Numerical assessment of the influence of different joint hysteretic models over the seismic behaviour of Moment Resisting Steel Frames

3rd International Conference on Innovative Materials, Structures and Technologies

Giordano, V.^1 ; Chisari, C.^2 ; Rizzano, G.^3 ; Latour, M.^1

Master Student, University of Salerno, Fisciano, Italy^1

Full Professor, University of Salerno, Fisciano, Italy^2

Post-doc, University of Salerno, Fisciano, Italy^3

关键词: Beam-to-column connections;    Elastic -plastic models;    Incremental dynamic analysis;    Moment-resisting steel frames;    Numerical approaches;    Parametric -analysis;    Seismic excitations;    Seismic Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012102/pdf
DOI  :  10.1088/1757-899X/251/1/012102

来源: IOP

【 摘 要 】

The main aim of this work is to understand how the prediction of the seismic performance of moment-resisting (MR) steel frames depends on the modelling of their dissipative zones when the structure geometry (number of stories and bays) and seismic excitation source vary. In particular, a parametric analysis involving 4 frames was carried out, and, for each one, the full-strength beam-To-column connections were modelled according to 4 numerical approaches with different degrees of sophistication (Smooth Hysteretic Model, Bouc-Wen, Hysteretic and simple Elastic-Plastic models). Subsequently, Incremental Dynamic Analyses (IDA) were performed by considering two different earthquakes (Spitak and Kobe). The preliminary results collected so far pointed out that the influence of the joint modelling on the overall frame response is negligible up to interstorey drift ratio values equal to those conservatively assumed by the codes to define conventional collapse (0.03 rad). Conversely, if more realistic ultimate interstorey drift values are considered for the q-factor evaluation, the influence of joint modelling can be significant, and thus may require accurate modelling of its cyclic behavior.