Behavior Of Bare And Masonry Infilled
R/C Frames Under Cyclic Loading:
Experiments And Analysis
Author(s)
Ch. G. Karayannis, D. J. Kakaletsis & M. J. Favvata
Abstract
In this study an analytical investigation and experimental verification of the
influence of infill panels on the seismic behavior of reinforced concrete frames is
presented. The project includes three 1/3-scale, single-story, single-bay
reinforced concrete frame specimens subjected to lateral cyclic loading; one
infilled frame specimen with clay brick solid masonry and two bare frame
specimens one with transverse steel in the form of common stirrups and one with
continuous rectangular spirals of the same spacing. Special elements are
employed for the modeling of the examined specimens. Beam and columns were
modeled using elements with distributed plasticity. For the contribution of the
behavior of the infill to the response of the frame the equivalent diagonal strut
model is used. Two different types of elements were employed for this purpose.
The first element is an inelastic truss element with bilinear brittle response. The
second one is an inelastic element with response that can include degrading
branch. The actual properties of the infill and henceforth the characteristics
needed for the diagonal strut model were determined using the experimental
results. Comparisons of the experimental results with the analytical predictions
are presented and commented. The use of the element with degrading branch for
the equivalent strut model yielded the most satisfactory results.
Keywords: infilled R/C frames, masonry infills, experimental results, analytical
modelling.
1 Introduction
Masonry infills are frequently used in R/C frame structures, in the form of
interior or exterior partition walls. For the influence of infill panels on structural
Keywords
infilled R/C frames, masonry infills, experimental results, analyticalmodelling.
Related Book
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