Abstract
Investigated is the mechanical behavior of beam-to-column connections with bolted Tstubs. The objective of this study is to establish the design guide to beam-to-column connections with split-tee joints. Experiments of beam-to-column connections with various joint surface conditions are carried out, in order to obtain qualitative and quantitative effects of joint surface conditions on the mechanical behavior of the beam-to-column connections. It is revealed that the mechanical behavior is greatly influenced by the joint surface conditions, and that angular welding distortion and curve welding distortion work advantageously in the mechanical view point when the distortions are convex-wise.