نویسندگان
1 استادیار دانشگاه مهندسی رجا قزوین ایران
2 کارشناسی ارشد، گروه مهندسی عمران، موسسه آموزش عالی پارسیان، قزوین، ایران
3 کارشناس آزمایشگاه بتن و مصالح ساختمانی، گروه مهندسی عمران، دانشگاه بین‌المللی امام خمینی(ره)، قزوین، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In addition to higher carrying capacity, ballastless railways require lower maintenance costs than ballasted ones. Nevertheless, the rail seat abrasion (RSA) is one of the most important factors of damage to the slab railways. In this study, the effect of RSA on the performance of prestressed concrete slabs has been investigated using finite element method. For this purpose, the loss of prestressing force without considering abrasion, abrasion of 5.12, 25 and 37.5 mm with different values of loss of prestressing force, abrasion of 5.37 mm with different values of compressive strength and different values of abrasion along with the removal of prestressing force in the longitudinal direction in the structure has been checked. The results showed that due to the linear behavior of concrete under the range of loading and the absence of cracks in the structure, changes in prestressing force, removal of prestressing force in the longitudinal direction have minor effect on the mid-span displacement (<2%). However, with increasing the prestressing force drop from 10% to 20%, the displacement is reduced by 50%. In general, it can be found that increased abrasion reduces the capacity of railway. The effect of increasing the abrasion on the maximum mid-span displacement in prestressed concrete slab line is not linear and the higher the amount of abrasion, the greater the amount of displacement increases.
کلیدواژه‌ها [English]
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