Numerical analysis for the influence of saturation on the base course of permeable pavement with a novel polyurethane binder
Numerical analysis for the influence of saturation on the base course of permeable pavement with a novel polyurethane binder
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DOI：
10.1016/j.conbuildmat.2019.117930
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发表时间：
2020-04-20
影响因子：
7.4
通讯作者：
Grabe, Juergen
中科院分区：
文献类型：
--
作者：
Lu, Guoyang;Liu, Pengfei;Grabe, Juergen
透水路面是优化传统密封路面基础设施的有效方法。与密封路面结构相比，多孔路面结构允许流体自由通过，减少和控制周围区域的径流。该路面系统在不同饱和度条件下的应力状态是路面设计最重要的挑战之一。本研究旨在通过考虑水力相互作用，开发不同饱和度条件下路面材料的模量折减方法。为了实现这一目标，本研究建造了一条全尺寸透水测试跑道。采用落锤挠度计（FWD）测量不同饱和状态下试验轨道的挠度。使用反算的弹性参数，创建轮胎-路面相互作用模型，对加速路面试验（APT）荷载作用下的试验跑道的应力状态进行有限元法（FEM）模拟。结果表明，试验跑道的水力学性能受含水量影响显着。因此，当前全渗透路面的设计算法应考虑饱和的影响，以改进全渗透路面的设计。 (C) 2019 Elsevier Ltd. 保留所有权利。
Permeable pavements represent an effective approach to optimize the conventional sealed pavement infrastructure. Compared to sealed pavement structures, the porous pavement structure allows fluids to pass through it freely, reducing and controlling runoff in the surrounding area. The stress state of this pavement system under different saturation conditions is one of the most important challenges for the pavement design. This study aims to develop a modulus-reduction method for the pavement material under different saturation conditions by considering hydro-mechanical interaction. To achieve this, a full-scale permeable test track was constructed in this study. A falling weight deflectometer (FWD) was used to measure the deflection of the test track at different saturation states. Using the back-calculated elastic parameters, tire-pavement interaction models were created to conduct finite element method (FEM) simulations of the stress state of the test track subjected to the loads from Accelerated Pavement Testing (APT). The results show that the hydro-mechanical properties of the test track are significantly affected by the water content. As a result, the current design algorithm of fully permeable pavements should consider the effects of saturation to allow for improved designs of fully permeable pavements. (C) 2019 Elsevier Ltd. All rights reserved.