动静荷载作用下水泥混凝土路面接缝传荷能力的研究
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摘要
水泥混凝土路面为了减少温度开裂及干缩开裂,设置了接缝,而接缝却成了水泥混凝土路面最薄弱的部分。接缝的传荷能力对于水泥混凝土路面的路用性能和使用寿命,以及对于旧水泥凝土路面的罩面设计及其使用寿命具有较大的影响。因此接缝传荷能力的检测与评价对于水泥混凝土路面的养护、维修和罩面均具有重要意义。
本文详细介绍了有限元模型在静载及动载作用下的基本理论,确定了地基、混凝土板及接缝的有限元模型;对模型的单元类型及有限元网格划分做了详细介绍,根据FWD的工作原理确定了模型动态加载的参数设置,进而对模型进行动态荷载作用下的模型校验;并对接缝的传荷机理及现有接缝传荷能力的评价指标进行了介绍。
本文先对现有接缝传荷能力评价指标进行了对比分析,针对这几种评价指标的不足,提出一种适合的指标对接缝传荷能力进行评价。进而分别对模型施加静载和FWD半正弦荷载进行了动力响应分析,并采用新的评价指标对接缝传荷能力进行评价。确定动静作用下接缝模量、宽度、面板模量、基层模量及脱空尺寸对受荷板和未受荷板弯沉以及接缝传荷能力的影响。其次对受荷板弯沉、未受荷板弯沉及接缝传荷能力的动静作用下的关系进行分析,确定接缝模量、宽度、面板模量、基层模量及脱空尺寸对动静关系的影响。
Load Transfer Efficiency of the joints have a greater impact on the performance and service life of the Portland Cement Concrete pavement, as well as has a greater impact on the design and life of overlay of the old Portland Cement Concrete pavement. So the detection and evaluation of the Load Transfer Efficiency of the joints have a great Significance to the curing、maintenance and overlay of the Portland Cement Concrete pavement.
This paper describes the basic theory that the model of finite element under the static load and dynamic, and then established the model of the finite element of foundation、concrete slab and the joints; and it introduces the type of elements and the mesh detail. This paper determines the parameters of load according to the mechanism of testing of Falling Weight Deflectometer. This paper introduces the Mechanism and the evaluation index of the Load Transfer Efficiency of the joints,
It analyzes the shortage of existing evaluation index,and puts forward new the evaluation index that is used to the Load Transfer Efficiency of the joints. And then, the response of model to half-sine wave load of FWD is analyzed to deduce the variation rule, and the new the evaluation index is used to the Load Transfer Efficiency of the joints. Finally, we determined the relationship between the deflection of the loading apparatus、the unloading apparatus and the Load Transfer Efficiency of the joints with the modulus of joints、the width of joints、the modulus of panel、the modulus of base and the size of disengaging under the Dymamic and Static Loads. And then we determined the relationship between Dymamic with Static Loads of the loading apparatus、the unloading apparatus and the Load Transfer Efficiency of the joints,and determined the influence that is the modulus of joints、the width of joints、the modulus of panel、the modulus of base and the size of disengaging to the relationship between Dymamic with Static Loads。
本文详细介绍了有限元模型在静载及动载作用下的基本理论,确定了地基、混凝土板及接缝的有限元模型;对模型的单元类型及有限元网格划分做了详细介绍,根据FWD的工作原理确定了模型动态加载的参数设置,进而对模型进行动态荷载作用下的模型校验;并对接缝的传荷机理及现有接缝传荷能力的评价指标进行了介绍。
本文先对现有接缝传荷能力评价指标进行了对比分析,针对这几种评价指标的不足,提出一种适合的指标对接缝传荷能力进行评价。进而分别对模型施加静载和FWD半正弦荷载进行了动力响应分析,并采用新的评价指标对接缝传荷能力进行评价。确定动静作用下接缝模量、宽度、面板模量、基层模量及脱空尺寸对受荷板和未受荷板弯沉以及接缝传荷能力的影响。其次对受荷板弯沉、未受荷板弯沉及接缝传荷能力的动静作用下的关系进行分析,确定接缝模量、宽度、面板模量、基层模量及脱空尺寸对动静关系的影响。
Load Transfer Efficiency of the joints have a greater impact on the performance and service life of the Portland Cement Concrete pavement, as well as has a greater impact on the design and life of overlay of the old Portland Cement Concrete pavement. So the detection and evaluation of the Load Transfer Efficiency of the joints have a great Significance to the curing、maintenance and overlay of the Portland Cement Concrete pavement.
