Pre-existing Crack Effect on Damage of Inner Concrete Lining under an Internal Explosion: A Numerical Study
Publish place: Journal of Mining and Environment، Vol: 14، Issue: 3
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
View: 138
This Paper With 16 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JMAE-14-3_014
تاریخ نمایه سازی: 27 تیر 1402
Abstract:
Engineers use various methods to evaluate the performance of concrete structures under dynamic loads, including numerical simulations, laboratory experiments, and field tests. By combining the results of these methods, the engineers can develop a comprehensive understanding of the behavior of concrete structures under dynamic loads and use this information to design more resilient structures capable of withstanding these loads. In this work, four models of the concrete lining of the circular tunnel are simulated to investigate the effect of the pre-cracked in the tunnel's concrete lining under an internal explosion loading. A crack in three different locations at angles of ۰, ۴۵, and ۹۰ on the horizontal axis of the tunnel is investigated and analyzed. The coupled Eulerian-Lagrangian method and the constitutive behavior, such as concrete damage plasticity for concrete and Drucker-Prager for soil, allows a more accurate simulation of the internal explosion loading scenario. The selection of Trinitrotoluene and the Jones-Wilkins-Lee equation of state for the explosive provides a realistic representation of the behavior of the explosive material. The modeling results show that in an internal explosion, by examining three different locations of a crack in the concrete, the occurrence of a crack in the crown of the tunnel is more critical than two crack locations. Hence, the existence of a crack with a length of ۱۰۰ cm and a depth of ۱۵ cm in the crown of the tunnel increases the tensile damage zone by ۱۶.۵۹% compared to the case where there is no crack.
Keywords:
Authors
Alireza Dolatshahi
Department of Mining Engineering, Faculty of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
Ali Nouri Qarahasanlou
Faculty of Technical & Engineering, Imam Khomeini International University, Qazvin, Iran
مراجع و منابع این Paper:
لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :