TY - GEN
T1 - Analytical study assessment of a bridge with pretensioned rocking columns for rapid construction
AU - Mantawy, Islam M.
AU - Thonstad, Travis
AU - Sanders, David H.
AU - Stanton, John F.
AU - Eberhard, Marc O.
N1 - Funding Information:
This research was supported by the National Science Foundation through George Brown Network for Earthquake Engineering Systems Research Program (Award #1207903).
Publisher Copyright:
© 2018 Ingenta.
PY - 2017
Y1 - 2017
N2 - A two-span, quarter-scale, precast concrete bridge with pretensioned rocking columns was tested on the shaking tables at the University of Nevada, Reno in 2014. The columns were designed with partially unbonded strands to provide re-centering; locally debonded reinforcing steel to delay bar fracture; and confining steel tubes at their ends to protect the concrete against spalling. The residual drift ratios in the bridge were never larger than 0.4%, even after peak drift ratios more than 12%. The only major damage observed during testing was the fracture of the deformed bar reinforcement, first occurring at a drift ratio of 5.7%. To investigate methods to delay bar fracture in this bridge, analytical models were developed and calibrated using the experimental results. These models suggest that low-cycle fatigue likely caused reinforcement fracture in the tests and fracture could be delayed by using a longer debonded length of the reinforcement.
AB - A two-span, quarter-scale, precast concrete bridge with pretensioned rocking columns was tested on the shaking tables at the University of Nevada, Reno in 2014. The columns were designed with partially unbonded strands to provide re-centering; locally debonded reinforcing steel to delay bar fracture; and confining steel tubes at their ends to protect the concrete against spalling. The residual drift ratios in the bridge were never larger than 0.4%, even after peak drift ratios more than 12%. The only major damage observed during testing was the fracture of the deformed bar reinforcement, first occurring at a drift ratio of 5.7%. To investigate methods to delay bar fracture in this bridge, analytical models were developed and calibrated using the experimental results. These models suggest that low-cycle fatigue likely caused reinforcement fracture in the tests and fracture could be delayed by using a longer debonded length of the reinforcement.
UR - http://www.scopus.com/inward/record.url?scp=85050010280&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050010280&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85050010280
T3 - IABSE Conference, Vancouver 2017: Engineering the Future - Report
SP - 1903
EP - 1910
BT - IABSE Conference, Vancouver 2017
PB - International Association for Bridge and Structural Engineering (IABSE)
T2 - 39th IABSE Symposium in Vancouver 2017: Engineering the Future
Y2 - 21 September 2017 through 23 September 2017
ER -