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工程力学  2014 

水泥混凝土路面板湿度梯度模拟与分析

, PP. 183-188

Keywords: 水泥混凝土路面,湿度梯度,外部干燥,板底吸水,自干燥,等效温度梯度

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Abstract:

水泥混凝土路面板在湿度梯度影响下会发生翘曲变形,若与荷载耦合会导致早期结构性断裂。由于缺乏对混凝土路面板内部湿度梯度分布进行量化分析的有效方法,在路面设计中往往不考虑湿度梯度的影响,从而忽略了引起板早期破坏的一个重要因素。该文基于板内湿度分布是外界环境影响和混凝土内部自干燥的耦合作用结果,考虑水灰比、环境湿度和混凝土内部水分传输性质等影响因素,提出了混凝土板内湿度梯度定量分析方法,对典型情况下板内湿度梯度进行模拟,并与实测湿度数据比较。采用等效温度梯度ΔTe定量比拟湿度梯度,以分析其对板翘曲变形和应力的影响。研究结果可以为设计、铺筑长寿命路面提供参考依据。

References

[1]  姚祖康. 水泥混凝土路面设计理论和方法[M]. 北京: 人民交通出版社, 2003: 193―195. Yao Zukang. Concrete pavement design theory and method [M]. Beijing: China Communication Press, 2003: 193―195.. (in Chinese)
[2]  Suprenant B A. Why slabs curl-part II: Factors affecting the amount of curling [J]. Concrete International, American Concrete Institute, 2002, 24(4): 59―64.
[3]  JTG D40-2011, 公路水泥混凝土路面设计规范[S]. 北京: 人民交通出版社, 2011.[3] JTG D40-2011, Specifications of cement concrete pavement design for highways [S]. Beijing: China communication Press, 2011. (in Chinese)
[4]  Bentz D P, Ehlen M A, Ferraris C F, Garboczi E J. Sorptivity based service life predictions for concrete pavements [C]. Orlando, Florida, USA: Proceedings of the 7th International Conference on Concrete Pavements, 2001: 181―193.
[5]  Wong S F, Wee T H, Swaddiwudhipong S. Study of water movement in concrete [J]. Magazine of Concrete Research, 2011, 53(3): 205―220.
[6]  Jensen O M. Thermodynamic limitation of self-desiccation [J]. Cement and Concrete Research, 1995, 25(1): 157―164.
[7]  Nilsson L O, Mjornell K A. Macro-model for self-desiccation in high performance concrete [R]. Gaithersburg, Maryland, USA: Report TVBM-3126, Proceedings of the Fourth International Research Seminar on Self-Desiccation and its Importance in Concrete Technology, 2005: 49―66.
[8]  陆金甫, 顾丽珍, 陈景良. 偏微分方程差分方法[M]. 北京: 高等教育出版社, 1988: 259―261.[14] Lu Jinfu, Gu Lizhen, Chen Jingliang. Difference method for partial differential equations [M]. Beijing: Higher Education Press, 1988: 259―261. (in Chinese)
[9]  Springenschmid R, Plannerer M. Experimental research on the test methods for surface cracking of concrete [M]. Technical University Munich, Germany: Institute for Building Materials, 2001.
[10]  Wei Ya, Hansen W. Characteristic of moisture transport and its effect on deformations in jointed plain concrete pavement [J]. Journal of the Transportation Research Board, 2011, 2240(1): 9―15.
[11]  魏亚. 水泥混凝土路面板湿度翘曲形成机理及变形计算[J]. 工程力学, 2012, 29(11): 266―271. Wei Ya. Mechanism of moisture warping and deformation calculations in concrete pavements [J]. Engineering Mechanics, 2012, 29(11): 266―271. (in Chinese)
[12]  Bazant Z P, Najjar L J. Nonlinear water diffusion in nonsaturated concrete [J]. Material and Structures, 1972, 5(25): 3―20.
[13]  Hall C. Water sorptivity of mortars and concretes: A review [J]. Magazine of Concrete Research, 1989, 41(147): 51―61.
[14]  Lockington D A, Parlange J Y. Anomalous water absorption in porous materials [J]. Journal of Physics D: Applied Physics, 2003, 36(3): 760―767.
[15]  Nielsen L F. Moisture sorption in porous materials [M]. Technical University of Denmark, 2007: 2―3.
[16]  ASTM 1585-04, Standard test method for measurement of rate of absorption of water by hydraulic-cement concretes [S]. West Conshohocken, PA: ASTM International, 2011.

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