STRATA应力吸收层对加铺层荷载及温度应力的影响分析

STRATA Stress-absorbing Layer's Impact on Load Stress and Thermal Stress in Overlay

STRATA应力吸收层是一种用于防止沥青加铺层反射裂缝的新型沥青混合料,它采用特殊聚合物对沥青进行改性,具有高弹性、不透水及抗裂性能好的优点。采用三维有限元法对设置DTRATA应力吸收层的标准加铺层结构与另两种未设置STRATA应力吸收层的对比加铺层结构进行应力分析,计算结果表明:在旧水泥混凝土路面与沥青加铺层之间设置STRATA应力吸收层后,加铺层结构的荷载应力与温度应力均有较大幅度的降低。

STRATA is a kind of new asphalt mixture with anti-crack capacity for asphalt overlay, the asphalt in STRATA is modified by using special polymer, STRATA has the advantages of high flexibility, waterproof and excellent anti-crack capability. The 3-D finite element method is used to analyze asphalt overlay with STRATA and another two kinds of asphalt overlays without STRATA, the results show that load stress and thermal stress in asphalt overlay can be reduced significantly with STRATA between old cement concrete pavement and new asphalt overlay.