大体积桥台分层浇筑水化热效应分析
Analysis of Hydration Heat Effect of Layered Pouring of Large-volume Abutment
刘婕妤 1田仲初1
作者信息
- 1. 长沙理工大学 土木工程学院,湖南 长沙 410004
- 折叠
摘要
以贵州省小乌江大桥桥台施工为背景,采用有限元软件midas FEA建立桥台施工仿真模型,考虑桥台内外部各种边界条件以及热荷载,针对水化热施工阶段模拟了桥台分层浇筑施工的过程,对大体积桥台分层浇筑的水化热效应进行研究.得出以下结论:分层浇筑的间隔时间对桥台施工中的最高温度影响不大,三种浇筑工况下(间隔 3、4、5 d),桥台内部升温过程中最高温度仅相差0.8℃和1.2℃;间隔时间较长的施工工况,表面应力反而稍大,三种工况下桥台最大应力分别是1.77、1.95、2.01 MPa.
Abstract
Relying on the background of the abutment construction of the Xiaowujiang Bridge in Guizhou Province,the finite element software midas FEA is used to establish the simulation model of the abutment construction.Considering various boundary conditions in-side and outside the abutment and thermal loads,the hydration heat construction stage is used to simulate the abutment stratification.In the process of pouring construction,the hydration heat effect of layered pouring of large-volume abutments is studied.The following conclusions are drawn:the interval time of layered pouring has little influence on the maximum temperature during abutment construc-tion.Under three pouring conditions(interval of 3,4 and 5 d),the maximum temperature in the internal heating process of abutment is only 0.8℃and1.2℃;Timeintervallongerconstructioncondition,thesurfacestresslargerinstead,threekindsofthepilecapsunder the condition of maximum stress respectively is 1.77,1.95,2.01 MPa.
关键词
大体积桥台/水化热/分层浇筑/间隔时间Key words
large volume abutment/heat of hydration/layered pouring/interval time引用本文复制引用
出版年
2024
NETL
NSTL
万方数据