Investigation of behavior of the longitudinal restrain of headed bar reinforcement in beam–column joint

MirMasoud Sattari Oskouei¹

1) Islamic Azad University of Shabestar Branch ,

IOI Code : XBAA-DZGAB
Publication : International Congress on Engineering science and Sustainable Urban Development - Copenhagen (dtuconf.eu)
Abstract :
    In a structure, the connections are very important elements. Despite using the most powerful columns and beams in the structure, poor connections can cause structural instability. In a structure, the connections are very important elements. Despite using the most powerful columns and beams in the structure, poor connections can cause structural instability. To prevent damage or pulled shear beam rebar, beam design codes are required in connection column, transverse hooks and stirrups as shear reinforcement and concrete core surrounded by a rigid beam and bars in connection with the charisma enough to continue. Bars in concrete structures to harness connections column of reinforced concrete beam, normally used standard hooks 90 degrees. This method constructs a heavy heavy investment Fittings and has led to congestion-diameter steel bars that increase costs and may also reduce the connection quality and performance will follow. To compensate for such problems, the use of cap bars with a very good solution for this issue is that its use is expanding. However, current standards are a lot of shortcomings in existing procedures. Among the requirements are strict regulations about free bars cap of ACI 318-11 is a non-executive look. In this thesis, ABAQUS finite element modeling will be done using software. First, using an in vitro study by Mihaylov et al 2013 on the use of rebar caps are examined in the beam, using the finite element software ABAQUS, modeling was carried out to verify survey modeling cap reinforcement in concrete beams evaluated. Then, a 5-storey building concrete moment frame with software designed to ETABS beam and column dimensions and the amount of reinforcement beams and columns are obtained and with regard to a beam to column floor and the cap of reinforcement bars with hooks instead of 90 degrees, put under increasing load and the effect of rebar up to the cap size, cap size and length inhibitory column, to check parameters such as ductility, high resistance as well as the amortization of the total energy will be discussed.

Keywords : beam and column concrete headed bars finite element cyclic loading strength and ductility