9 / 62
MAKALE
BETON PREFABRİKASYON
KASIM 2015
◆
SAYI : 116
9
Tek Yönlü ve Çevrimsel Yükler Etkisindeki
Önüretimli Elemanların Mafsallı Bağlantılarının
Kayma Davranışı
SHEAR RESISTANCE OF PINNED
CONNECTIONS OF PRECAST MEM-
BERS TO MONOTONIC AND CYCLİC
LOADING
ABSTRACT:
One of the major issues in the
design of precast structures against
earthquakes is the proper design of
their connections, mainly the beam-
to-column joints. Many different
types of such connections are used
worldwide, as monolithic, emulative
and dry pinned ones. The latter case
is the most common solution in
southern Europe and elsewhere for
single-storey or low-rise precast
buildings, and is the subject of the
experimental research reported in
this paper. The experiments were
performed at the Laboratory for
Earthquake Engineering of the National
Technical University of Athens, Greece
in the framework of the European FP7
project, SAFECAST. Precast beam
and column elements connected with
dowels were tested under monotonic
and cyclic, pure shear loading and
the research was focused on several
design aspects, as the shear ductility
Ioannis N. Psycharis1, Harris P. Mouzakis
School of Civil Engineering, National Technical University, Athens, Greece
Laboratory for Earthquake Engineering, National Technical University of Athens, 9, Heroon Polytechneiou Str.,
Zografos 15780, Athens, Greece
Bu makale,
Engineering Structures, Cilt 41, Sayfa 413–427 (2012)
’de yayımlanmıştır.
Makale, yazarlardan izin alındıktan sonra,
Doç.Dr. Ercan YÜKSEL, Araş.Gör. Cihan SOYDAN ve Araş.Gör. Ahmet GÜLLÜ
tarafından sadeleştirilerek Türkçe’ye çevrilmiştir.
1
Sorumlu Yazar: Laboratory for Eart-
hquake Engineering, National Technical
University of Athens, 9, Heroon Polyte-
chneiou Str., Zografos 15780, Athens,
Greece. Tel.: +30 2107721154; fax: +30
2107721182. E-mail address: ipsych@
central.ntua.gr(I.N. Psycharis).
capacity of the connections and the
effect of various parameters on their
strength. The parameters examined
include the diameter D of the dowels,
their number, their distances d and dn
from the edges in the longitudinal and
the transverse direction of the beam
respectively, and the strength of the
grout of their ducts. Improvements in
the design were also proposed and
tested experimentally. The results
show that, for small values of the ratio
d/D, the strength of the connection is
lower in the pull direction than that in
the push direction for both monotonic
and cyclic loading, due to the early
spalling of the cover concrete that
occurs. Compared to the strength for
monotonic loading, thecyclic response
shows significantly lower resistance,
less than half the monotonic one.
The results for cyclic loading also
show that significant values of shear
ductility can be achieved by dry pinned
joints, provided that the concrete
cover of the dowels has sufficient
thickness. Comparisons between
the experimental results obtained
for various design parameters show
that secondary effects related to the
number of the dowels can occur for
large forces during monotonic loading,
but are less important for cyclic
response. A formula is proposed for
the calculation of the shear strength
of pinned connections, which can be
used in seismic design.
2012 Elsevier Ltd. All rights reserved.
ÖZET VE GİRİŞ
Önüretimli betonarme yapı sistem-
lerinin tasarımında en önemli konu-
lardan biri kolon-kiriş birleşimlerinin
tasarımıdır. Uygulamada tek döküm,
ıslak, kuru vb. tür birleşimler kullanıl-
maktadır. Güney Avrupa ülkelerinde
tek katlı ve az katlı yapı sistemlerinde
sıklıkla kullanılan mafsallı birleşimlerin
pimle oluşturulan türünün kayma dav-
ranışı bu makalede incelenmiştir. De-