钢桥面沥青混合料铺装应变动态响应实测研究
|
摘要
掌握钢桥面沥青混合料铺装层在车载作用下的真实力学特性对桥面铺装体系设计有重要意义,而现阶段现场桥面铺装层的力学实测数据仍偏少,尤其缺乏对铺装层不同温度下服役时力学特性的长期监测。为此,该研究对钢桥面双层SMA混合料铺装进行现场实桥加载试验,实测铺装层在低温、中温、高温3种服役温度下的应变响应数据。试验结果表明,钢桥梯形肋正上方铺装层混合料在中低温服役状态下主要承受压应变的作用,而在高温服役时则主要承受拉应变的作用;动载作用过程中铺装层底纵向应变会出现拉压应变交替作用的现象,而横向应变只体现为拉应变或压应变的形式;加载车行驶速度对混合料的应变极值均有明显的影响,加载车低速行驶时混合料层底横向及纵向变形最为显著。同时,研究利用加载试验中铺装层应变响应时程曲线,计算不同加载状态下混合料对应的加载频率数值,计算结果可为钢桥面铺装混合料室内试验中加载频率参数的确定提供参考。
The mechanical response of steel deck asphalt pavement under load provides essential reference for the improvement of pavement design methods. However, there is extremely limited research focusing on the field mechanical measurements of steel deck pavement. To be more specific, the mechanical properties of steel deck pavement under different loading temperatures are still unknown. A field test was conducted to investigate the dynamic strain responses of a kind of double-layer SMA pavement at different temperatures and loading speeds.Test results show that the mixture of the pavement is mainly subjected to compressive strain under medium and relatively low loading temperature. However, the mixture is mainly subjected to tensile strain at high loading temperature. The longitudinal strain at the bottom of the pavement alternates in compression-tension cycles while the transverse one is constantly compressive strain. The speed of loading truck has a significant influence on the strain values of the mixture. The deformation of the mixture at low loading speed is significantly larger than that at high speed. Moreover, the equivalent loading frequency of the mixture under different loading conditions is calculated based on the strain response pulse of the pavement. The research results can provide reference for determining the proper loading frequency values of some specific laboratory tests.
The mechanical response of steel deck asphalt pavement under load provides essential reference for the improvement of pavement design methods. However, there is extremely limited research focusing on the field mechanical measurements of steel deck pavement. To be more specific, the mechanical properties of steel deck pavement under different loading temperatures are still unknown. A field test was conducted to investigate the dynamic strain responses of a kind of double-layer SMA pavement at different temperatures and loading speeds.Test results show that the mixture of the pavement is mainly subjected to compressive strain under medium and relatively low loading temperature. However, the mixture is mainly subjected to tensile strain at high loading temperature. The longitudinal strain at the bottom of the pavement alternates in compression-tension cycles while the transverse one is constantly compressive strain. The speed of loading truck has a significant influence on the strain values of the mixture. The deformation of the mixture at low loading speed is significantly larger than that at high speed. Moreover, the equivalent loading frequency of the mixture under different loading conditions is calculated based on the strain response pulse of the pavement. The research results can provide reference for determining the proper loading frequency values of some specific laboratory tests.
引文
[1]Wolchuk R.Steel orthotropic decks:developments in the1990s[J].Transportation Research Record:Journal of the Transportation Research Board,1999,1688:30-37
[2]Cullimore M S,Horsington R W.The extension of a fatigue crack in a model steel deck plate under cyclic loading[C]//Development in Bridge Design and Constructioin.Cardiff:University College Cardiff,1971
[3]黄卫.大跨径桥梁钢桥面铺装设计[J].土木工程学报,2007,40(9):65-77(Huang Wei.Design of deck pavement for long-span steel bridges[J].China Civil Engineering Journal,2007,40(9):65-77(in Chinese))
[4]钱振东,黄卫,骆俊伟,等.正交异性钢桥面铺装层的力学特性分析[J].交通运输工程学报,2002,2(3):47-51(Qian Zhendong,Huang Wei,Luo Junwei,et al.Mechanical analysis of pavement of orthotropic steel deck[J].Journal of Traffic and Transportation Engineering,2002,2(3):47-51(in Chinese))
