پژوهشنامه حمل و نقل

پژوهشنامه حمل و نقل

تاثیر الگوی بارگذاری بر رفتار مخلوط های آسفالتی در آزمایش خمش نیم دایره

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشجوی دکتری، گروه راه و ترابری، دانشکده عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
2 استادیار، گروه راه و ترابری و حمل ونقل، دانشکده عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
چکیده
هدف اصلی این مطالعه ارزیابی تأثیر متغیرهایی مانند الگوی بارگذاری، سرعت و اثر متقابل محورها بر تعداد سیکل‌های بارگذاری مخلوط‌های آسفالتی و مقایسه تعداد سیکل‌های بارگذاری با استفاده از آزمون خمش نیم‌دایره در دو حالت برشی (II) و ترکیب برشی- خمشی (I/II) بوده است. سه الگوی بارگذاری متناظر با محورهای تکی، دوتایی و سه‌تایی با سطح اثر متقابل محورهای %25 و %75 فرض شده است. این تحقیق بر اساس زمان بارگذاری مربوط به سرعت‌های 32 (200 میلی ثانیه) و 64 (100 میلی ثانیه) کیلومتر بر ساعت مورد تحلیل قرار گرفته است. نتایج موارد زیر را نشان داد: نوع محور بر مقدار خرابی شیارشدگی رویه های آسفالتی تاثیر نسبتا ناچیزی دارد، که بیشترین اثرات مربوط به الگوی بارگذاری دوتایی و در حدود 20 درصد می‌باشد؛ روابط ریاضی می‌تواند جهت پیش بینی اثرات الگوی بارگذاری در حالت‌های مختلف موثر باشد و همبستگی زیادی بین تعداد سیکل بارگذاری در حالت آزمایش و حالت فرمول وجود دارد؛ کاهش سرعت منجر به افزایش مقدار ناچیز کرنش اولیه یا خرابی شیارشدگی در روسازی های آسفالتی می شود، بنابراین می‌توان نتیجه گرفت که تاثیر مدت زمان بارگذاری وسایل نقلیه بر روسازی‌ها در طول دوره های اولیه بهره برداری بیشتر می باشد؛ با کاهش فاصله بین محورهای وسیله نقلیه خرابی شیارشدگی بیشتر می شود. با مقایسه مقدار f_1 در هر دو سطح می توان مشاهده کرد که این مقدار در سطح %75 حدود 25 درصد بیشتر می شود.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

The Effect of Loading Pattern on the Behavior of Asphalt Mixtures in Semi Circular Bending Test

نویسندگان English

Amin Teymori 1
Alireza Sarkar 2
1 Ph.D., Student, Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2 Assistant Professor, Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
چکیده English

The main objective of this study was to evaluate the effect of variables such as loading pattern, speed and axle interaction on the number of loading cycles of asphalt mixtures and to compare the number of loading cycles using the semi-circular bending test in two shear (II) and shear-flexural combination (I/II) modes. Three loading patterns corresponding to single, double and triple axles with axle interaction levels of 25% and 75% were assumed. This study was analyzed based on loading times corresponding to speeds of 32 (200 ms) and 64 (100 ms) km/h. The results showed the following: the type of axle has a relatively small effect on the amount of rutting damage of asphalt pavements, with the largest effects related to the double loading pattern and about 20%; mathematical relationships can be effective in predicting the effects of the loading pattern in different modes and there is a high correlation between the number of loading cycles in the experimental mode and the formula mode; Decreasing speed leads to a slight increase in the initial strain or rutting failure in asphalt pavements, so it can be concluded that the effect of vehicle loading duration on pavements is greater during the initial periods of operation; rutting failure increases with decreasing vehicle wheelbase. Comparing the value of f_1 at both levels, it can be seen that this value increases by about 25% at the 75% level.

