北方交通
北方交通
북방교통
NORTHERN COMMUNICATIONS
2012年
4期
1-5
,共5页
沥青路面%有限元分析%剪应力%拉应力：荷载型裂缝
瀝青路麵%有限元分析%剪應力%拉應力：荷載型裂縫
력청로면%유한원분석%전응력%랍응력：하재형렬봉
Asphalt pavement%Finite element analysis%Shear stress%Tensile stress%Load cracking
越来越多的研究表明沥青路面轮迹带附近的荷载型裂缝与沥青面层内较大的应力水平尤其是剪应力有着直接的关系,为了探讨其破坏机理及力学成因,基于弹性层状体系在考虑水平荷载作用下进行半刚性基层路面剪应力有限元分析,分析沥青面层内剪应力分布规律,剪应力峰值变化情况,并对剪应力和拉应力进行对比分析。结合荷载型裂缝产生位置、深度等特点可以认为其产生的主要原因不是拉应力而是剪应力,对进一步研究荷载型裂缝的破坏机理、发展规律有一定的指导意义。
越來越多的研究錶明瀝青路麵輪跡帶附近的荷載型裂縫與瀝青麵層內較大的應力水平尤其是剪應力有著直接的關繫,為瞭探討其破壞機理及力學成因,基于彈性層狀體繫在攷慮水平荷載作用下進行半剛性基層路麵剪應力有限元分析,分析瀝青麵層內剪應力分佈規律,剪應力峰值變化情況,併對剪應力和拉應力進行對比分析。結閤荷載型裂縫產生位置、深度等特點可以認為其產生的主要原因不是拉應力而是剪應力,對進一步研究荷載型裂縫的破壞機理、髮展規律有一定的指導意義。
월래월다적연구표명력청로면륜적대부근적하재형렬봉여력청면층내교대적응력수평우기시전응력유착직접적관계,위료탐토기파배궤리급역학성인,기우탄성층상체계재고필수평하재작용하진행반강성기층로면전응력유한원분석,분석력청면층내전응력분포규률,전응력봉치변화정황,병대전응력화랍응력진행대비분석。결합하재형렬봉산생위치、심도등특점가이인위기산생적주요원인불시랍응력이시전응력,대진일보연구하재형렬봉적파배궤리、발전규률유일정적지도의의。
More and more evidences showed that asphalt pavement load cracking along wheelpath has direct relation to the high stress level in the asphalt pavement especially the shear stress.For the purpose of studing the shear mechanism of asphalt pavement load cracking,this paper based on elastic layered system make finite element analysis of semi-rigid asphalt pavement shear stress.The shear stress distribution regularities and maximum of shear and its direction are achieved.The locations of the shear stress and tensile stress were compared with load cracking characteristics and the maximum stress was compared with stress strength as well.The analysis shows that the major reason of asphalt pavement load cracking is shear stress not tensile stress.The research conclusions have certain guiding significance for the further study of asphalt pavement load cracking.
