[1]雷笑,叶见曙,王毅.日照作用下混凝土箱梁的温差代表值[J].东南大学学报(自然科学版),2008,38(6):1105-1109.[doi:10.3969/j.issn.1001-0505.2008.06.032]
　Lei Xiao,Ye Jianshu,Wang Yi.Representative value of solar thermal difference effect on PC box-girder[J].Journal of Southeast University (Natural Science Edition),2008,38(6):1105-1109.[doi:10.3969/j.issn.1001-0505.2008.06.032]
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日照作用下混凝土箱梁的温差代表值()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第6期
页码:
1105-1109
栏目:
交通运输工程
出版日期:
2008-11-20

文章信息/Info

Title:
Representative value of solar thermal difference effect on PC box-girder
作者:
雷笑1;  叶见曙1;  王毅2
1 东南大学交通学院, 南京 210096; 2 南京市公路管理处公路科学研究所, 南京 210012
Author(s):
Lei Xiao1;  Ye Jianshu1;  Wang Yi2
1 School of Transportation,Southeast University,Nanjing 210096, China
2 Nanjing Highway Scientific Research Institute, Nanjing Highway Administration Department,Nanjing 210012,China
关键词:
桥梁工程;  混凝土箱梁;  温度作用;  温差代表值;  统计分析;  概率模型
Keywords:
bridge engineering;  concrete box-girder;  temperature effect;  representative value of temperature difference;  statistic analysis;  probability model
分类号:
U448.35
DOI:
10.3969/j.issn.1001-0505.2008.06.032
摘要:
日照作用产生混凝土结构的应力和变形直接影响到混凝土结构的可靠性和耐久性.为了确定混凝土箱梁温差分布规律,对一座具有100 mm沥青铺装层的预应力混凝土梁桥箱梁进行了为期2年的温度效应的观测,在实测数据的基础上采用统计分析中假设检验和参数分析的方法对混凝土箱梁温度场的日照温差代表值进行了分析计算.计算结果表明:100 mm沥青铺装层的混凝土箱梁夏季最大日温差服从参数为W(8.358 7,3.591 2)的Weibull分布; 冬季最大日温差服从参数为W(3.958 0,2.720 7)的Weibull分布.依据长期观测数据提出了一种通过统计计算得到混凝土箱梁温差代表值的方法并计算出最大温差代表值.计算得到的最大温差标准值、频遇值和准永久值分别为17.3,17.0,15.9 ℃.
Abstract:
The structural stress and strains caused by solar temperature effect influence the reliability and durability of concrete structures directly.In order to determine the temperature distribution in the concrete box-girder,a two-year observation on thermal effect was conducted for a PC(prestressed concrete)continuous box-girder bridge with a 100 mm asphalt concrete cover.Based on the measurement data,the hypothesis testing and parameter analysis were used in the statistical analysis of values of daily temperature difference in the concrete box-girder.The calculation results indicate that the daily maximum temperature difference of the concrete box-girder with a 100mm asphalt concrete cover follows a Weibull distribution with parameters 8.358 7 and 3.591 2 in summer,and a Weibull distribution with parameters 3.958 0 and 2.720 7 in winter. A method to compute the representative value of temperature difference is proposed through statistical analysis base on long-term observation data.Representative values of temperature difference for the analyzed box-girder have been calculated by this method.Characteristic value,frequent value and quasi-permanent value are 17.3,17.0 and 15.9 ℃ respectively.

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备注/Memo

备注/Memo:
作者简介: 雷笑(1980—),男,博士生; 叶见曙(联系人),男,教授,博士生导师,yejianshu@seu.edu.cn.
基金项目: 国家西部交通建设科技资助项目(2003-318-223-15)、国家高技术研究发展计划(863计划)资助项目(2007AA11Z106).
引文格式: 雷笑,叶见曙,王毅.日照作用下混凝土箱梁的温差代表值[J].东南大学学报:自然科学版,2008,38(6):1105-1109.
更新日期/Last Update: 2008-11-20