Title:
Seismic Performance of PC Wide Beam-Column Connections under Ductile Connection Principle (Prepublished)
Author(s):
Wei Zhang, Deuckhang Lee, Seonhoon Kim, and Dichuan Zhang
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
precast concrete; wide beam; beam-column connection; energy dissipation; equivalent viscous damping; macro modeling
DOI:
10.14359/51744399
Date:
12/6/2024
Abstract:
To secure emulative seismic performances of precast concrete (PC) special moment frame buildings, two capacity-based connection design options (i.e., strong and ductile precast connections) are provided in the current ACI 318 code. However, the evolving performance-based seismic design and response evaluation requires a reasonable estimation of the energy dissipation and corresponding hysteresis damping characteristics so that their potential performance level can be properly predicted. Therefore, this study focuses on the seismic performances, especially the energy dissipation and damping performances of the code-compliant PC wide beam-column connections. Three PC-wide beam-column connection specimens under the ductile connection design principle with different joint details and an RC control specimen were fabricated and tested under reversed cyclic loadings. In addition, an energy-based macro modeling method was developed to characterize the cyclic responses including the damping response of PC wide beam-column connections. The test results revealed that code-required overstrength of shear friction strength between PC beam members and cast-in-place (CIP) concrete is crucial to achieving the ductile performance of precast connections. It also appeared that the energy-based macro modeling method can well capture the hysteresis features through the relationship between equivalent viscous damping (EVD) ratio and ductility capacity of PC-wide beam-column connections.