Numerical And Experimental Study Of Seismic
Retrofitting For One-bay Single-storey Reinforced
Concrete (R/C) Frames With An Encased
R/C Panel
Author(s)
G. C. Manos, V. Soulis, K. Katakalos & G. Koidis
Abstract
The in-plane behaviour of one-bay single-storey reinforced concrete (R/C)
frames, retrofitted by jacketing of their columns together with a cast-in-place
encased R/C panel, was studied numerically when subjected to cyclic seismictype
horizontal loading. The influence of such an encased R/C panel is
examined, when the panel is connected with the surrounding frame with or without
steel ties. From the preliminary numerical results it is concluded that an
encased panel results in a considerable increase of the stiffness and the bearing
capacity of such a system, especially when steel ties are present at the interface.
The placement of steel ties moderates the amplitude of the forces that are
transferred at the narrow column-to-beam joint regions in a direction normal to
the interface through the contact/gap mechanism, and consequently, mitigates the
possibility of crushing the encased panel and/or parts of the columns or beams at
these regions. Thus, it can be concluded that the encased R/C panel connected by
the appropriate steel ties with the surrounding R/C frame, has a beneficial effect
on the seismic behaviour of this type of structural system. Experiments were
performed in order to quantify the behaviour of such steel tie connections at the
interface under a stress field that is expected to develop at this part of the
encasement during seismic type loading. Such measured behaviour is in
agreement with the assumptions made concerning the behavioural characteristics
of these steel ties in the preliminary numerical analysis
Keywords: retrofitting, reinforced concrete frames, encasement R/C panels,
jacketing, soft ground floor.
Keywords
Keywords: retrofitting, reinforced concrete frames, encasement R/C panels,
jacketing, soft ground floor.
Related Book
Other papers in this volume
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