A. Filiatrault et al., SEISMIC PERFORMANCE OF DUCTILE AND NOMINALLY DUCTILE REINFORCED-CONCRETE MOMENT-RESISTING FRAMES - II - ANALYTICAL STUDY, Canadian journal of civil engineering (Print), 25(2), 1998, pp. 342-352
This paper is the second of two companion papers on the evaluation of
the level of protection offered by ductile and nominally ductile reinf
orced concrete structures. In the first paper, experimental results ob
tained from shake table tests of two half-scale reinforced concrete mo
ment resisting frames were reported. The first structure was designed
as a ductile frame (force reduction factor R = 4) according to current
Canadian standards; and the second structure incorporated only nomina
lly ductile details (R = 2). This second paper deals with the dynamic
modelling of the two structures. A simple nonlinear time-history dynam
ic analysis model is presented and its predictions are compared with t
he shake table test results. It is shown that inelastic deformations i
n beam-column joints have a major influence on the seismic response of
the structures. Approximate modelling of these joint deformations, ba
sed on equivalent rotational springs, can provide a good correlation b
etween numerical and experimental results.