نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران
2 گروه عمران دانشکده مهندسی، دانشگاه فردوسی مشهد، مشهد، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
If unpredictable loads are applied to the flat slab-column connections, punching shear
failure occurs with almost no warning signs. According to the brittle manner of this failure, the load
carried by the slab-column connection redistributes to adjacent supports and causes overloading to these
supports. Due to this overloading and brittle nature of punching shear failure, progressive collapse may
happen both horizontally or vertically. In order to prevent the progressive collapse of flat slab-column
connections, it is necessary to provide a secondary load carrying mechanism after punching shear. In this
Paper, Suggestions for establishing a supporting mechanism in the flat slab connections after punching
failure are proposed. For this purpose, an experimental study was performed to investigate the postpunching behavior of 9 slab specimens with various reinforcement layouts and concrete covers. The
effects of integrity, compressive and bent-up reinforcements, diameter of tensile reinforcements, and
concrete cover of tensile reinforcements on the post-punching behavior of slab-column connections were
studied. The results of the experiments show that the integrity reinforcements significantly improve the
post-punching strength. The compressive reinforcements may not increase post-punching strength. The
increase of the concrete cover of the tensile reinforcements and decrease of the diameter of the tensile
reinforcement result in an increase of the post-punching strength. The bent-up reinforcement increases
the punching and post-punching strengths, simultaneously.
کلیدواژهها [English]