基于内聚力模型的水稳碎石基层微裂技术数值模拟
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摘要
为验证微裂技术能够有效地减小水泥稳定碎石早期收缩应力,对微裂后的水泥稳定碎石基层进行数值模拟。通过使用有限元软件并基于内聚力模型,对微裂后的水泥稳定碎石基层在外界环境变化时进行数值模拟分析,模拟了不同间距和不同深度裂缝布置下最大主应力的分布情况以及系统能量的变化规律,结果表明水泥稳定碎石基层的最大主应力和系统总能量随微裂缝间距的减小和深度的增加均呈减小趋势。并通过微裂技术在实际工程中的应用证明了微裂技术在减少水稳碎石基层收缩裂缝和减轻沥青路面反射裂缝中具有一定创新性和工程适用性。
A numerical simulation of the cement stabilized macadam base after micro-cracking was held to verify that the micro-cracking technology could efficiently reduce the early shrinkage stress of the cement stabilized macadam. By using finite element software and based on the cohesive zone model,it was able to numerically simulate and analyze the cement stabilized macadam base after micro-cracking when the external environment changed. In that process,the distribution of maximum principal stress and the change regularity of systematic energy were simulated under different cracks' depth and different space arrangement,the results proved that the maximum principal stress and the systematic energy showed a decrease trend with the decrease of cracks' spacing and the increase of depth.And through the application of the micro-cracking technology in practical engineering,it was proved that the microcracking technology had certain innovation and engineering applicability to reduce the shrinkage crack of the cement stabilized macadam base and the reflection crack of the bituminous pavement.
A numerical simulation of the cement stabilized macadam base after micro-cracking was held to verify that the micro-cracking technology could efficiently reduce the early shrinkage stress of the cement stabilized macadam. By using finite element software and based on the cohesive zone model,it was able to numerically simulate and analyze the cement stabilized macadam base after micro-cracking when the external environment changed. In that process,the distribution of maximum principal stress and the change regularity of systematic energy were simulated under different cracks' depth and different space arrangement,the results proved that the maximum principal stress and the systematic energy showed a decrease trend with the decrease of cracks' spacing and the increase of depth.And through the application of the micro-cracking technology in practical engineering,it was proved that the microcracking technology had certain innovation and engineering applicability to reduce the shrinkage crack of the cement stabilized macadam base and the reflection crack of the bituminous pavement.
引文
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2姜慧辉.国外防止半刚性基层反射裂缝微裂技术分析.交通科技,2010;(增刊2):85-88Jiang Huihui.Analysis of the micro crack technique of semi rigid base reflection cracking in foreign countries.Traffic Science and Technology,2010;(S2):85-88
3杨涛.半刚性基层沥青路面反射裂缝的产生机理及其防治措施.武汉:武汉理工大学,2005Yang Tao.The formation mechanism and prevention measures of reflection crack of semi rigid base asphalt pavement.Wuhan:Wuhan University of Technology,2005
4刘敬辉.基于内聚力模型的预裂缝技术机理分析.公路交通科技,2012;29(7):32-37Liu Jinghui.Mechanism analysis of pre-fracture technology based on cohesive zone model.Journal of Highway and Transportation Research and Development,2012;29(7):32-37
5张静,马士宾,魏连雨,等.基于微观力学模型的沥青混合料水损坏研究.中外公路,2015;35(6):254-259Zhang Jing,Ma Shibin,Wei Lianyu,et al.Study on water damage of asphalt mixture based on micro mechanics model.Journal of China and Foreign Highway,2015;35(6):254-259
6黄刘刚.内聚力模型的分析及有限元子程序开发.郑州:郑州大学,2010Huang Liugang.Analysis of cohesive force model and development of finite element subroutine.Zhengzhou:Zhengzhou University,2010
7赵永利,张东.基于内聚力模型的沥青路面低温缩裂研究.公路交通科技,2010;27(1):11-16Zhao Yongli,Zhang Dong.Study on low temperature shrinkage cracking of asphalt pavement based on cohesive zone model.Journal of Highway and Transportation Research and Development,2010;27(1):11-16
8韩子东.道路结构温度场研究.长安:长安大学,2001Han Zidong.Research on temperature field of road structure.Chang'an:Chang'an University,2001
9钮凯健,李昶.基于内聚力模型的沥青路面低温缩裂数值模拟.公路交通科技,2012;29(6):11-15,21Niu Kaijian,Li Chang.Numerical simulation of low temperature cracking of asphalt pavement based on cohesive zone model.Journal of Highway and Transportation Research and Development,2012;29(6):11-15,21
10 Shet C,Chandra N.Analysis of energy balance when using cohesive zone models to simulate fracture processes ASME.Journal of Engineering Materials and Technology,2002;124(4):440-450
11孙丽娟.考虑层间接触的半刚性基层沥青路面热应力耦合分析.杭州:浙江大学,2013Sun Lijuan.Thermal stress coupling analysis of semi-rigid base asphalt pavement considering contact between layers.Hangzhou:Zhejiang University,2013
12杨轶.沥青路面温度场与温度应力的量测与理论分析.大连:大连理工大学,2013Yang Yi.Measurment and theoretical analysis of temperature field and temperature stress of asphalt pavement.Dalian:Dalian University of Technology,2013
13 Zhang P,Li Q F,Liu C H.Prediction of shrinkage cracking and corresponding cracking prevention measure of the semi-rigid base layer.International Journal of Pavement Engineering,2009;10(5):383-388
14卓鹏飞,安丽媛,孙伟伟,等.基于损伤能量释放率的混凝土损伤断裂耦合效应分析.防灾减灾工程学报,2013;33(2):225-230Zhuo Pengfei,An Liyuan,Sun Weiwei,et al.Coupling effect analysis of damage and fracture of concrete based on damage energy release rate.Journal of Disaster Prevention and Mitigation Engineering,2013;33(2):225-230