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detail was developed and tested. Review of some connection 1.4 Summary of Experimental
details resulted in recommended details that were ready for Specimens
implementation for limited ductility connection applications.
These limited ductility details were the grouted duct connection, During the course of this research program, a number of
grouted sleeve coupler connection, and partially precast promising precast bent cap details were investigated through
shell connection. The proposed connections for testing and experimental testing. These specimens were developed to meet
validation were presented as well as a rigorous experimental a variety of performance objectives for sites located throughout
and analytical program for performing the required validation U.S. seismic regions. A summary of these specimens is provided
studies. in Table 1.1.
Table 1.1. Summary of experimental specimens.
Code Specimen Name Specimen Specimen Purpose
Type
CIP Cast-in-place Beam-to- Control specimen detailed in accordance
control specimen column with Recommended LRFD Guidelines for
emulative the Seismic Design of Highway Bridges
(2) for high seismic applications.
GD Grouted duct Beam-to- Grouted duct specimen designed to
specimen column provide high ductility response with
emulative similar response to CIP specimen.
CPFD Cap pocket full Beam-to- Cap pocket specimen designed to provide
ductility column high ductility response with similar
specimen emulative response to CIP specimen. Detail uses a
corrugated metal pipe to provide stay-in-
place form and joint shear reinforcement.
CPLD Cap pocket Beam-to- Cap pocket specimen design with
limited ductility column alleviated seismic detailing intended to
specimen emulative provide limited ductility for regions of
low to moderate seismicity. Detail uses
similar corrugated metal pipe detail to
CPFD.
HYB1 Conventional Beam-to- Hybrid specimen detailed with
hybrid specimen column conventional spiral confinement
hybrid reinforcement and full-length mild
reinforcement. Detail is intended to be a
hybrid detail most similar to traditional
CIP construction.
HYB2 Concrete filled Beam-to- Hybrid specimen using full length steel
pipe hybrid column shell acting as confinement and shear
specimen hybrid reinforcement. Mild reinforcement used
only at joint to provide energy
dissipation and terminated into the
column.
HYB3 Dual steel shell Beam-to- Hybrid specimen using two full length
hybrid specimen column shells (outer steel and inner corrugated
hybrid metal pipe) acting as confinement and
shear reinforcement. Mild reinforcement
utilized only at joint. Dual shell detail
intended to reduce weight of column
section for precasting.
INT Post-tensioned Girder-to- Integral specimen using precast post-
integral specimen beam tensioned girders spliced through the
emulative precast bent cap. Girders are
discontinuous at bent cap leaving a cold
joint between the members. Intended to
provide a constructible precast option for
high seismic regions requiring integral
response.
