A study on shear forces transfer of connections involving steel beams and concrete-filled steel tubular columns

Author(s)

Cynthia Meilli Silva Araujo

• Document type: Master's Dissertation
• Press: São Carlos.
• Institution: Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD)
• Defense date: 2009-09-08

Examining board members

Ana Lucia Homce de Cresce El Debs; Antonio Alves Dias; Ricardo Hallal Fakury

• Advisor: Ana Lucia Homce de Cresce El Debs

Abstract

In the design of concrete-filled steel tubular columns, the concrete and the steel tube must work together in order to achieve the overall resistance, stiffness and stability requirements. It is important that exists an adequate mechanism to transfer the forces from the steel beam to the steel tube, and then to the concrete core. This work presents a study on shear transfer in connections involving concrete-filled steel tubular columns and steel beams. The work was divided in two parts, being the first an experimental analysis with push-out tests, and the second one a numerical simulation of the tests, using the software DIANA. The tested specimens were 800 mm height , with square section (200 x 200 x 6,3mm) obtained from two welded U-shape profiles. A concrete with compressive strength of 50 MPa was used as a filling for the columns. Altogether, three connections with steel end plates and passing bars were tested. Two types of shear connectors between steel column and concrete core were used: stud-bolts and angles, and a reference specimen without connectors was also tested. The results showed the efficiency of the shear connectors in the tranference of forces. (AU)