沿海地区高速铁路钢混组合梁的温度模式  

Temperature pattern of steel-concrete composite girder of high-speed railway in coastal area

作　　者：戴公连[1] 张强强 唐宇[2] 黄志斌 DAI Gonglian;ZHANG Qiangqiang;TANG Yu;HUANG Zhibin(School of Civil Engineering,Central South University,Changsha 410083,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,China;Southeast Coastal Railway Fujian Co.Ltd.,Fuzhou 350013,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410083 [2]中南大学资源与安全工程学院,湖南长沙410083 [3]东南沿海铁路福建有限责任公司,福建福州350013

出　　处：《华中科技大学学报（自然科学版）》2022年第8期142-148,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51708560);中国铁路总公司科技研究开发计划资助项目(2017G006-N);中央高校基本科研业务费专项资金资助项目(2020zzts151)。

摘　　要：为获取沿海地区高速铁路组合梁的温度分布和温度模式,结合泉州湾跨海铁路桥的实测数据建立了升温和降温情形下结构温度分量的时程模型,同时得到了钢混组合梁的正、负竖向温度模式.利用结构热流边界的等效方法,建立了钢混组合梁温度场的高效一维有限元模型,数值结果与实测数据、三维模型的计算结果最大误差分别为9.7%和4.3%,模型计算效率提高近30倍.通过对组合梁温度分布特征进行统计得到以下结论:降温情形下,混凝土板内温度场呈对角-双折线分布,钢混接触面出现温度反折点,差值为1.4℃,钢梁腹板温度场呈拱形分布;升温情形下,混凝土板内最不利正、负温度模式分别呈指数分布和线性分布,钢梁腹板温度场呈线性分布.To obtain the temperature distribution and temperature pattern of composite girder of high-speed railway in coastal areas,combined with the measured data of Quanzhou Bay sea-crossing railway bridge, the time history models of structural temperature component were established under conditions of heating and cooling. Meanwhile the positive and negative vertical temperature pattern of steel-concrete composite girder was obtained.Using the equivalent method of structural heat flow boundary,an efficient one-dimensional finite element model of girder thermal field was established. The maximum errors between numerical results and measured datas and results of a 3 D FEM are respectively 9.7% and 4.3%. The calculation efficiency of the model is improved by nearly 30 times.Through the statistics of temperature distribution characteristic of composite girder,the following conclusions are gained.Under the condition of cooling,the thermal field in the concrete slab is distributed with the form of diagonal-double broken line, the temperature inflection point appears on the steel-concrete contact surface, and the difference is 1.4 ℃ . The field distribution of the girder web is the arch shape. Under the condition of heating, the most unfavorable positive and negative temperature difference in concrete slab show exponential distribution and linear distribution respectively,and the field of web shows linear distribution.

关 键 词：高速铁路 钢混组合梁 时程模型 温度场模型 温度模式 

分 类 号：U239.3[交通运输工程—道路与铁道工程]