【摘要】：瀝青混凝土路面主要破壞形式為疲勞破壞。分析了瀝青膠漿粘彈性疲勞損傷原理,建立了粘彈性連續(xù)損傷力學模型,根據ANSYS9.0軟件模擬計算得出以下幾點結論:相同粉膠比下SBS改性瀝青損傷速率小于高粘高彈瀝青;材料損傷速率越低疲勞壽命越長,膠漿疲勞性能受粘彈性影響較大。在溫度為15℃1 000次疲勞荷載作用不同級配瀝青混合料情況下,當粘彈比從8增大到9.5過程中瀝青豎向變形從2 mm增大到6 mm翻了三倍,在實際工程中可適當降低粘彈比以減弱瀝青路面豎向變形;在疲勞荷載為4 000次情況下AC-5級配類型豎向變形約為AC-13級配類型豎向變形的兩倍,前者存儲模量大于后者導致變形積累速率小于后者。
[Abstract]:The main failure form of asphalt concrete pavement is fatigue failure. The viscoelastic fatigue damage principle of asphalt paste is analyzed, and the viscoelastic continuous damage mechanics model is established. According to the simulation calculation of ANSYS9.0 software, the following conclusions are drawn: the damage rate of SBS modified asphalt is lower than that of high viscosity and high elastic asphalt under the same powder / binder ratio; The lower the damage rate, the longer the fatigue life, the fatigue property of the paste is greatly affected by viscoelasticity. When the temperature is 15 鈩，

本文編號：2213366