Experimental and numerical study of a proposed moment-resisting connection for precast concrete frames

Document Type : Article

Authors

1 Department of Civil Engineering, Razi University, Kermanshah, Iran

2 Department of Civil Engineering, Razi University, Kermanshah, Iran

Abstract

This paper presents the test results of a proposed ductile moment-resisting beam-column connection for precast concrete frames and a developed3D nonlinear finite element model of this connection in several different details of connection, to predict its behavior under cyclic loading, based on the loading of the ACI T1.1-01. In this connection, precast concrete beam and column are connected to each other by steel linkage element. This method is able to create concrete structures with higher quality through minimizing in-situ concreting and maximizing the speed of construction as well as usage of ductile and exchangeable elements in sensible locations of the connection. Two types of bolted and welded connections were compared to monolithic connection in terms of stiffness, strength, energy dissipation capacity and ductility factor. All specimens satisfied all criteria of ACI T1.1-01.To investigate the behavior of these connections a 3D nonlinear finite element model has been simulated. Numerical results showed a good agreementwith experimental results. The initial stiffness of monolithic connectionspecimen wasgreater thanboltedconnection and welded connectionspecimens.Even though, the beam moment capacity factors for two welded and bolted samples were a little more than monolithic sample; but the ductility factors of these samples were a little less than that of monolithic sample.

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Biographies
Mojtaba Fathi was born in Kermanshah. He received
his BS degree from Tehran University and his MS
and PhD degrees from Tarbiat Modares University of
Tehran in 1997 and 2004, respectively. At present, he
works as an Assistant Professor at the Department of
Civil Engineering in Razi University.
Mahdi Parvizi was born in Kermanshah. At the
moment, he is a PhD student of Structural Civil
Engineering at Razi university. He obtained his BS
degree from Jondi Shapoor University of Dezfool in
2010, and his MS degree from Amir Kabir University
in 2012.
Javad Karimi obtained his BS degree in Civil Engineering
from University of Tabriz in 2014; then, he
received his MS degree in Structural Civil Engineering
from Razi University in 2016. His thesis eld concerns
the modelling of precast concrete connection failure.
He enjoys
uency in programming (Matlab), analysis
program (Abaqus), design programs in the elds of
structural design, the architecture, such as Auto-
Cad*3d-Max*civil-3d*safe*SAP*Etabs. In addition,
he is
uent in English and holds a degree in International
TOEFL. He is a design engineer, supervisor, and
enforcer in the Engineering Organization of Hamedan
province.
Mohammad Hossein Afreidoun was born in Kermanshah.
At the moment, he is a PhD student of
Structural Civil Engineering at Razi University. He
obtained his BS and MS degrees in Structural Civil
Engineering from Islamic Azad University of Kermanshah
and Razi University of Kermanshah, respectively,
in 2008 and 2013.