝土容重、预应力与弹性模量是影响预拱度的主要因素,湿度是影响预拱度的次要因素,各参数敏感性大小依次为混凝土容重、预应力、弹性模量、环境相对湿度。为大跨度连续梁桥的施工监控提供了科学依据。Two long-span prestressed concrete continuous girder bridges taken as examples,this paper analyzes the multifactor sensitivity of its pre-camber. Four factors affecting pre-camber, including concrete density,elasticity modulus,prestress and environmental relative humidity,are selected. Orthogonal analysis method is adopted and finite element software Midas Civil is used for calculation and analysis.The results show that the concrete density,prestress and elasticity modulus are the main factors affecting pre-camber,and humidity is the secondary factor affecting pre-camber.It provides a scientific basis for the construction monitoring of long-span continuous girder bridge.

关 键 词：大跨预应力混凝土连续梁桥 预拱度 多因素敏感性分析 正交分析法 施工监控 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]