宽应力比条件下的沥青混合料疲劳特性研究-改进的<em>S-N</em>模型

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Abstract The applicability of the Sigmoidal Function to describe the fatigue law of asphalt mixtures at broad stress ratio conditions was examined. This application aimed to avoid the inaccessibility of the segment function. It also sought to address the inadequacy of traditional S-N fatigue equation in analyzing the fatigue characteristics of asphalt mixtures at broad stress ratio conditions. The asphalt mixture gradation and the optimum asphalt aggregate ratio were determined with raw material testing and mixture proportion design. Fatigue tests of the asphalt mixtures were performed at broad stress ratio conditions with Material Test System-810, and results were fitted by the Sigmoidal Function. An improved S-N fatigue model was established with the Sigmoidal Function at broad stress ratio conditions. This improved model, as well as conventional models, can predict the fatigue life of asphalt mixtures. The estimated results were then compared. The improved S-N fatigue model based on the Sigmoidal Function can simulate the fatigue law of asphalt mixtures at broad stress ratio conditions. Therefore, the advantages of the new model were confirmed. The model parameters exhibit clear physical meanings whose values can be obtained easily.

Key words： road engineering fatigue equation Sigmoidal Function asphalt mixture stress ratio

Received: 17 May 2012

Fund:Supported by the National Natural Science Foundation of China (No.51038002);the Ph. D Programs Foundation of Ministry of Education of China(No.20114316120001);the Natural Science Fund Project in Hunan Province (No.10JJ4034);the Application and Basic Research Projects of Ministry of Transport(No.2012319825150);and the Key Projects of Science and Technology Plan of Hunan Province(No.2011FJ2010)

Corresponding Authors: LÜ Song-tao, lstcs@126.com E-mail: lstcs@126.com

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[1] SONSINO C M. Course of S-N Curves Especially in the High-cycle Fatigue Regime with Regard to Component Design and Safety[J]. International Journal of Fatigue, 2007, 29:2246-2258.
[2] YANG Guangwu, XIAO Shoune, JIN Dingchang. Evaluation of Fatigue Damage in Frequency Domain Based on Subsection S-N Curve[J]. Journal of Mechanical Strength, 2005,27(4):544-548. (in Chinese)
[3] HE Cai. Fatigue Test Dada Treatment and P-S-N Curve Function[J]. Automobile Technology & Material, 2007(4):42-44. (in Chinese)
[4] ZHAO Zaodong, ZHANG Lixiang, WANG Shiyue. Study of S-N and P-S-N Curve of Hydraulic Concrete[J]. Acta Mechanica Solida Sinica, 2002, 23(2):197-202. (in Chinese)
[5] NIU Xiaode, LI Guangxia, LEE H. Hardening Law and Fatigue Damage of a Cyclic Hardening Metal[J]. Engineering Fracture Mechanics, 1987,26(2):163-170.
[6] LIAO Xiaoling, LI Hejun, LI Kezhi. Influence of Stress Level on Bending Fatigue Damage Mode of 3D C/C Composite Material[J]. Science in China (Series E):Technology science, 2007,37(1):53-59. (in Chinese)
[7] CHEN Lijie, JIANG Tieqiang, XIE Liyang. Low Cycle Fatigue Life Prediction Method Based on Power-exponent Function Model[J].Journal of Mechanical Strength, 2006,28(5):761-765. (in Chinese)
[8] XIE Liyang,YU Fan.Analysis on Critical Fatigue Damage[J]. Chinese Journal of Applied Mechanics, 1994,11(3):57-62(in Chinese)
[9] DU Hongzeng, TIAN Xiuyun, ZHOU Xuan. Study on Fatigue Damage Threshold[J]. Acta Aeronautica Et Astronautica Sinica, 2003,24(3):223-225. (in Chinese)
[10] ZHANG Zhixiang, CHEN Rongsheng, BAI Qifeng. Laboratory Study of Fatigue Damage Limit of LSM Base Mixtures[J]. Journal of Highway and Transportation Research and Development, 2006,23(4):19-22. (in Chinese)
[11] PING Jiangshu,SHEN Aiqin,LI Peng. Study of Fatigue Limit of Asphalt Mixture for Perpetual Pavement[J]. China Journal of Highway and Transport, 2009,22(1):34-38. (in Chinese)
[12] XU Ouming, HAN Sen, DUAN Xiaoqi. Determination of Fatigue Ultimate Tension Strain of SBS Modified Asphalt Mixtures[J]. Journal of building materials, 2010,13(2):193-197. (in Chinese)