Huang, Qunxian

Reinforced Concrete Exterior Wide Beam-Column Joints Under Earthquake-Type Loading

Abstract eng:
The seismic behaviour of reinforced concrete (RC) exterior wide and conventional beam-column joints was investigated through experimental and computational simulation. Two full-scale specimens were designed, constructed and tested under reversed quasi-static cyclic loading. Specimens had the beam-width to column-width ratios of 1 and 1.5, representing the conventional and wide beam-column connections and were designed in conformance with ACI 318-14 and ACI 352-R02. Seismic performance of the connections was evaluated based on the results obtained from the experiments, such as crack pattern, hysteresis response, ductility ratio, and the strain profiles of the longitudinal and transverse reinforcement of specimens. The results indicated that both specimens were capable of supporting the complete formation of beam plastic hinges with no major cracks in the joint region. Both specimens attained their negative and positive design strengths at a drift level of 1.1%. Computer simulations with a 3D nonlinear finite element model (FEM) using ABAQUS were carried out. Two sets of results from the experiment and computer simulation were compared, and good agreement was found. The calibrated FEM was then used to investigate the role of the transverse reinforcement in the joint region. Experimental and numerical verification showed that both conventional and wide beam-column joints designed with the current design procedure recommended in ACI can perform well in carrying the horizontal lateral loads. A parametric study using FEM indicated that minimum amount of the joint transverse reinforcement recommended by ACI code is an acceptable limit in both conventional and wide beam-column joint. Providing additional joint transverse reinforcement will not increase the joint shear strength, but it causes difficulties in construction of the wide beam-column connections.

Contributors:

Behnam, Hamdolah

Conference Title:

Proceedings of the 16th World Conference on Earthquake Engineering

Conference Title:

16th World Conference on Earthquake Engineering

Conference Venue:

Santiago (CL)

Conference Dates:

2017-01-09 / 2017-01-13

Rights:

Text je chráněný podle autorského zákona č. 121/2000 Sb.