CYCLIC PERFORMANCE OF STEEL BEAM-COLUMN MOMENT JOINTS

The performance of ten seismic beam-to-column moment connection specim ens using bolted web-welded flanges (BWWF) detail is critically assess ed. Key parameters include: beam flange to entire section plastic modu lus ratio, Z(F)/Z, supplemental web bolts, supplemental web welds and column panel zone strength. It was found that the cyclic plastic rotat ional capacities of the BWWF connections ranged between 0.009 and 0.01 8 rad, and did not indicate apparent relationships with respect to the beam section modulus ratios. The ultimate beam flange flexural streng th, Z(F)F(u), well predicted the ultimate moment capacities of BWWF co nnections. Using the proposed strength criterion, the supplemental web welds, but not the supplemental web bolts, significantly enhance the strength, ductility and energy absorbing capacity of the BWWF connecti ons.