基于足尺加速加载试验的地震波模量变化规律  

Study on the variation of seismic modulus under full-scale accelerated pavement test

作　　者：袁昱[1] 刘黎萍[1] 王明[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科学与工程》2014年第4期7-10,72,共5页Journal of Transport Science and Engineering

基　　金：上海市城乡建设和交通委员会科研项目(建管2013-004-004)

摘　　要：为了解沥青路面的模量衰变特性,基于行车荷载模拟系统(MLS66),在实际路面上进行了足尺加速加载试验;并使用便携式路面分析仪(PSPA),对试验区域的地震波模量进行了测量。试验结果表明:沥青路面的地震波模量与荷载作用次数的关系曲线呈现3个阶段(1模量-荷载作用次数呈线性关系;2出现加速衰减;3趋于稳定)。荷载的间歇作用有利于地震波模量的恢复,间歇时间越长,模量恢复百分比越高,但恢复速率降低。模量衰减不限于加速加载区域,对加速加载方向前、后的影响要大于两侧的。得出了沥青路面模量的衰变规律。在常温状态下,地震波模量与路面性能在荷载作用下具有一致性。In order to study the modulus change,mobile load simulator system（MLS6 6 ） has been used to conduct full scale accelerated performance test and portable seismic pavement analyzer（PSPA）to test seismic modulus of actual asphalt pavement.The re-sults show that three stages exist in changes of seismic modulus of asphalt pavement un-der loads.Firstly,the changes show liner relationship.Secondly,the decay rate of modu-lus becomes faster.Thirdly,the decay rate becomes close to zero.The intermittent time of loads has great effects on seismic modulus,the longer the intermittent,the greater the degree of the recovery of seismic modulus.But the recovery rate becomes lower.The at-tenuation area exceeds the region of the accelerated loading test,and the changes of front and rear is greater than sides.The decay regulation of seismic modulus of asphalt pave-ment is obtained,and the consistency can be found between seismic modulus and pave-ment performance.

关 键 词：沥青路面 地震波模量 足尺加速加载 行车荷载模拟系统 

分 类 号：U416.217[交通运输工程—道路与铁道工程]