|
|
|
| Experimental Research on Shrinkage and Time Deformations of Main Bridge with(108+2×185+115)m Continual Rigid Frame |
| MA Ming |
| China Railway Siyuan Survey and Design Group Co．Ltd，Wuhan，Hubei 430063，China |
|
|
|
|
Abstract Research purposes: The construction of the intercity rapid rail transit from Guangzhou to Zhuhai(including Zhongshan to Jiangmen)is the first time for China to construct the intercity rapid rail transit in the true sense．In which the main bridge with(108+2×185+115)m continual rigid frame crossing RongGui canal is the longest span ballastless track bridge structure in China．Under natural environment，there are lots of factors to influence the bridge creep and the all factors influence each other，80 the influence mechanisms are very complicated．As the ballasfless track bridge structure has high request for the later shrinkage and time deformations，it is very important to explore the change laws of the shrinkage and time deformation．．
Research conclusions: From the experimental research it is concluded to properly increase the concrete aging at stretching prestress and the secondary permanent load time can decrease the later shrinkage deformation of the structure．When the temperature is fixed and humidity increases，the displacement of the upper arch in the middle of the span decreases，and when the humidity is fixed and temperation increases，the displacement of the upper arch in the middle of the span increases．
|
|
Received: 10 August 2010
|
|
|
|
|
|
[1] 肖佳广珠城际高性能预应力混凝土梁徐变性能研究 [R].中南大学土木建筑学院, 2010. Xiao Jia. Creep Research on High Performance Prestressed Concrete (HPPC ) Beam s of Newly Built Railroad Guangzhou to Zhuhai( including Zhongshan to Jiangmen) intercity fast track traffic engineering [R ]. School of CiVil engineering Central South University, 2010.
[2] 宁贵霞,孔德艳,谢志勇.铁路整体PC箱形梁的徐变效应分析[J].铁道工程学报, 2006(3): 25 -28.
N ing Guixia , Kong Deyan, Xie Zhiyong. Creep Effect Analysis of the Whole PC Box Girder for Railway Bridge[J ]. Journal of Railway Engineering Society, 2006(3): 25 -28.
[3] 何旭辉,朱立俊,余志武.城市轨道交通大跨度连续刚构 桥徐变时效分析与控制研究[J].城市轨道交通研究, 2009(4): 14 -18.
He Xuhui, Zhu Lijun, Yu Zhiwu . Creep Time Dependent Analysis and Control of Long Span Continuous Rigid Frame Bridge of Urban Rail Transit [J]. Urban Mass Transit, 2009(4): 14 -18.
[4] 周履,陈永春.收缩徐变[M ].中国铁道出版社, 1994.
Zhou Lv, Chen Yongchun. Shinkage and Creep [M ]. China Railway Publishing House, 1994.
[5] 惠荣炎,黄国兴,易冰若.混凝土的徐变[M ].中国铁道 出版社, 1988年.
Hui Rongyan, Huang Guoxing, Yi Bingruo. Creep Characteristics of Concrete [M ]. China Railway Publishing House, 1988.
[6] TB 1002. 3-2005,铁路桥涵钢筋混凝土和预应力混凝土 结构设计规范[S].
TB 1002. 3-2005, Code for Design on Reinforced and Prestressed Concrete Structure of Railway Bridge and Culvert[S].
[7] JTG D62-2004,公路钢筋混凝土和预应力混凝土桥涵设 计规范[S].
JTG D62-2004, Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridge and Culverts[S].
[8] JTJ 0. 23-1985,公路钢筋混凝土和预应力混凝土桥涵设 计规范[S].
JTJ 0. 23-1985, Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridge and Culverts[S].
[9] 邵旭东.桥梁工程[M ].北京:人民交通出版社, 2004.
Shao Xudong. Bridge Eengineer [M ]. Beijing: China Communications Press, 2004.
[10]胡狄,陈政清.预应力混凝土桥梁收缩与徐变变形试验 研究[J].土木工程学报, 2003(8): 79 -85.
Hu Di, Chen Zhengqing. Experimental Research On The Deformations For Shrinkage And Creep OF Beam s In Prestressed Concrte Bridges [ J ]. China Civil Engineering Journal, 2003(8): 79 -85.
|
|
|
|
2010, Vol. 27 
