本文關(guān)鍵詞：車轍預(yù)估模型研究　出處：《公路》2015年02期 　論文類型：期刊論文

  更多相關(guān)文章： 瀝青混凝土路面 車轍預(yù)估 漢堡車轍 行車速度

【摘要】：論文旨在依托漢堡車轍試驗(yàn)建立起高精度的車轍預(yù)估模型。對(duì)6種混合料進(jìn)行不同溫度與輪載壓力下的漢堡車轍試驗(yàn),以及標(biāo)準(zhǔn)條件下的抗剪強(qiáng)度試驗(yàn),借助ABAQUS軟件計(jì)算漢堡車轍試件的最大剪應(yīng)力;以6種瀝青混合料的漢堡車轍深度、試驗(yàn)溫度、最大剪應(yīng)力、抗剪強(qiáng)度和加載次數(shù)作為基礎(chǔ)參數(shù),通過多元擬合分析,建立起基準(zhǔn)速度為66km/h的簡(jiǎn)化車轍預(yù)估模型;基于瀝青混合料的時(shí)間硬化蠕變模型,理論推導(dǎo)行車速度與路面車轍的關(guān)系,將簡(jiǎn)化的車轍預(yù)估模型經(jīng)速度修正后得到最終的車轍預(yù)估模型。研究結(jié)果表明,溫度對(duì)瀝青混合料永久變形的影響很大,當(dāng)其他條件相同時(shí),70℃的車轍深度約為50℃的4.5倍;輪載壓力是影響混合料永久變形的另一敏感因素,當(dāng)其他條件相同時(shí),0.7 MPa的車轍深度約為0.5 MPa的1.7倍;混合料永久變形與加載次數(shù)呈非線性關(guān)系;所建立的車轍預(yù)估模型中的各個(gè)變量對(duì)方程均有顯著意義,實(shí)測(cè)值與預(yù)估值具有很高的擬合度,說明該模型是可接受的,且可預(yù)估任意行車速度下的路面車轍。
[Abstract]:The purpose of this paper is to establish a high-precision rut prediction model based on the Hamburg rutting test, to carry out the Hamburg rutting test under different temperature and wheel load pressure and the shear strength test under the standard conditions. The maximum shear stress of Hamburg rutting specimen was calculated by ABAQUS software. The rutting depth, test temperature, maximum shear stress, shear strength and loading times of six kinds of asphalt mixtures were taken as the basic parameters, and the multivariate fitting analysis was carried out. A simplified rut prediction model with a benchmark velocity of 66 km / h is established. Based on the time hardening creep model of asphalt mixture, the relationship between driving speed and road rutting is deduced theoretically, and the final rutting prediction model is obtained by modifying the simplified rut prediction model through velocity correction. The temperature has a great effect on the permanent deformation of asphalt mixture, and the rutting depth of 70 鈩，

本文編號(hào)：1357104