Semi-rigid composite connections with steel beams and precast hollowcore slabs
The main objective of this thesis is to develop an insight into the behaviour of semi-rigid composite connection utilizing steel beams acting in combination with precast concrete hollowcore floor slabs and to produce design recommendations for the application of this type of construction in the industry.
Eight full scale tests of beam-to-column semi-rigid composite joints with steel beams and precast hollowcore slabs were carried out to determine the structural behaviour, especially the moment capacity and the rotation capacity of the connections. Different variables were chosen in each test, which including stud spacing, degree of the shear connections, amount of the longitudinal reinforcement and slab thickness. From each test, the moment-rotation relation curve was obtained and the structural behaviours of the connections were described.
In addition to the experimental investigations, 3-D finite element (FE) studies were also conducted to extend the scope of the experimental work. General purpose
package ABAQUS was used to develop the accurate 3 Dimensional model to simulate the behaviour of the composite connections with precast hollowcore slab. A 3-D finite element composite connection model was proposed. The finite element model was validated by comparing with the behaviour of the test results. Good agreement has
been obtained. The validated model was then used to perform the parametric study of the composite connections using precast hollowcore slabs with different variable
which including the beam size, column size, stud spacing, endplate thickness, column web thickness, steel beam
bottom flange thickness and slab thickness.
On the basis of the full scale tests and 3-D finite element parametric studies, the calculation method for the moment capacity and the rotation capacity of the connection was proposed and the structural behaviour of the composite connection using the precast hollowcore slabs was discussed in detail.