荷载低温干燥条件下路面混凝土强度损伤及寿命预测模型

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摘要 After defining fatigue damage variable and constructing residual flexural strength damage model,nonlinear mathematical equations of residual flexural strength and parameters,such as number of loads andfunction time in low temperature and dry environment,were established to research residual flexural strength and fatigue life of cement concrete pavement in northern cold regions under low-loading and temperature-drying conditions, to identify mechanism of fatigue damage in concrete pavements and residual life prediction model, and to verify accuracy of the model through experiments.These equations can better reflect lawsgoverning mechanical property damage of concrete pavements after fatigue. S-N fatigue life curvilinear equation and failure probability were introduced to analyze fatigue life of concrete pavements. Results indicated that the single logarithmic equation can be used to predict fatigue life of concretes with different failure probabilities, and in this case, fatigue life curve conforms to Weibull distribution function. This paper also provides specific double-parameter Weibull distribution function under loading-low temperature-drying conditions.

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	周胜波
	梁军林
	申爱琴

关键词 ： road engineering, fatigue life, loading low temperature drying, residual flexural strength, pavement cement concrete

Abstract：After defining fatigue damage variable and constructing residual flexural strength damage model,nonlinear mathematical equations of residual flexural strength and parameters,such as number of loads andfunction time in low temperature and dry environment,were established to research residual flexural strength and fatigue life of cement concrete pavement in northern cold regions under low-loading and temperature-drying conditions, to identify mechanism of fatigue damage in concrete pavements and residual life prediction model, and to verify accuracy of the model through experiments.These equations can better reflect lawsgoverning mechanical property damage of concrete pavements after fatigue. S-N fatigue life curvilinear equation and failure probability were introduced to analyze fatigue life of concrete pavements. Results indicated that the single logarithmic equation can be used to predict fatigue life of concretes with different failure probabilities, and in this case, fatigue life curve conforms to Weibull distribution function. This paper also provides specific double-parameter Weibull distribution function under loading-low temperature-drying conditions.

Key words： road engineering fatigue life loading low temperature drying residual flexural strength pavement cement concrete

收稿日期: 2016-06-19

基金资助:Supported by the National Natural Science Foundation of China (No.51278059); the Natural Science Foundation of Guangxi (No.GUIKE AC16380109)

通讯作者: ZHOU Sheng-bo E-mail: zhoushengbo2005@163.com

引用本文:

周胜波, 梁军林, 申爱琴. 荷载低温干燥条件下路面混凝土强度损伤及寿命预测模型[J]. Journal of Highway and Transportation Research and Development, 2017, 11(2): 9-13.
ZHOU Sheng-bo, LIANG Jun-lin, SHEN Ai-qin. A Strength Damage and Fatigue Life Prediction Model of Pavement Cement Concrete under Loading Low Temperature-Drying Conditions. Journal of Highway and Transportation Research and Development, 2017, 11(2): 9-13.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2017/V11/I2/9

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