SINGLE-PLATE FRAMING CONNECTIONS WITH GRADE-50 STEEL AND COMPOSITE CONSTRUCTION.

Abstract

Unshored construction has two offsetting effects on connection moment. Part of the load is supported by the bare steel alone which moves the beam line out on the phi axis and increases the moment. On the other hand, the first yield load drops, which lowers the beam line on the ordinate and decreases the moment. Either of these phenomena can dominate. It is not possible to conclude unshored construction will always result in more or less connection moment than that for shored construction. however, the results of over 2,000 BEAMLINE analyses indicate the two construction techniques result in modest differences in connection moment and that the basic design curve still gives satisfactory results (Ref. 1). On the basis of studies conducted during this research, it is recommended the same design procedure be used for both shored and unshored construction.