This paper describes the basic theory that the model of finite element under the static load and dynamic, and then established the model of the finite element of foundation、concrete slab and the joints; and it introduces the type of elements and the mesh detail. This paper determines the parameters of load according to the mechanism of testing of Falling Weight Deflectometer. This paper introduces the Mechanism and the evaluation index of the Load Transfer Efficiency of the joints,
It analyzes the shortage of existing evaluation index,and puts forward new the evaluation index that is used to the Load Transfer Efficiency of the joints. And then, the response of model to half-sine wave load of FWD is analyzed to deduce the variation rule, and the new the evaluation index is used to the Load Transfer Efficiency of the joints. Finally, we determined the relationship between the deflection of the loading apparatus、the unloading apparatus and the Load Transfer Efficiency of the joints with the modulus of joints、the width of joints、the modulus of panel、the modulus of base and the size of disengaging under the Dymamic and Static Loads. And then we determined the relationship between Dymamic with Static Loads of the loading apparatus、the unloading apparatus and the Load Transfer Efficiency of the joints,and determined the influence that is the modulus of joints、the width of joints、the modulus of panel、the modulus of base and the size of disengaging to the relationship between Dymamic with Static Loads。
引文
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[2]潘名伟,水泥混凝土路面脱空识别技术研究[D],郑州大学硕士学位论文,2007
[3]陈杰.公路路面动态特性分析方法[J],东北公路.2001. (4):51- 53.
[4] PCA, 1984.Thickness and Construction of Joints for Concrete Highway and Stress Pavement, Portland Cement Association.
[5] Dempsey, B.J., 1983. Laboratory and Field Studies of Channeling and Pumping in Pavement Systems, Paper presented at PLARC Seminar, Paris, France.
[6] Phu, N.C, J.P Christory and J.Ray, The Hydromechanics of Pumping in Concrete Pavements: Modeling and Prevention Pumping, Appendix I, Combatting Concrete Pavement Pumping: State-of-the-Art and Recommendations , PLARC, Technical Committee on Concrete Roads. 1986.
[7] HuangY.H.Pavement analysis of rigid pavements with pumping [D], PhD dissertation. Purdue University, West Lafayette, Ind.1993
[8] Cauwelaert, F.van. A rigorous analytical solution of a concrete slab submitted to interior and edges loads with no, partial and full shear transfer at the edge. Proceedings, 5th International Conference on Concrete Pavement Design and Rehabilitation.1993
[9] Huang, Y.H., and Wang, S.T., Finite Element Analysis of Concrete Slabs and its Implication for Rigid Pavement Design [J]. Highway Research Record 466,Highway Research Board, 1973, pp. 55~69
[10] Cheung, Y.K. and Zienkiewicz. O. C. Plates and tanks on elastic foundation an Application of finite element method, International Journal of Solids and Structures, Vo1, 1, 1965.
[11] Wang,S. K., Sargious, M. and Cheung, Y.K. Advanced analysis of rigid pavements. Transportation Engineering Journal, ASCE, 1974
[12] Huang, Y.H., Finite Element Analysis of Slabs on Elastic Solids [J].Transportation Engineering Journal,ASCE,1974,vol.100,No.TE2,pp.403~416
[13] Tabatabaie A M. Structural analysis of concrete pavement joints [D]. Illinois: University of Illinois at Urbana-Champaign, 1978
[14] Huang Y H.A computer package for structural analysis of concrete pavements[C].Third international conference on concrete pavement designrehabilitation. Indiana: Purdue University, 1985, 295~307
