Finite Element Modeling of Precast R.C.C. Joints and Frame Under Cyclic Loading

Abstract

Precast concrete has been widely accepted as a viable means of constructing safe, durable, reliable, high quality, and cost-effective structural systems. Its full implementation in high seismic areas, however, has been some what limited, mainly due to scarce design guidelines as compared to those available for cast-in-place concrete structures. In particular, there is a lack of design provisions for seismic-resistant beam-to-column connections appropriate for precast concrete frame construction. Another obstacle to the use of precast concrete construction in seismic areas has been the imposition of prescriptive provisions developed to promote ductility in cast-in-place concrete construction. This set of design and detailing requirements makes a standard methodology for establishing equivalence of energy dissipation and ductility between precast concrete and cast-in-place systems desirable. In the past, some precast concrete framed structures have performed poorly in earthquakes because of inadequate connection details. To gain confidence in the use of precast concrete in moment-resisting frames, satisfactory methods for connecting the precast elements together were required. As has been recognized, the challenge in precast frame construction lies in finding economical and practical methods of connecting the precast concrete elements together to ensure adequate stiffness, strength, ductility and stability. A number of experimental research programs conducted in recent years have significantly improved our understanding of the behavior of connections between precast concrete element. This study presented a comprehensive literature overview of the findings from studies conducted to analyze and investigate the behavior of precast concrete systems assembled with typical connections or joints under simulated earthquake loading.