Abstract
This chapter examines the effects of loading conditions on behavior of semirigid beam-to-column composite connections. Four specimens (SPFM1, SPPM2, SPMM3, and SPMM4) were constructed and tested. Connection types of flush endplate and partial depth endplate were selected, where “L” and “R” denote the left and right connections respectively. All the test specimens comprised two 305x127UB37 steel beams. The rigid body and bars were connected by a continuum of nonlinear distributed springs in axial compression or tension to simulate the behavior of connection components. Four types of elements were used to represent the connection components, including elements corresponding to beam flanges and beam webs with endplates attached, elements of reinforcement, and elements of concrete slab. The flush endplate connections achieve higher resistance than partial depth endplate connections. The specimens achieved good agreement between the experimental and theoretical results, at least up to the maximum moment levels.
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