[15] Guo H, Sherwood J A, and Snyder M B. Component dowel-bar model for load transfer systems in PCC pavements [J]. Journal of Transportation Engineering, ASCE, 1995, 121(3):289~298
[16] Crovetti J A.Design and evaluation of jointed concrete pavement systems incorporating open-graded permeable bases[D]. Illinois: University of Illinois at Urbana-Champaign,1994
[17] Ioannides, A M, Alexander D R, Hammons M I, and Davis C M. Application of artificial neural networks to concrete pavement joint evaluation[C]. Washington, D.C.: Transportation Research Board, Transportation Research Record 1540, 1996, 54~64
[18] Michael I. Hammons. Advanced Pavement Design: Finite Element Modeling for Rigid Pavement Joints, Report II: Model Develop[R]. Washington, D.C.: U.S. Department of Transportation federal Aviation Administration, 1998
[19] Zollinger D G,Soares J. Performance of contionuously reinforced concrete pavemnets: Volume VII: Summary[R]. Virginia: Federal Highway Administration, 1999
[20] In-Soo Eom, I.D. Parsons, Keith Hjelmstad. Nonlinear Analysis of the Load Transfer Mechanism in Rigid Pavement Systems Considering Various Interface Conditions[R]. Department of Civil Engineering, University of Illinois at Urbana-Champaign.2000, 12
[21] Jiwon Kim, Keith Hjelmstad. Nonlinear Analysis of the Load Transfer Mechanism in Rigid Pavement Systems Considering Various Interface Conditions[R]. Department of Civil Engineering, University of Illinois at Urbana-Champaign. 2000, 12
[22] Jiwon Kim, Keith D. Hjelmstad. Three-Dimensional Finite Element Analysis of Doweled Joints for Airport Pavements [J].The 2003 Annual Meeting of Transportation Research Board, Washington D. C., 2003
[23] Shiva Srinivasan. Characterization of stresses induced in doweled joints due to thermal and and impact loads [D]. College of Engineering Mineral Resources at West Virginia University, Morgantown, West Virginia.2001
[24]张显安,水泥混凝土脱空状况分析与评定[D],长沙理工大学硕士学位论文,2005
[25]唐伯明.落锤式弯沉仪在路面结构状况评定中的应用[D],南京:东南大学,1996
[26] NCHRP, 1990. Calibrated Mechanistic Structural Analysis Procedures forpavement,University of Illinois at Urbana-Champaign
[27] Wu, s-s .Concrete Slabs Stabilized by Subsealing: A Performance eport. Transportation Research Record, Transportation Research BoardNo.1307 , 1991:12~20
[28]孙朝云.现在道路交通测试技术原理与应用[M].北京:人民交通出版社,2000
[29]姚祖康.水泥混凝土路面设计[M].合肥:安徽科技技术出版社,1997
[30]张宁,李雁.水泥混凝土路面脱空评定系统[J].华东公路,1997,22 (6),5~7
[31]卫东明.对水泥混凝土路面伸缩缝传力效率的探讨.中国市政工程2001,12,(4)13~16
[32]雷丽君.水泥混凝土路面板脱空评定及压浆技术研究[D].西安:长安大学硕士学位论文,2002
[33]查旭东.基于反算模量的接缝传荷能力的评价[J].中外公路,2002,4,(2)5~7
[34]单景松.旧水泥混凝土路面接缝处弯沉及影响因素[D] .长沙:长沙理工大学硕士学位论文,2004
[35]谢静静,考虑接缝传荷能力的刚性道面设计计算理论[D].西北工业大学硕士学位论文,2004,3
[36]肖兴强,水泥混凝土路面板底脱空和接缝传荷能力与脱空的关系[M],西南交大硕士学位论文,2004
[37]张显安.水泥混凝土路面板下脱空状况的分析与评定[D].长沙理工大学硕士学位论文,2005
[38]曾胜,陈明宪.水泥混凝土路面脱空与传荷作用机理研究[J].2005,2,(1),68~72
[39]陈飞,张宁,林亚萍,钱振东,黄卫.刚性路面传力杆接缝传荷能力评价新方法[J].交通运输工程学报,2006,12,(4):47~51
[40]刘丹.水泥混凝土路面接缝及结构优化研究[D].武汉理工大学硕士学位论文,2003
[41]刘众,王建国,瞿荣辉,谈至明.水泥混凝土路面接缝嵌缝料的应力分析[J].公路,2005(4)
[42] T. D. Gillespie, S. M. Karamihas, M. W. Sayers, et. al. Effects of Heavy-Vehicle characteristics on Pavement Response and Performance. TRB Report 353, National Academy Press, 1993
[43] A.Scarpas, R.AI-khoury, C.van Gurp, S.Erkens Finite Elements Simulation of Damage Development in Asphalt Concrete Pavements. Proceedings of 8th ICAP, Washington, 1997.
[44] WUddin, Z.Pan, PNoppakunwijai, et, al. Finite-Element Dynamic Analusis of Distressed Asphalt Pavements. Proceedings of 8th ICAP. Washington, 1997
[45]叶开沅,马国林.行动荷载作用下的连续梁的横向振动问题[J].应用数学和力学.1985,(4): 347~355
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