本文關(guān)鍵詞：RoadMesh路面加筋網(wǎng)本構(gòu)模型研究　出處：《長沙理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： RoadMesh 本構(gòu)關(guān)系 離散元法 拉伸試驗 彈塑性模型 擬合 力學(xué)分析

【摘要】：為了準確分析RoadMesh路面加筋網(wǎng)的加筋機理,通過材料性能試驗確定RoadMesh的力學(xué)性能參數(shù),據(jù)此通過擬合分析其材料本構(gòu)模型,并采用離散元法以試驗數(shù)據(jù)進行校準驗證,確定合理的RoadMesh數(shù)值仿真模型,為RoadMesh加筋瀝青路面的理論研究提供借鑒。(1)采用自制夾具分別對RoadMesh各組成鋼絲及縱、橫向鋼絲網(wǎng)面進行了室內(nèi)拉伸試驗,通過試驗結(jié)果分析,得到了各材料的拉伸應(yīng)力-應(yīng)變關(guān)系曲線。同時,以彈塑性理論為基礎(chǔ),從工程應(yīng)用出發(fā),采用擬合計算描述了各材料的力學(xué)性能,建立了彈塑性應(yīng)力-應(yīng)變關(guān)系模型。通過對比各種材料的擬合曲線和實測曲線,確定了合適的RoadMesh本構(gòu)方程。(2)采用離散元法和顆粒流遠程交互彈塑性模型,建立了合理的RoadMesh離散元模型,同時通過試驗數(shù)據(jù)校準和驗證了數(shù)值仿真模型。結(jié)果表明,當(dāng)應(yīng)變修正系數(shù)為0.4和剛度修正系數(shù)為0.5時,RoadMesh在整個加載路徑的數(shù)值模擬曲線與試驗結(jié)果曲線基本吻合,從而確定了合理的RoadMesh數(shù)值模型,并通過數(shù)值仿真模型確定了當(dāng)橫向長度超過臨界值后,RoadMesh的拉伸強度和拉伸率幾乎不受尺寸變化的影響。(3)利用室內(nèi)組合試件彎拉試驗?zāi)M瀝青路面抗反射裂縫和抗差異沉降力學(xué)響應(yīng)的影響規(guī)律。結(jié)果顯示,對比未加筋模擬試驗,RoadMesh加筋的抗反射裂縫模型和抗差異沉降模型的抗彎拉強度分別提高了46.10%和34.52%,抗彎拉應(yīng)變分別增加了11.34%和13.09%,彎曲勁度模量分別增加了31.20%和18.93%。因此,RoadMesh路面加筋網(wǎng)對提高瀝青路面抗反射裂縫和抗差異沉降都能起到很好的作用。總之,本文的研究為RoadMesh路面加筋網(wǎng)在瀝青路面加筋工程中的機理分析和實際應(yīng)用提供了科學(xué)依據(jù)。
[Abstract]:In order to accurately analyze the reinforcement mechanism of RoadMesh reinforced pavement, mechanical parameters of RoadMesh are determined by the material performance test, according to the analysis by fitting the material constitutive model, and using the discrete element method was used to determine the calibration and validation of experimental data, numerical simulation of the RoadMesh model, to provide reference for the theoretical study of RoadMesh reinforced asphalt pavement. (1) using the self-made fixture of RoadMesh steel wire and the longitudinal tensile test, indoor horizontal steel mesh, through analysis of test results, obtained the material tensile stress-strain curve. At the same time, based on the elastic-plastic theory, starting from the engineering application, the fitting calculation description the mechanical properties of different materials, establish elastic-plastic stress-strain relation model. Through the comparison of various materials of the fitting curve and the experimental curve, the constitutive equation of RoadMesh (right. 2) flow remote interactive elastoplastic model using discrete element method and particle discrete element model was built for RoadMesh reasonable, at the same time the test data to calibrate and validate the numerical simulation model. The results show that when the strain is 0.4 and the correction coefficient of stiffness correction coefficient is 0.5, RoadMesh simulation curves and experimental curves agree with the results in the numerical loading path, so as to determine the RoadMesh numerical model is reasonable, and the numerical simulation model to determine when the transverse length exceeds the critical value, influence the tensile strength and tensile modulus of RoadMesh is almost not affected by the change in size. (3) the use of indoor combined specimen bending test of asphalt pavement reflection crack resistance and simulation the differential settlement of the mechanical response of anti influence. The results showed that compared with the unreinforced simulation test, anti reflection crack model of reinforced RoadMesh and flexural strength of the anti settlement model respectively. Increased by 46.10% and 34.52%, 11.34% and 13.09% increase in flexural strain, bending stiffness modulus were increased by 31.20% and 18.93%. so RoadMesh pavement reinforced to improve the anti cracking and anti differential settlement can play a good role in asphalt pavement. In conclusion, this study provides a scientific basis for RoadMesh pavement Reinforced Asphalt Pavement Reinforcement Mechanism Analysis in engineering and practical application.

【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.2

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1 朱凱;RoadMesh路面加筋網(wǎng)本構(gòu)模型研究[D];長沙理工大學(xué);2015年

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本文編號：1421087