Punching Behaviour of Flat Slab Interior Column Connection with Openings

Abstract

This thesis aimed to investigate the punching shear behavior of flat slab interior column connection with openings. In order to achieve this purpose, numerical study was conducted on twenty-six full scale specimens to investigate the punching shear behavior focusing on five main parameters. The investigated parameters were the opening size and its location, the flexural reinforcement ratio, the existence of shear reinforcement, different column aspect ratio, and the eccentricity of the applied load. A literature review was provided in Chapter 2 for previous studies in the filed of slab-column connections with and without openings or vertical shear reinforcement. A background of punching shear behavior of flat slab with openings and the risk of punching shear failure. Chapter 3 presented detailed 3-D numerical models that were modeled using finite element analysis software ANSYS 19 [24] to validate the analytical results using previous experimental work done by Anil et al. [25]. A comparison between the recorded experimental results and the analytical results is provided and discussed in this chapter, this validation was necessary to make sure that the analytical results obtained from the finite element modeles developed using ANSYS 19 [24] are reliable and satisfactory and can be used in the work of the parametric study of punching shear behavior of the flat slab with openings focusing on the effect of various parameters. In chapter 4, detailed 3-D numerical models were modeled using ANSYS 19 [24]. Twenty-six specimens were developed to investigate the punching shear behavior with one or more parameter combinations. The effect of opening size and location, the existence of shear reinforcement, the flexural reinforcement ratio, column aspect ratio, and the eccentricity of the applied load on the punching behavior of interior slab-column connection with opening is provided. And EC2 [21], ACI [22], and ECP [23] codes provisions compared to the obtained analytical results is also provided and discussed.