Abstract
Structural behaviors of connections, which were reinforced by vertical steel plate crossing ribs and the corner weld of columns were partial penetration weld, composed of concrete filled square tubular steel column and steel H-beam have been studied by cruciform tensile test and beam-and-column subassemblages subjected to earthquake type loading. Stable and ductile hysteresis loops have been obtained in the subassemblage test results. The estimated yield and ultimate strengths of the connections by yield line theory show approximate agreement with test results. And yield shear capacity of the joint panel is fairly predicted by considering simple stress transfer mechanism.
