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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Application and simplification of GLS model for asphalt mixture

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沥青混合料 GLS 模型的应用和简化

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Feb.2025, Vol.48 No.2: 274-282

DOI: 10.3969/j.issn.1003-5060.2025.02.020

Authors

DU Qingcan, HAN Ding, ZHOU Penghong

(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: On the premise of maintaining the applicability of the Generalized Logistic Sigmoidal(GLS) model, fixing partial parameters can improve the convenience and application values of the model according to the characteristics of asphalt mixture. Based on test data of asphalt mixture containing storage, storage and loss, and dynamic moduli, three residual fitting functions were established respectively, and the differences of these functions using different shift factors to construct various master curves were compared. For the GLS model describing asphalt mixture, a new method was established to classify the sensitivity of the parameters, and then fixed values of the insensitive parameters were obtained based on 65 groups of test data. The results show that the GLS model is suitable to use the residual function Fit- $ E_{dyn} $ and the shift factor Kaelble for asphalt mixture; the parameters $ \lambda $ and $ \beta $ can be fixed; in addition, the parameter $ \gamma $ can also be fixed when the requirement for fitting accuracy is not high. This work can be used to further analyze the correlation between fewer model parameters of the simplified GLS model and material properties of asphalt mixture.

Keywords: asphalt mixture; Generalized Logistic Sigmoidal(GLS) model; master curve; shift factor; parameter sensitivity

作者信息

杜庆灿，韩丁，周鹏鸿

（合肥工业大学土木与水利工程学院，安徽合肥230009）

摘要和关键词

摘要: 文章在保持广义西格摩德(Generalized Logistic Sigmoidal, GLS)模型适用性的前提下, 根据沥青混合料的特点固定部分模型参数能提高该模型的便捷性和应用价值, 分别采用沥青混合料存储、存储和耗散、动态模量的实验数据建立3种残差拟合函数, 并比较3种函数采用不同位移因子构建各类主曲线的差异性。当沥青混合料采用GLS模型时, 建立方法对参数进行敏感性分级, 并基于65组实验数据获取可固定的参数值。结果表明: 对沥青混合料, GLS模型适合采用残差函数Fit-E $ _{dyn} $和位移因子Kaelble; 参数 $ \lambda $和 $ \beta $可以固定; 拟合精度要求不高时, 参数 $ \gamma $也可以固定。该研究得到的简化GLS模型可用于进一步分析较少的模型参数与沥青混合料材料特性的相关性。

关键词: 沥青混合料；广义西格摩德(GLS)模型；主曲线；位移因子；参数敏感性

Funding

交通工程结构力学行为与系统安全国家重点实验室开放课题资助项目（KF2021-02）

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