Cyclic response characteristics of retrofitted moment resisting connections

The effect of stiffeners on the strain patterns of the welded connection zone

“…Among the five moment resisting connections tested by Ghobadi et al [12], only one failed prematurely due to early fracture of the single fillet weld of the top flange. Two of the specimens failed due to lateral torsional buckling and fracture in the beam flange.…”

“…Following the AISC Seismic Provision [10] and the FEMA design capacity procedure [11], Ghobadi et al [12] performed five fullscale tests on the improved and retrofitted IB-BC connection specimens to investigate the effect of the weld size on the connection. These connections were fabricated in pairs in order to verify the cyclic response of the specimens.…”

“…In this study, the experimental results of RC3 and RC4 introduced by Ghobadi et al [12], and RC7 by Ghobadi et al [5] were used for the finite element verification. Fig.…”

“…A typical test setup presented by Ghobadi et al [5] and Ghobadi et al [12] is shown in Fig. 5 and a typical experimental specimen is presented in Fig.…”

Computational Benchmarks in Simulation of Cyclic Performance of Steel Connections using Three Dimensional Nonlinear Finite Element Method

“…The combined hardening plasticity model was used in order to model the material behavior during the cyclic loading. The parameters suggested by Kiamanesh et al [16] and Ghobadi et al [17] for combined strain hardening of Grade-50 hot-rolled steel was selected in the analysis algorithm. Isotropic hardening was used to model the material properties of the high strength steel bolts with material constitutive law as shown in Figure 9.…”