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| dc.description.sponsorship | A ductile reinforced concrete structure shall be
designed to ensure that plastic hinges occur as many as possible
before collapse. This paper investigates the effect of column to
beam strength ratio on performance of ductile reinforced
concrete buildings. Fourteen interior frame models of two
building categories which are five and ten stories buildings were
modeled and analyzed. The main parameter among those models
is column to beam strength ratio of 1.0 to 2.0 which are 1.0, 1.2,
1.4, 1.6, 1.8, and 2.0. The values are the ratio between column
nominal strength (ΣMnc) and beam nominal strength (ΣMnb). In
this study, the ratio between column strength to beam probable
strength (ΣMprb) of 1.2 is also investigated. A static nonlinear
pushover analysis was used to evaluate the performances of all
models. Analysis results show that all models have a life safety
performance level. A collapse mechanism of beam sway
mechanism was achieved for strength ratios of 1.4 to 2.0 for five
story frame models and 1.6 to 2.0 for ten story frames. The
increase in the strength ratio up to 1.4 can increase ductility
factor significantly, however, beyond that the strength ratio does
not affect the ductility both for five and ten story frame models.
Considering the ratio between column strength to beam probable
strength of 1.2, the ductility factor increases by 16% and 25%
respectively for five and ten stories, however, both frames still
have performance level of life safety and collapse mechanism of
column sway mechanism. | en_US |
