[1]赵立财.预应力混凝土I型梁温度梯度分布规律[J].应用科技,2020,47(6):101-105.[doi:10.11991/yykj.202005009]
 ZHAO Licai.The distribution law of temperature gradient of prestressed concrete type I beams[J].Applied science and technology,2020,47(6):101-105.[doi:10.11991/yykj.202005009]
点击复制

预应力混凝土I型梁温度梯度分布规律(/HTML)
分享到:

《应用科技》[ISSN:1009-671X/CN:23-1191/U]

卷:
第47卷
期数:
2020年6期
页码:
101-105
栏目:
建筑工程
出版日期:
2021-01-31

文章信息/Info

Title:
The distribution law of temperature gradient of prestressed concrete type I beams
作者:
赵立财12
1. 台湾科技大学 营建工程系,台湾 台北 10607;
2. 中铁十九局集团有限公司,北京 100176
Author(s):
ZHAO Licai12
1. Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, Taipei 10607, China;
2. China Railway 19th Bureau Co., Ltd, Beijing 100176, China
关键词:
I型梁温度梯度试验设计温度测量应变测量截面不同深度分布规律
Keywords:
type I-beamtemperature gradienttest designtemperature measurementstrain measurementsectiondifferent depthdistributed rule
分类号:
U441
DOI:
10.11991/yykj.202005009
文献标志码:
A
摘要:
为解决现有公路桥梁设计规范中缺少的横向温度梯度效应的相关问题,本文对自然条件下3种不同结构尺寸的I型梁截面实测与预测温度梯度进行了比较,通过分析得出I型梁体截面底部V型区段凸缘部位为最大横向温度梯度的发生位置。研究表明,梁体横向不同区段部位混凝土受太阳辐射的不均匀加热会导致显著的非线性温度梯度,进而修正设计规范中主梁的垂直温度梯度,对设计规范中横截面温度梯度效应的相关内容做了有益补充,为今后混凝土桥梁温度梯度荷载的研究提供了可靠性依据。
Abstract:
In order to solve the problem of transverse temperature gradient effect lacking in the existing specifications, a comparative analysis of the measured and predicted temperature gradient in the section of type I-beam with three different structures under natural conditions was carried out, and it was concluded that the flange of the V-section at the bottom of the section of type I-beam was the location where the maximum transverse temperature gradient occurred. Research shows that the beam body transverse section different place concrete uneven heating by solar radiation can lead to significant nonlinear temperature gradient, the vertical temperature gradient and design code of fixed girder, the design of the cross section temperature gradient effect in the specification and the related content made a beneficial supplement for the concrete bridge temperature gradient load research provides a reliable basis. In order to solve the problem of transverse temperature gradient effect lacking in the existing specifications, a comparative analysis of the measured and predicted temperature gradient in the section of type I-beam with three different structures under natural conditions was carried out, and it was concluded that the flange of the V-section at the bottom of the section of type I-beam was the location where the maximum transverse temperature gradient occurred。

参考文献/References:

[1] 刘文丽, 贡金鑫, 张秀芳. 铺装层对T形梁桥梁竖向温度梯度的影响[J]. 公路交通科技, 2014, 31(10): 45-50
[2] 陈波, 郑瑾, 王建平. 桥梁结构温度效应研究进展[J]. 武汉理工大学学报, 2010, 32(24): 79-83
[3] 杨竟南, 何雄君, 杨蒋鹤立, 等. S形曲线钢箱梁斜拉桥沥青混凝土摊铺温度效应分析[J]. 桥梁建设, 2020, 50(2): 37-42
[4] 岳笛, 刘纲, 杨溥, 等. 重庆石板坡长江大桥复线桥温度效应分析[J]. 重庆建筑大学学报, 2007, 29(5): 119-122, 129
[5] 杨佐, 赵勇, 苏小卒. 国内外规范的混凝土桥梁截面竖向温度梯度模式比较[J]. 结构工程师, 2010, 26(1): 37-43
[6] 盛兴旺, 郑纬奇, 朱志辉, 等. 小半径曲线刚构箱梁桥日照时变温度场与温度效应[J]. 交通运输工程学报, 2019, 19(4): 24-34
[7] 项贻强, 龚世康, 朱汉华, 等. 考虑竖向和横向温度梯度的桥梁温度应力分析[J]. 中国市政工程, 2008(1): 29-31
[8] LEE J H. Experimental and analytical investigations of the thermal behavior of prestressed concrete bridge girders including imperfections[D]. Atlanta: Georgia Institute of Technology, 2010.
[9] 黄全成, 滕念管. 高速磁浮大型箱梁日照温度效应分析[J]. 铁道标准设计, 2020, 64(9): 75-81
[10] 王力, 牛思胜, 刘世忠, 等. 新型波形钢腹板组合箱梁桥温度效应研究[J]. 铁道科学与工程学报, 2020, 17(8): 2021-2029
[11] 刘江, 刘永健, 白永新, 等. 混凝土箱梁温度梯度模式的地域差异性及分区研究[J]. 中国公路学报, 2020, 33(3): 73-84
[12] 袁卓亚, 王旭, 朱伟庆, 等. 陕西地区桥梁结构温度作用特点[J]. 公路交通科技, 2019, 36(7): 73-80

相似文献/References:

[1]沈文增,庄兆意,李彬,等.卡式风盘送风角度对室内热舒适度的影响分析[J].应用科技,2020,47(6):90.[doi:10.11991/yykj.202005020]
 SHEN Wenzeng,ZHUANG Zhaoyi,LI Bin,et al.Analysis of the influence of the air supply angle of the Cassette fan coil on the indoor thermal comfort[J].Applied science and technology,2020,47(6):90.[doi:10.11991/yykj.202005020]

备注/Memo

备注/Memo:
收稿日期:2020-05-13。
基金项目:中铁建股份公司技术开发科技项目C类(2020-C20)
作者简介:赵立财,男,高级工程师,博士研究生
通讯作者:赵立财,E-mail:zhaolicai1314@foxmail.com
更新日期/Last Update: 2021-02-05