نوع مقاله : مقاله عمران
نویسندگان
1 استادیار گروه عمران، واحد شهرکرد، دانشگاه آزاد اسلامی، شهرکرد، ایران
2 دانشکده مهندسی و معماری، دانشگاه تریسته، تریسته، ایتالیا
3 دانشجوی کارشناسی ارشد، گروه عمران-زلزله، واحد بوشهر، دانشگاه آزاد اسلامی، بوشهر، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
determining the behavior of bridges that were designed and implemented in the past decades based on old regulations and are still used today as access roads is very important and should be evaluated and judged. In this paper, using finite element analysis, a case study on a communication bridge with steel piers in Kazerun city is discussed and the behavior of this bridge under the effect of different explosive loads is investigated. The local failure of the bridge piers and the overall failure of the entire bridge have been evaluated using the support rotation criterion. The obtained results showed that the finite element analysis has high accuracy in predicting the behavior of the structure against explosive loads. Also, with the increase in the amount of explosive charge weight, the amount of residual displacement created in the concrete slab of the bridge increases, which leads to a change in the amount of damage from the low level to the medium level. In addition, the results showed that the use of steel beams in the longitudinal direction of the concrete slab reduces the amount of deformation caused by explosive loads, and subsequently the amount of damage caused also decreases. Also, the results showed that the closer the desired member is to the center of the explosion, the higher the local failure rate, and finally, from the place where the local failure is more, the steel piers of the bridge will suffer general failure and finally approach to collapse.
کلیدواژه‌ها [English]
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