[5]Seim C,Ingham T.Influence of wearing surfacing on performance of orthotropic steel plate decks[J].Transportation Research Record:Journal of the Transportation Research Board,2004,1892(1):98-106
[6]吴一鸣.大跨径钢桥桥面铺装力学深入研究[D].南京:东南大学,2005(Wu Yiming.Mechanics analysis about asphalt paving on long-span steel bridge[D].Nanjing:Southeast University,2005(in Chinese))
[7]Li J,Liu X,Scarpas A,et al.Finite element of multilayer surfacing systems on orthotropic steel bridges[C]//Airfield and Highway Pavement.Reston,VA:ASCE,2013
[8]王应良,李小珍,强士中.梯形加劲肋正交异性板钢桥面分析的等效格子梁法[J].西南交通大学学报,1999,34(5):545-549(Wang Yingliang,Li Xiaozhen,Qiang Shizhong.Equivalent grid beam method for the analysis of orthotropic steel plate bridge deck with trapezoidal longititudal ribs[J].Journal of Southwest Jiaotong University,1999(5):545-549(in Chinese))
[9]邵腊庚,张起森,李宇峙,等.直道钢桥面沥青铺装层动应变测试与分析[J].公路,2001(1):63-66(Shao Lageng,Zhang Qisen,Li Yuzhi,et al.Dynamic strain test and analysis of steel deck asphalt pavement layer on straight track test model[J].Highway,2001(1):63-66(in Chinese))
[10]李闯民,李宇峙.钢桥桥面沥青铺装层应变变化规律研究[J].公路交通科技,2000,17(6):1-4(Li Chuangmin,Li Yuzhi.Study on variation of strain in the surfacing of asphalt mixture on the steel bridge deck[J].Journal of Highway and Transportation Research and Development,2000,17(6):1-4(in Chinese))
[11]Medani T O.Design principles of surfacings on orthotropic steel bridge decks[D].Delft:Delft University of Technology,2006
[12]杨三强.钢桥面铺装加速加载实验研究[D].西安:长安大学,2010(Yang Sanqiang.The accelerated testing study on the steel bridge deck pavement[D].Xi’an:Chang’an University,2010(in Chinese))
[13]张德佳,叶奋,袁金凤,等.基于实桥加载的钢桥面铺装数值模型优化[J].公路交通科技,2013,30(7):103-106,125(Zhang Dejia,Ye Fen,Yuan Jinfeng,et al.Optimization of numerical model of steel deck pavement based on practical bridge loading[J].Journal of Highway and Transportation Research and Development,2013,30(7):103-106,125(in Chinese))
[14]武金婷,叶奋,吴怀睿,等.实桥加载下钢桥面沥青铺装层应变动态响应[J].同济大学学报:自然科学版,2014,42(3):413-420(Wu Jinting,Ye Fen,Wu Huairui,et al.Strain dynamic response of asphalt pavement on steel deck bridge with field loading test[J].Journal of Tongji University:Natural Science,2014,42(3):413-420(in Chinese))
[15]Medani T O,Liu X,Huurman M,et al.Characterisation of surfacing materials for orthotropic steel deck bridges.Part 1:experimental work[J].International Journal of Pavement Engineering,2010,11(3):237-253
[16]Brown S F,Darter M,Larson G,et al.Independent review of the“mechanistic-empirical pavement design guide”and software[R].Washington:Transportation Research Board of the National Academies,2006
[17]Garcia G,Thompson M R.Strain and pulse duration considerations for extended-life hot-mix asphalt pavement design[J].Transportation Research Record:Journal of the Transportation Research Board,2009(2087):3-11
[18]Kim T W,Baek J,Lee H J,et al.Effect of pavement design parameters on the behaviour of orthotropic steel bridge deck pavements under traffic loading[J].International Journal of Pavement Engineering,2014,15(5):471-482
[19]孙立军.铺面工程学[M].上海:同济大学出版社,2012
[20]Fakhri M,Ghanizadeh A R.Modelling of 3D response pulse at the bottom of asphalt layer using a novel function and artificial neural network[J].International Journal of Pavement Engineering,2014,15(8):671-688
[21]Losa M,Natale A D.Evaluation of representative loading frequency for linear elastic analysis of asphalt pavements[J].Transportation Research Record:Journal of the Transportation Research Board,2012(2305):150-161
[22]Hornyak N,Crovetti J A.Analysis of load pulse durations for marquette interchange instrumentation project[J].Transportation Research Record:Journal of the Transportation Research Board,2009(2094):53-61
[23]Alireza B,Mark K.Field evaluation and analysis of flexible pavement structural responses under dynamic loads[J].Road Materials&Pavement Design,2012,13(1):26-37
[2]Cullimore M S,Horsington R W.The extension of a fatigue crack in a model steel deck plate under cyclic loading[C]//Development in Bridge Design and Constructioin.Cardiff:University College Cardiff,1971
[3]黄卫.大跨径桥梁钢桥面铺装设计[J].土木工程学报,2007,40(9):65-77(Huang Wei.Design of deck pavement for long-span steel bridges[J].China Civil Engineering Journal,2007,40(9):65-77(in Chinese))
