Development of Asphalt Concrete Stiffness Modulus Prediction Models Using Genetic Programming

سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 472

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شناسه ملی سند علمی:

CONFUCIAN02_134

تاریخ نمایه سازی: 21 شهریور 1395

چکیده مقاله:

One of the key parameters to design flexible pavements is the stiffness modulus of asphalt mixtures. This study aimed to develop models for prediction stiffness modulus of asphalt concrete using genetic programming. Due to the viscoelastic nature of asphalt mixes, the stiffness of these materials depends on temperature, loading time duration, rest period, and loading waveform. Therefore, in this paper, the authors use these parameters as independent variables to estimate stiffness of asphalt mixes under two loading waveforms (haversine and square). Stiffness modulus of asphalt mixture samples were determined using resilient modulus indirect tensile test (IDT) under haversine and square waveforms at different temperatures and loading conditions. First, two models were developed using genetic programming (GP) technique with MATLAB® genetic programming toolbox for two loading waveforms. Then, response surface models were developed using STATISTICA® software, and the developed models were evaluated. The predicted stiffness modulus was closely relevant to the measured one and prediction ability of the models was satisfactory that can be prevented from expensive and time-consuming laboratory tests

نویسندگان

Gholamali Shafabakhsh

Ph.D., Associate Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran

Amin Tanakizadeh

Ph.D. Student, Faculty of Civil Engineering, Semnan University, Semnan, Iran

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