资源描述：
《水泥沥青砂浆的静动态力学行为》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、第6卷第3期铁道科学与工程学报Vol16No132009年6月JOURNALOFRAILWAYSCIENCEANDENGINEERINGJune2009水泥沥青砂浆的静动态力学行为31,21,21,21,2刘永亮,孔祥明,邹炎,阎培渝(1.清华大学土木工程系,北京100084;2.结构工程与振动教育部重点实验室,北京100084)摘要:研究了3种典型水泥沥青胶凝材料的动态力学行为和不同A/C的水泥沥青砂浆的静动态力学行为。采用动态黏弹谱仪测试水泥沥青胶凝材料的动态模量和滞后角随加载频率的变化关系。采用电液伺
2、服控制材料万能试验机研究了水泥沥青砂浆静态抗压、动态周期性压力荷载下的力学行为。结果表明:对同一水泥沥青胶凝材料,动态模量随频率的增大而增大;对不同水泥沥青胶凝材料,随着A/C的增大,动态模量减少而滞后角增大,表明其黏弹性越发显著;水泥沥青砂浆的抗压强度、弹性模量以及破坏能随A/C的增大而减少,且变化规律基本相似;水泥沥青砂浆的动态模量随A/C以及加载频率的变化规律与其胶凝材料的规律基本一致。基于标准固体模型,通过对水泥沥青砂浆的动态模量拟合得到其力学模型中各基本元件的力学参数,从而实现了对水泥沥青砂浆力学
3、行为的完全本构表征。关键词:水泥沥青砂浆;水泥沥青胶凝材料;黏弹性;动态模量;滞后角+中图分类号:U214.99文献标识码:A文章编号:1672-7029(2009)03-0001-07Staticanddynamicmechanicalbehaviorofcementasphaltmortars1,21,21,21,2LIUYong2liang,KONGXiang2ming,ZOUYan,YANPei2yu(1.DepartmentofCivilEngineering,TsinghuaUniversity
4、,Beijing100084,China;2.KeyLaboratoryofStructuralEngineeringandVibrationofChinaEducationMinistry,TsinghuaUniversity,Beijing100084,China)Abstract:Staticanddynamicmechanicalbehaviorsofcementasphaltbinders(CABs)andcementasphaltmor2tars(CAMs)withdifferentA/Cwer
5、estudied.DynamicmodulusandlaganglesofCABsweremeasuredbyDy2namicMechanicalAnalysis(DMA)apparatus.MechanicalpropertiesofCAMsweretestedbytheMTS(Materialtestingsystem)underbothstaticanddynamicloads.Theresultsindicatedthatthedynamicmodulusofthece2mentasphaltbin
6、derincreaselwiththeloadingfrequency.ForCABswithdifferentA/C,lagangleincreasedwiththeincreasingofA/C,implyingthemoreremarkablevisco-elasticityfeaturewhenmoreasphaltisincorporatedintoCAB.Thecompressivestrength,theelasticmodulusandthedamageenergyofCAMsdecreas
7、ewiththein2creasingofA/C.ThedynamicmodulusofCAMsshowthesametrendasthatofCABswiththechangeofA/Corloadingfrequency.StandardsolidmodelisappliedtodescribethemechanicalbehaviorofCAMsandallmechani2calparametersarecalculatedbyfittingthedynamicmodulusofCAMsintothe
8、model.Thereforethemechanicalbehaviorisfullysimulatedandthesimulatedfeaturesareinlinewiththosefromexperimentaltesting.Keywords:cementasphaltmortar;cementasphaltbinder;visco-elasticity;dynamicmodulus;lagangle水泥
