寒冷地区高速铁路桥梁冻融损伤研究
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摘要
针对高速铁路桥梁中普遍使用的32m箱梁,以哈大高速铁路为工程依托,基于哈尔滨典型气象年逐时气象资料,综合考虑气温、太阳辐射、风速对桥梁温度场的影响,利用Ansys有限元软件研究寒冷地区高速铁路桥梁冻融损伤。结果表明:混凝土桥梁结构的形式及尺寸效应对其温度场的分布规律及冻融循环次数影响较大,同一结构的不同部位混凝土的冻融损伤程度存在较大差异;距离结构表面深度越深,温度变化越滞后,变化幅度越小,桥梁结构的冻融损伤程度随其深度的增加而呈指数规律递减;哈尔滨地区高速铁路桥梁顶板上表面混凝土和底板下表面混凝土的年等效冻融循环次数分别为4.157次和0.571次,前者的冻融情况远比后者严重;哈尔滨地区高速铁路桥梁混凝土抗冻等级建议值为≥F400。
The 32 mbox girders are commonly used in the high speed railway bridges.Based on the project of Harbin-Dalian high speed railway,according to the hourly meteorological data of Harbin in a typical meteorological year,and considering comprehensively the effects of air temperature,solar radiation and wind speed on bridge temperature field,the freezing-thawing damage of high speed railway bridge in cold region is studied by Ansys finite element software.Results show that the forms and sizes of concrete bridge structures have great influence on the distribution of the temperature field and the number of freezethaw cycles.There are great differences in the degrees of freeze-thaw damage of concrete in different parts of the same structure.The deeper the distance from the surface of the structure is,the smaller the temperature changes and the smaller the change range is.The degree of the freezing-thawing damage in bridge structure decreases exponentially with the increase of the depth.The annual equivalent freeze-thaw cycles of concrete on the top and under the bottom of the high speed railway bridge in Harbin are 4.157 and 0.571 respectively,and the damage degree of the top plate is far more serious than that of the bottom plate.The recommended freezing resistant grade of concrete for high speed railway bridges in Harbin is greater than or equal to F400.
The 32 mbox girders are commonly used in the high speed railway bridges.Based on the project of Harbin-Dalian high speed railway,according to the hourly meteorological data of Harbin in a typical meteorological year,and considering comprehensively the effects of air temperature,solar radiation and wind speed on bridge temperature field,the freezing-thawing damage of high speed railway bridge in cold region is studied by Ansys finite element software.Results show that the forms and sizes of concrete bridge structures have great influence on the distribution of the temperature field and the number of freezethaw cycles.There are great differences in the degrees of freeze-thaw damage of concrete in different parts of the same structure.The deeper the distance from the surface of the structure is,the smaller the temperature changes and the smaller the change range is.The degree of the freezing-thawing damage in bridge structure decreases exponentially with the increase of the depth.The annual equivalent freeze-thaw cycles of concrete on the top and under the bottom of the high speed railway bridge in Harbin are 4.157 and 0.571 respectively,and the damage degree of the top plate is far more serious than that of the bottom plate.The recommended freezing resistant grade of concrete for high speed railway bridges in Harbin is greater than or equal to F400.
引文
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[11]姜全德,蒋鸿.钢筋混凝土箱形梁桥日照温度场和温度应力平面有限元数值分析方法[J].桥梁建设,1990,(3):34-48.
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[14]中国气象局气象信息中心气象资料室,清华大学建筑技术科学系.中国建筑热环境分析专用气象数据集[M].北京:中国建筑工业出版社,2005.(Meteorological Information Center of China Meteorological Administration,Architecture Technology Department of Tsinghua University.Meteorological Data for the Analysis of Chinese Buildings’Thermal Environment[M].Beijing:China Architecture&Building Press,2005.in Chinese)
[15]FROLI M,HARIGA N,NATI G,et al.Longitudinal Thermal Behavior of a Composite Box Girder Bridge[J].Structural Engineering International,1996,6(4):237-242.
