|Table of Contents|

Analysis of Hydration Heat Effect Due to Post-casting Diaphragm in Segmental Precast Box-girder(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年01期
Page:
110-114
Research Field:
Publishing date:

Info

Title:
Analysis of Hydration Heat Effect Due to Post-casting Diaphragm in Segmental Precast Box-girder
Author(s):
CHEN Yang;  LIU Zhao
School of Civil Engineering, Southeast University, Nanjing 210096, Jiangsu, China
Keywords:
hydration heat effect;  temperature field;  stress field;  finite element;  prefabricated box-girder;  post-casting diaphragm
PACS:
U443.22
DOI:
-
Abstract:
Hydration heat effect induced by construction of post-casting diaphragm in segmental precast box-girder was studied combining with practical engineering. The model was founded with finite element software ANSYS. Based on the theory of three-dimensional transient temperature field, the hydration heat effect was simulated. The distribution and variation with time of the temperature field and the stress field of box-girder were analyzed. The law that the outer of web was under tension and the inner of web was under compression due to thermal stress caused by hydration heat, and the region of peak value of tensile stress were reveled, and the easy crack position was pointed out. The influences of laws and degrees of cement varieties, admixture proportions and casting temperatures on stress field were analyzed. The results show that the influence of cement variety on hydration heat effect is greatest, that of admixture proportion is the greater, and that of casting temperature is the smallest.

References:

[1] 楼庄鸿.大跨径梁式桥的主要病害[J].公路交通科技,2006,23(4):84-87. LOU Zhuang-hong.Main Faults in Large Span Beam Bridges[J].Journal of Highway and Transportation Research and Development,2006,23(4):84-87.
[2]臧 华,刘 钊,文武松,等.苏通大桥辅桥箱梁节段水化热效应的仿真分析[J].公路交通科技,2007,24(5):95-98. ZANG Hua,LIU Zhao,WEN Wu-song,et al.Simulation of Hydration Heat Effects on the Box Girder Segments of the Auxiliary Bridge for Sutong Bridge[J].Journal of Highway and Transportation Research and Development,2007,24(5):95-98.
[3]朱伯芳.大体积混凝土温度应力及温度控制[M].北京:中国电力出版社,1999. ZHU Bo-fang.Mass Concrete Temperature Stress and Temperature Control[M].Beijing:China Electric Power Press,1999.
[4]李 东,潘育耕.混凝土水化热瞬态温度场数值计算过程中的水化放热规律及水化速率问题[J].西安建筑科技大学学报:自然科学版,1999,31(3):277-279. LI Dong,PAN Yu-geng.Law and Velocity of Hydro-thermo Dissipation in the Calculation of Concrete Transient Temperature Field[J].Journal of Xi'an University of Architecture & Technology:Natural Science Edition,1999,31(3):277-279.
[5]施惠生,黄小亚.水泥混凝土水化热的研究与进展[J].水泥技术,2009(6):21-26. SHI Hui-sheng,HUANG Xiao-ya.Research Progress of Hydration Heat in Cement and Concrete[J].Cement Technology,2009(6):21-26.
[6]刘 钊,王景全.深圳湾公路大桥非通航孔桥墩顶横隔墙水化热不利效应及其对策研究[R].南京:东南大学,2006. LIU Zhao,WANG Jing-quan.Hydration Heat Effect and Countermeasures for the Diaphragm Wall of Pier-table Segment in Shenzhen Bay Non-navigable Bridge[R].Nanjing:Southeast University,2006.
[7]张学钢.大体积混凝土芯部温度监测及力学性能变化[J].筑路机械与施工机械化,2011,28(5):74-77. ZHANG Xue-gang.Temperature Monitoring and Mechanical Property Change of Core of Mass Concrete[J].Road Machinery & Construction Mechanization,2011,28(5):74-77.
[8]王成军.承台混凝土施工温度控制措施[J].筑路机械与施工机械化,2009,26(5):65-66,72. WANG Cheng-jun.Temperature Control Measure for Construction of Bearing Platform Concrete[J].Road Machinery & Construction Mechanization,2009,26(5):65-66,72.
[9]张 岗,贺拴海,宋一凡.混凝土箱梁水化热温度损伤修正耦合方法[J].交通运输工程学报,2008,8(1):54-60. ZHANG Gang,HE Shuan-hai,SONG Yi-fan.Updating Coupling Method of Hydration Heat Temperature Damage for Concrete Box Girder[J].Journal of Traffic and Transportation Engineering,2008,8(1):54-60.
[10]彭友松,强士中.公路混凝土箱梁三维温度应力计算方法[J].交通运输工程学报,2007,7(1):63-67. Peng You-song,Qiang Shi-zhong.3-D Thermal Stress Computation Method of Highway Concrete Box-girder[J].Journal of Traffic and Transportation En-gineering,2007,7(1):63-67.
[11]邵旭东,占雪芳,金晓勤,等.带地梁的新型半整体式无缝桥梁温度效应研究[J].中国公路学报,2010,23(1):43-48. SHAO Xu-dong,ZHAN Xue-fang,JIN Xiao-qin,et al.Temperature Effect of Innovative Semi-integral Abutment Jointless Bridge with Ground Beam[J].China Journal of Highway and Transport,2010,23(1):43-48.
[12]李潘武,曾宪哲,李博渊,等.浇筑温度对大体积混凝土温度应力的影响[J].长安大学学报:自然科学版,2011,31(5):68-71. LI Pan-wu,ZENG Xian-zhe,LI Bo-yuan,et al.Influence of Placement Temperature on Mass Concrete Temperature Stress[J].Journal of Chang'an University:Natural Science Edition,2011,31(5):68-71.

Memo

Memo:
-
Last Update: 2012-03-20