Abstract
Beam-column-joints (BCJ) in reinforced concrete (RC) frames are known to be critical against seismic actions. Hence, several researchers have conducted related investigations. The loading history used in the experimental investigations must be a sufficiently accurate and conservative representation of seismic loading on the structure and should trigger all possible critical failure mechanisms in the subassembly. Presently, there is significant diversity in the loading histories used for seismic investigation of structural subassemblies. This paper intends to propose an optimum loading history for considering bidirectional (horizontal) seismic action on 3D-RC BCJ subassemblies. To this end, the available loading histories (unidirectional and bidirectional) for simulation of seismic loads on RC joint subassemblies are reviewed in the context of the demands they impose on the joints. Finite element modeling and analyses are used as a tool for investigating the response of 3D-BCJ subassembly under different bidirectional loading states.
Highlights
Seismic Testing of 3D Frame Joints.Reliable assessment of the capacity of a structural system is crucial for its performance evaluation and design
FE analyses were used as a tool to investigate loading protocol as a parameter for 3D beam–column joints subjected to bidirectional loading
The objective of this paper was to investigate the influence of different kinds of loading protocols on the seismic behavior of 3D beam–column joints and to arrive at a
Summary
The resulting of loading protocol is crucial for effective communication between the loaders [3] (those cyclic load–displacement characteristics are analyzed for the stiffness and damping at the involved with defining the point loads atexpressed structural frame level)level, and the jointers [3] ProThe seismic demand on the structure is a is function of the stiffness and tocol for a bidirectionally loaded BCJ required to evaluated translate structural the bidirectional seismic acdamping In this context of seismic considerations, it can be emphasized that the definition tion at the structural-frame level onto the sub-assembly level so that the evaluated strucof loading protocol isat crucial for effective communication between theactions loadersbeing [3] (those tural characteristics the subassembly levels correspond to the considered involved with defining the point loads at structural frame level) and jointers [3].
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