[16]中华人民共和国住房和城乡建设部.GB/T 50082-2009普通混凝土长期性能和耐久性能试验方法标准[S].北京:中国建筑工业出版社,2009.(Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB/T 50082-2009Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete[S].Beijing:China Architecture&Building Press,2009.in Chinese)
[17]刘西拉,唐光普.现场环境下混凝土冻融耐久性预测方法研究[J].岩石力学与工程学报,2007,26(12):2412-2418.(LIU Xila,TANG Guangpu.Research on Prediction Method of Concrete Freeze-Thaw Durability under Field Environments[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2412-2418.in Chinese)
[18]蔡昊.混凝土抗冻耐久性预测模型[D].北京:清华大学,1998.(CAI Hao.Prediction Model of Concrete Freeze-Thaw Durability[D].Beijing:Tsinghua University,1998.in Chinese)
[2]许玉琢,李学芳,张澎丽.冻融循环作用对混凝土桥梁寿命的影响[J].河北工业大学学报.2009,38(4):107-110.(XU Yuzhuo,LI Xuefang,ZHANG Pengli.Impact of Freeze-Thaw on the Concrete Bridge Life[J].Journal of Hebei University of Technology,2009,38(4):107-110.in Chinese)
[3]严莉华.高寒冻土地区桥梁病害机理及处理方法研究[D].西安:长安大学,2010.(YAN Lihua.Mechanism and Processing Method of the Bridge Disease in Alpine Permafrost Areas[D].Xi’an:Chang’an University,2010.in Chinese)
[4]刘玉萍.海冰影响冻融损伤的桥梁结构安全的机理及应用研究[D].济南:山东大学,2012.(LIU Yuping.The Research on Safety Mechanics of Bridge Structure Impacted by Sea Ice and Its Application under Condition of Frost and Thaw[D].Jinan:Shandong University,2012.in Chinese)
[5]李龙.除冰盐冻融环境下桥梁耐久性评价研究[D].长春:吉林大学,2014.(LI Long.Research on Bridge Durability Evaluation under Environment of Deicing Salt and Freeze-Thaw Cycle[D].Changchun:Jilin University,2014.in Chinese)
[6]沈凯棋.考虑高铁简支梁桥下部结构冻融病害及横向变位影响的车桥系统动力响应分析.[D].北京:北京交通大学,2017.(SHEN Kaiqi.Dynamic Response Analysis of Train-Bridge Interaction System Considering Freeze-Thaw Disease and Lateral Deflection of High-Speed Railway Simply Supported Beam Bridge Substructure[D].Beijing:Beijing Jiaotong University,2017.in Chinese)
[7]李金玉.冻融环境下混凝土结构的耐久性设计与施工[G]//中国土木工程学会.混凝土结构耐久性设计与施工指南.北京:中国建筑工业出版社,2014:120-129.
[8]武海荣,金伟良,延永东,等.混凝土冻融环境区划与抗冻性寿命预测[J].浙江大学学报:工学版,2012,46(4):650-656.(WU Hairong,JIN Weiliang,YAN Yongdong,et al.Environmental Zonation and Life Prediction of Concrete in Frost Environments[J].Journal of Zhejiang University:Engineering Science,2012,46(4):650-656.in Chinese)
[9]任红梅.高性能混凝土剪力墙火灾反应理论分析与抗火设计[D].上海:同济大学,2006.(REN Hongmei.Fire Response and Fire Resistance Design of HPC Shear Walls[D].Shanghai:Tongji University,2006.in Chinese)
[10]宋志文.高性能混凝土箱梁日照温度场与温度效应研究[D].上海:同济大学,2010.(SONG Zhiwen.On Temperature Field and Thermal Effects in High Performance Concrete Box Girder under Solar Radiation[D].Shanghai:Tongji University,2010.in Chinese)
[11]姜全德,蒋鸿.钢筋混凝土箱形梁桥日照温度场和温度应力平面有限元数值分析方法[J].桥梁建设,1990,(3):34-48.
[12]刘华波.异形截面预应力混凝土箱梁温度场及温度效应研究[D].上海:同济大学,2002.(LIU Huabo.Research of Temperature Distribution and Thermal Effects of Prestressed Concrete Box Girder with Irregular Cross Section[D].Shanghai:Tongji University,2002.in Chinese)
[13]吴翰昌.半刚性路面温度应力分析[M].北京:科学出版社,1995.(WU Hanchang.Temperature Stress Analysis of Semi-Rigid Pavement[M].Beijing:Science Press,1995.in Chinese)
[14]中国气象局气象信息中心气象资料室,清华大学建筑技术科学系.中国建筑热环境分析专用气象数据集[M].北京:中国建筑工业出版社,2005.(Meteorological Information Center of China Meteorological Administration,Architecture Technology Department of Tsinghua University.Meteorological Data for the Analysis of Chinese Buildings’Thermal Environment[M].Beijing:China Architecture&Building Press,2005.in Chinese)
[15]FROLI M,HARIGA N,NATI G,et al.Longitudinal Thermal Behavior of a Composite Box Girder Bridge[J].Structural Engineering International,1996,6(4):237-242.
[16]中华人民共和国住房和城乡建设部.GB/T 50082-2009普通混凝土长期性能和耐久性能试验方法标准[S].北京:中国建筑工业出版社,2009.(Ministry of Housing and Urban-Rural Development of the People’s Republic of China.GB/T 50082-2009Standard for Test Methods of Long-Term Performance and Durability of Ordinary Concrete[S].Beijing:China Architecture&Building Press,2009.in Chinese)
[17]刘西拉,唐光普.现场环境下混凝土冻融耐久性预测方法研究[J].岩石力学与工程学报,2007,26(12):2412-2418.(LIU Xila,TANG Guangpu.Research on Prediction Method of Concrete Freeze-Thaw Durability under Field Environments[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2412-2418.in Chinese)
[18]蔡昊.混凝土抗冻耐久性预测模型[D].北京:清华大学,1998.(CAI Hao.Prediction Model of Concrete Freeze-Thaw Durability[D].Beijing:Tsinghua University,1998.in Chinese)