کلیدواژه‌ها English

Semi-Circular Bending Test
Fracture Mechanics
Cracked Sections
Number of Loading Cycles
 -A. Standard 8044-16. (2016). Standard Test Method for Evaluation of Asphalt Mixture Cracking Resistance using the Semi-Circular Bend Test (SCB) at Intermediate Temperatures., Book of Standards, Vol. 4, (n.d.).
-Aliha, M. M., Behbahani, H., Fazaeli, H., & Rezaifar, M. H. (2015). Experimental study on modeI fracture toughness of different asphalt mixtures. Scientia Iranica, 22(1), 120-130.
-Al-Suleiman, T. I., & Adnan­, M. S. (2003). Prediction of pavement remaining service life using roughness data—Case study in Dubai. International Journal of Pavement Engineering, 4(2), 121-129.
-Archilla, A. R., Diaz, L. G., & Carpenter, S. H. (2007). Proposed method to determine the flow number in bituminous mixtures from repeated axial load tests. Journal of Transportation Engineering, 133(11), 610-617.
-Das, A., & Pandey, B. B. (1999). Mechanistic-empirical design of bituminous roads: an Indian perspective. Journal of Transportation Engineering, 125(5), 463-471.
-Fadaei, M. and Sarkar, A. (2018). Notched Asphalt Mixture Behavior under Waveform Loading Using Semi-Circular Bending Test (SCB). Journal of Transportation Research15(1), 149-159.
-Hossain, M., & Zhong , W. (2002). Estimation of asphalt pavement life. (No. K-TRAN: KSU-97-6).
-Huang, B., Shu, X., & Tang, Y. (2005). Comparison of semi-circular bending and indirect tensile strength tests for HMA mixtures. In Advances in Pavement Engineering, 1-12.
-Huang, Y. H. (2004). Pavement analysis and design. In Y. H. Huang, Pavement Analysis and Design Upper Saddle River: NJ: Pearson Prentice Hall. Vol. 2, 401-409.
-Janssen, M., Jan , Z., & Russell , W. (2004). Fracture Mechanics: Fundamentals and Applications. CRC Press.
-Khademzadeh, M., & Sarkar, A. (2024). Laboratory vibration testing and analysis of hot mix asphalt mixture under different loading patterns. Construction and Building Materials, 417, 135224.
 -Khademzadeh, M., & Sarkar, A. (2025). Lab-based dynamic spectrum investigation of asphalt mixtures under various loading conditions using fast Fourier transform. International Journal of Pavement Engineering26(1).
doi.org/10.1080/10298436.2025.2498079
-Li, X. J., & Marasteanu, M. O. (2010). Using semi circular bending test to evaluate low temperature fracture resistance for asphalt concrete. Experimental Mechanics, 50, 867-876.
-Luo, L., Erarslan, N., & Mu, Z. (2014). Mixed-Mode Fracturing of Concrete—Numerical and Experimental Study using SCCD Specimens. In Recent Advances in Material, Analysis, Monitoring, and Evaluation in Foundation and Bridge Engineering, 25-37.
-Mallick, R. B., & El-Korchi, T. (2008). Pavement Engineering: Principles and Practice. CRC Press.
-Mansourkhaki, A., Yeganeh, S., & Sarkar, A. (2014). Numerical comparison of pavement distress due to moving load under dual-wheel tandem and tridem axles. International Journal of Transportation Engineering2(1), 31-46.
-Mansourkhaki, A., & Sarkar, A. (2015a). Fatigue performance of asphalt mixture under actual loading patterns at different pulse durations. Journal of Testing and Evaluation, 43(4), 867-877.
-Mansourkhaki, A., & Sarkar, A. (2015b). Plastic deformation of asphalt mixture under waveform loading. Proceedings of the Institution of Civil Engineers-Transport.
-Mansourkhaki, A., Sarkar, A., & Ameri, M. (2015). Impact of different loading patterns with short duration on the permanent strain of asphalt mixture. Journal of Testing and Evaluation, 43(4), 853-866.
-Na Chiangmai, C. (2010). Fatigue-fracture relation on asphalt concrete mixtures. PhD diss., University of Illinois at Urbana-Champaign.
-Park, H. M., & Kim, Y. R. (2003). Prediction of remaining life of asphalt pavement with falling-weight deflectometer multiload-level deflections. Transportation Research Record, 1860(1), 48-56.
-Rushing, J. F., & Little, D. N. (2014). Static creep and repeated load as rutting performance tests for airport HMA mix design. Journal of Materials in Civil Engineering, 26(9), 04014055.
-Saadeh, S., Renteria, D., Mahmoud, E., & Eljairi, O. (2018). Numerical evaluation of semicircular bending test variability. Journal of Materials in Civil Engineering, 30(6), 04018085.
-Saleh, M. (2016). A mechanistic empirical approach for the evaluation of the structural capacity and remaining service life of flexible pavements at the network level. Canadian Journal of Civil Engineering, 43(8), 749-758.
-Sarkar, A. (2016). Numerical comparison of flexible pavement dynamic response under different axles. International Journal of Pavement Engineering, 17(5), 377-387.
-Sarkar, A. (2017). Combined effect of loading pattern, pulse duration, and stress level on the cyclic creep test of asphalt mixture. Journal of Materials in Civil Engineering, 29(1), 04016185.
-Smith, R. E. (1986). Structuring A Microcomputer Based Pavement Management System For Local Agencies (Public Works, Infrastructure Management). University of Illinois at Urbana-Champaign.
-Sun, L., Ren, J., & Zhang, S. (2018). Fracture characteristics of asphalt concrete in mixed-loading mode at low-temperature based on discrete-element method. Journal of Materials in Civil Engineering, 30(12), 04018321.
-Zarei, Z., J. Sadeghi, and A. Sarkar, (2022). Evaluation of heavy-vehicle-induced vibrations running on asphalt pavements. Construction and Building Materials, 358, 129398-129399.
-Zarei, Z.­, Mir Mohammad Sadeghi, S. J. and Sarkar, A. (2022). Investigation in to the Effect of Trench Depth on Reducing Vibrations Caused by the Passage of Heavy Vehicles. Journal of Transportation Research19(3), 1-12.
doi: 10.22034/tri.2021.313907.2976
-Zhang, J., Sakhaeifar, M., Little, D. N., Bhasin, A., & Kim, Y. R. (2018). Characterization of crack growth rate of sulfur-extended asphalt mixtures using cyclic semicircular bending test. Journal of Materials in Civil Engineering, 30(12), 04018311.
-Zhou, F., Scullion, T., & Sun, L. (2004). Verification and modeling of three-stage permanent deformation behavior of asphalt mixes. Journal of Transportation Engineering, 130(4), 486-494.