[4]钱振东,黄卫,骆俊伟,等.正交异性钢桥面铺装层的力学特性分析[J].交通运输工程学报,2002,2(3):47-51(Qian Zhendong,Huang Wei,Luo Junwei,et al.Mechanical analysis of pavement of orthotropic steel deck[J].Journal of Traffic and Transportation Engineering,2002,2(3):47-51(in Chinese))
[5]Seim C,Ingham T.Influence of wearing surfacing on performance of orthotropic steel plate decks[J].Transportation Research Record:Journal of the Transportation Research Board,2004,1892(1):98-106
[6]吴一鸣.大跨径钢桥桥面铺装力学深入研究[D].南京:东南大学,2005(Wu Yiming.Mechanics analysis about asphalt paving on long-span steel bridge[D].Nanjing:Southeast University,2005(in Chinese))
[7]Li J,Liu X,Scarpas A,et al.Finite element of multilayer surfacing systems on orthotropic steel bridges[C]//Airfield and Highway Pavement.Reston,VA:ASCE,2013
[8]王应良,李小珍,强士中.梯形加劲肋正交异性板钢桥面分析的等效格子梁法[J].西南交通大学学报,1999,34(5):545-549(Wang Yingliang,Li Xiaozhen,Qiang Shizhong.Equivalent grid beam method for the analysis of orthotropic steel plate bridge deck with trapezoidal longititudal ribs[J].Journal of Southwest Jiaotong University,1999(5):545-549(in Chinese))
[9]邵腊庚,张起森,李宇峙,等.直道钢桥面沥青铺装层动应变测试与分析[J].公路,2001(1):63-66(Shao Lageng,Zhang Qisen,Li Yuzhi,et al.Dynamic strain test and analysis of steel deck asphalt pavement layer on straight track test model[J].Highway,2001(1):63-66(in Chinese))
[10]李闯民,李宇峙.钢桥桥面沥青铺装层应变变化规律研究[J].公路交通科技,2000,17(6):1-4(Li Chuangmin,Li Yuzhi.Study on variation of strain in the surfacing of asphalt mixture on the steel bridge deck[J].Journal of Highway and Transportation Research and Development,2000,17(6):1-4(in Chinese))
[11]Medani T O.Design principles of surfacings on orthotropic steel bridge decks[D].Delft:Delft University of Technology,2006
[12]杨三强.钢桥面铺装加速加载实验研究[D].西安:长安大学,2010(Yang Sanqiang.The accelerated testing study on the steel bridge deck pavement[D].Xi’an:Chang’an University,2010(in Chinese))
[13]张德佳,叶奋,袁金凤,等.基于实桥加载的钢桥面铺装数值模型优化[J].公路交通科技,2013,30(7):103-106,125(Zhang Dejia,Ye Fen,Yuan Jinfeng,et al.Optimization of numerical model of steel deck pavement based on practical bridge loading[J].Journal of Highway and Transportation Research and Development,2013,30(7):103-106,125(in Chinese))
[14]武金婷,叶奋,吴怀睿,等.实桥加载下钢桥面沥青铺装层应变动态响应[J].同济大学学报:自然科学版,2014,42(3):413-420(Wu Jinting,Ye Fen,Wu Huairui,et al.Strain dynamic response of asphalt pavement on steel deck bridge with field loading test[J].Journal of Tongji University:Natural Science,2014,42(3):413-420(in Chinese))
[15]Medani T O,Liu X,Huurman M,et al.Characterisation of surfacing materials for orthotropic steel deck bridges.Part 1:experimental work[J].International Journal of Pavement Engineering,2010,11(3):237-253
[16]Brown S F,Darter M,Larson G,et al.Independent review of the“mechanistic-empirical pavement design guide”and software[R].Washington:Transportation Research Board of the National Academies,2006
[17]Garcia G,Thompson M R.Strain and pulse duration considerations for extended-life hot-mix asphalt pavement design[J].Transportation Research Record:Journal of the Transportation Research Board,2009(2087):3-11
[18]Kim T W,Baek J,Lee H J,et al.Effect of pavement design parameters on the behaviour of orthotropic steel bridge deck pavements under traffic loading[J].International Journal of Pavement Engineering,2014,15(5):471-482
[19]孙立军.铺面工程学[M].上海:同济大学出版社,2012
[20]Fakhri M,Ghanizadeh A R.Modelling of 3D response pulse at the bottom of asphalt layer using a novel function and artificial neural network[J].International Journal of Pavement Engineering,2014,15(8):671-688
[21]Losa M,Natale A D.Evaluation of representative loading frequency for linear elastic analysis of asphalt pavements[J].Transportation Research Record:Journal of the Transportation Research Board,2012(2305):150-161
[22]Hornyak N,Crovetti J A.Analysis of load pulse durations for marquette interchange instrumentation project[J].Transportation Research Record:Journal of the Transportation Research Board,2009(2094):53-61
[23]Alireza B,Mark K.Field evaluation and analysis of flexible pavement structural responses under dynamic loads[J].Road Materials&Pavement Design,2012,13(1):26-37