Research On Mechanical Properties Of T-Stub Connections Under Static Load And Strengthening Methods

Steel T-stub connection component is a component form that combines the beam and column of the steel frame together by T-stub and bolts. It’s one of the most vigorous semi-rigid connections with simple structure and superior seismic performance. Currently the connection has can be widely used in multistory steel frame building, but it exist a problem of insufficient stiffness and insufficient strength when used in high-rise buildings. In present, researchers did not pay much attention to this field in domestic and abroad, so the mechanical properties of T-stub connection under static load urgently need to be studied.This paper used ABAQUS finite element analysis software to test the numerical simulation, the reliability of the numerical simulation mode was proved through the comparison of experiment and simulation. At the same time this paper researched on changes of various factors influence on the mechanical properties of connection component, these change factors are as follows:bolt strength grade, member strength grade, friction surface resistance to sliding coefficient, pillar axis pressure, beam section size, column section size, T-stub section size, bolt diameter, bolt spacing. Then this paper put forward six strengthening schemes and did research on influence of these schemes which are as follows:increase T-stub web shearing bolt, increase upper T-stub stiffening rib, increase the width of T-stub but not increase bolts, increase the width of T-stub and increase bolts, increase single web angle steel, increase double web angle steel. It also consided various strengthening combinations on the mechanical behavior of connection component. In the end, this paper gived some valuable conclusions.