Mechanism of Transfer Story Beam-column in High-rise Buildings

Abstract

The structural layout of the transfer floor is easy to cause the discontinuity of vertical components, Sudden change of floor lateral stiffness and floor shear capacity, they were unfavorable to the calculation of the overall index of the structure. In order to study the working mechanism of single span transfer beam on the first floor of high-rise building structure with or without interaction with wall, the mechanism of the beam and column was analyzed in the transfer layer of high-rise buildings, and the calculation methods of sectional moment for inertia beam and wall by using the calculation method of bending stiffness was put forward. A simple method for calculating the according to the different arrangement of the shear wall on the single-span transfer beam was deduced, the combined action of the transfer beam-shear wall and the non-combined action of the transfer beam-shear wall has been analyzed and calculated. The results show that, when the full span of the shear wall is arranged on the transfer beam and the deformation coordination is considered, the following conclusions are verified: the flexural rigidity of the transfer beam is suitable for the joint action of the beam and the shear wall of the upper layer ( 5 times amplification); Under the "arching effect", the transfer beam and the upper shear wall transform the vertical force into the horizontal support thrust, which increases the shear force of the frame pillar. It should be considered in the design. It can be used as a reference for engineering construction and design colleagues.