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基于室内结构试验的半刚性基层开裂数值仿真

Keywords: 半刚性基层,结构试验,承载板,分层检测,超载,基层开裂,数值仿真

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Abstract:

为获得半刚性基层沥青路面结构的力学参数并分析其变化规律,设计并修建了大尺度半刚性基层沥青路面结构室内试槽,采用逐级加载方法进行结构内部应力、应变和模量的分层检测与试验.在试验数据的基础上,建立道路三维有限元模型,验证模型正确后进行了承载板数值仿真试验,分析了超载引起的半刚性基层开裂位置、起裂荷载、裂缝状态、应力强度因子和裂缝类型等问题.结果表明:当交通荷载超过起裂荷载时基层裂缝开始出现,沿路面横向基层层底靠近承载板中轴线位置的单元首先开裂,裂缝在行车荷载作用下进一步向上扩展而形成基层横向裂缝;半刚性基层荷载型开裂主要以I型张开型裂缝为主,应力强度因子大小取决于施加的荷载大小、裂缝长度和模型几何尺寸,应重点从合理设计基层厚度、改进基层材料性能和严格控制超载几个方面减少半刚性基层裂缝的产生.

References

[1]  邓学钧,黄晓明.路面设计原理与方法[M].2版.北京:人民交通出版社,2007:5-7.
[2]  沙庆林.高等级公路半刚性基层沥青路面[M].北京:人民交通出版社,1998:482-485.
[3]  黄仰贤.路面分析与设计[M].北京:人民交通出版社,1998:37-40.
[4]  郭大智,钟阳.刚性承载板下弹性多层连续体应力和位移分析[J].哈尔滨建筑大学学报,1995,28(2):17-22.GUO Da-zhi,ZHONG Yang.Analysis of stress anddisplacement in elastic multi-layer continuous system underrigid bearing plate[J].Journal of Harbin University ofCivil Engineering and Architecture,1995,28(2):17-22.(in Chinese)
[5]  石鸿.公路路基回弹模量承载板试验方法研究[J].公路,2008(9):118-122.SHI Hong.Resilient modulus of sub-grade bearing platetest method research[J].Highway,2008(9):118-122.(in Chinese)
[6]  胡德亮,于立勇,陈宗涛.三维有限元法在沥青路面力学计算中的应用[J].交通科技,2004(6):17-22.HU De-liang,YU Li-yong,CHEN Zong-tao.Theapplication of 3D finite element method in mechaniccalculation of asphalt pavement[J].Transportation Scienceand Technology,2004(6):17-22.(in Chinese)
[7]  周仲礼,尤广芬.三维有限元数值模拟的研究[J].哈尔滨商业大学学报:自然科学版,2009,25(6):737-740.ZHOU Zhong-li,YOU Guang-fen.Study on three-dimensional finite element numerical simulation[J].Journal of Harbin University of Commerce:NaturalSciences Edition,2009,25(6):737-740.(in Chinese)
[8]  DONG Ze-jiao,TAN Yi-qiu,CAO Li-ping.Combiningstrain measurement and FEM simulation to obtain dynamicresponse of asphalt pavement[J].International Journal ofPavement Research and Technology,2009,2(5):231-235.
[9]  AKBULUT H,ASLANTAS K.Finite element analysis ofstress distribution on bituminous pavement and failuremechanism[J].Materials and Design,2005,26(4):383-387.
[10]  KIM M,TUTUMLURER E,KWON J.Nonlinearpavement foundation modeling for three-dimensionalfinite-element analysis of flexible pavements[J].International Journal of Geomechanics,2009,9(5):195-208.
[11]  FANG Xiu-jun,JIN Feng.Extended finite elementmethod based on ABAQUS[J].Engineering Mechanics,2007,24(7):6-10.
[12]  NAKASUMI S,SUZUKI K,OHTSUBO H.Crack growthanalysis using mesh superposition technique and XFEM[J].International Journal for Numerical Methods inEngineering,2008,75(3):291-304.

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