Study on mechanical behavior and optimization of prefabricated square column H-beam outer-shell joint

Analysis on Fracture Behavior and Optimization of Beam‐Column Connections with Expanded Flanges of Steel Frames

“…e constitutive relation diagram of steel Q235B and weld E4315, which adopt threefold line models, is shown in Figure 2. e material parameters of steel and weld are obtained through material testing [17,23]: f y � 287.3 N/mm 2 , ε y � 0.14%, EQ235 � 2.06 × 105 N/mm, f u � 393.1 N/mm 2 , ε u � 11.7%, f st � 348.11 N/mm 2 , ε st � 18.47%, and v � 0.3; f y � 330 N/mm 2 , ε y � 0.16%, EE4315 � 2.05 × 105 N/mm, f u � 420 N/mm 2 , ε u � 22%, and v � 0.3, respectively. In the numerical simulation model, the geometric nonlinearity, the material nonlinearity, and the Bauschinger effect [24] are taken into consideration, but the effects of the welding defects and welding residual stresses in the beamcolumn connections are not considered because of a shortage of test data.…”

“…e preselected reducing region on the beam can quickly enter the plastic state in order to achieve moving out plastic hinge. However, the studies on beamcolumn connections with reinforced beam flanges are relatively less (Lu et al [13], Wang et al [14], Yang and Chen [15], Wang et al [16], Tian et al [17], and Ma et al [18]), which was adopted by the Chinese code [19]. In addition, most of them were focused on the mechanical performance of the connections themselves without considering the effects of different sizes of reinforced beam flange on the fracture properties of the connections.…”

Experimental and Numerical Study of Mechanical Properties for the Double-Ribbed Reinforced Beam-Column Connection

“…Over the years, numerous studies on the mechanical performance of steel beam-column connections with reduced beam sections have been carried out in the references [7][8][9][10][11][12][13][14]. In comparison, relatively few studies [15][16][17][18][19][20][21] on the mechanical properties of beam-column connections with the reinforcement of steel frames have been performed, and there are especially few results concerning double-ribbed reinforced beam-column connections. Besides, those studies mainly focused on the mechanical performance of the connections themselves without considering the difference in rib size, which may affect the fracture behavior of the connections.…”