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Effect of structure lifespan on scour countermeasure design using a probabilistic method | ||
| Journal of Applied Research in Water and Wastewater | ||
| دوره 10، شماره 1 - شماره پیاپی 19، شهریور 2023، صفحه 74-79 اصل مقاله (921.92 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22126/arww.2023.8660.1278 | ||
| نویسندگان | ||
| Mojtaba Karimaei Tabarestani* 1؛ Atabak Feizi2 | ||
| 1Department of Civil Engineering, Faculty of Geotechnical and Water Engineering, Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran. | ||
| 2Department of Civil Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran. | ||
| چکیده | ||
| In this study, a probabilistic method was proposed to determine the stable riprap as a scour control measure downstream of a stilling basin, using the Monte Carlo Simulation Technique. The Kan diversion dam in Iran was selected as a case study, and various uncertainties in the model, including hydraulic parameters for different design flood events, were taken into account during the analysis. Moreover, the relationship between the probability of failure, structure lifespan, and riprap sizing was also investigated. The results indicated that the estimates for riprap data followed a normal distribution. By utilizing the characteristics of this distribution, such as the mean and coefficient of variation, the stable riprap sizes were calculated based on the desired probability of failure and the structure lifespan. For instance, when considering a 5% probability of failure, the riprap size was determined to be 0.203 m for a 50-year design flood. Similarly, for larger floods, such as a 200-year design flood, the riprap size needed to be increased by 65%. Furthermore, as the structure lifespan increased from 25 years to 200 years, the riprap stone size saw an approximate 25% increase for a 200-year design flood. | ||
| کلیدواژه‌ها | ||
| Stilling basin؛ Scour countermeasure؛ Riprap size؛ Probabilistic framework؛ Structure life span | ||
| مراجع | ||
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