合肥工业大学学报（自然科学版）
閤肥工業大學學報（自然科學版）
합비공업대학학보（자연과학판）
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2014年
7期
845-849
,共5页
道路工程%黏弹性%线弹性%车辆动载响应%沥青路面
道路工程%黏彈性%線彈性%車輛動載響應%瀝青路麵
도로공정%점탄성%선탄성%차량동재향응%력청로면
road engineering%viscoelasticity%linear elasticity%vehicle dynamic load response%asphalt pavement
为研究车辆荷载作用下黏弹/弹性沥青路面模型的动态响应之间的差别，文章建立了路面的黏弹性和弹性有限元分析模型，通过施加移动车辆载荷和有限元计算，分析对比2种不同路面模型的动力响应规律，并进行了动力响应现场实测试验。结果表明：车速和温度相同条件下通过弹性本构关系计算得到的各动力响应指标的值均明显大于流变学本构关系计算值，最大相差超过35％。基于流变学模型计算得到的应变值与应变试验测试值的误差基本在20％以内，这说明建立的黏弹性路面模型能较好地模拟实际车辆动荷下路面的力学响应。
為研究車輛荷載作用下黏彈/彈性瀝青路麵模型的動態響應之間的差彆，文章建立瞭路麵的黏彈性和彈性有限元分析模型，通過施加移動車輛載荷和有限元計算，分析對比2種不同路麵模型的動力響應規律，併進行瞭動力響應現場實測試驗。結果錶明：車速和溫度相同條件下通過彈性本構關繫計算得到的各動力響應指標的值均明顯大于流變學本構關繫計算值，最大相差超過35％。基于流變學模型計算得到的應變值與應變試驗測試值的誤差基本在20％以內，這說明建立的黏彈性路麵模型能較好地模擬實際車輛動荷下路麵的力學響應。
위연구차량하재작용하점탄/탄성력청로면모형적동태향응지간적차별，문장건립료로면적점탄성화탄성유한원분석모형，통과시가이동차량재하화유한원계산，분석대비2충불동로면모형적동력향응규률，병진행료동력향응현장실측시험。결과표명：차속화온도상동조건하통과탄성본구관계계산득도적각동력향응지표적치균명현대우류변학본구관계계산치，최대상차초과35％。기우류변학모형계산득도적응변치여응변시험측시치적오차기본재20％이내，저설명건립적점탄성로면모형능교호지모의실제차량동하하로면적역학향응。
To research the difference of dynamic response between the viscoelastic and elastic asphalt road models under vehicle loads ,a three-dimensional transient finite element model of asphalt pave-ments is established .By applying vehicle dynamic loads on the two kinds of road models and the non-linear finite element calculation ,the dynamic response laws of the two kinds of road models are ana-lyzed and compared ,and the in-situ test of the strain is done according to the result of the simulation . The results show that all kinds of responses by the elastic model are obviously higher than those of the viscoelastic model under the same speed and temperature conditions ,and especially the largest differ-ence is more than 35% .But the difference of strain value between the viscoelastic simulation and the experimental test is less than 20% ,which proves that the viscoelastic model can simulate well the me-chanical response of pavements under vehicle loads .
