Abstract. This paper presents the test results of a proposed ductile moment-resisting beam-column connection for precast concrete frames and a developed 3D nonlinear niteelement model of this connection featuring several di erent details to predict its behavior under cyclic loading based on the loading of 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 of higher quality by minimizing in-situ concreting, maximizing the speed of construction, and using ductile and exchangeable elements in sensible locations of the connection. Two types of bolted and welded connections were compared with the monolithic connection in terms of sti ness, strength, energy dissipation capacity, and ductility factor. All specimens satis ed all criteria of ACI T1.1-01. To investigate the behavior of these connections, a 3D nonlinear nite-element model was simulated. Numerical results showed good agreement with experimental results. The initial sti ness of monolithic connection specimen was greater than that of bolted connection and welded connection specimens. Even though the beam's moment capacity of the two welded and bolted samples was slightly more than that of monolithic sample, the ductility factors in these samples were slightly less than those in monolithic sample.
This paper presents the results of experimental and numerical study on a proposed exterior semi-precast moment-resisting concrete connection. Steel linkage element connects precast concrete beam to column in two cases of bolted and welded connections. These connections were compared to monolithic connection based on stiffness, strength, energy dissipation capacity and ductility factor. An accurate 3D nonlinear finite element model has been simulated to study the behavior of these connections. A good agreement was observed between numerical results and experimental ones in behavior and damage mode. Although, all samples satisfied all the code criteria, but the trend of failure in bolted and welded connection was observed on the weld and bolts area, at the connection zone between beam and steel linkage. However, in monolithic connection, the yielding was observed in rebars and crushing of concrete at the end of beam. The initial stiffness of bolted and welded connection specimen was less than that of monolithic connection specimen. But, the beam moment capacity factors of these samples were a little more than monolithic sample; so, the ductility factors of them were a little less than that of monolithic sample.
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