TY - GEN
T1 - Design and Performance of Combined Basic Devices to Control Undesirable Bridge Deck Displacements and Damage, During Major Earthquakes
AU - Romo, M.
AU - Morales, E.
AU - Hidalgo, G.
AU - Almeida, J.
AU - Puebla, R.
AU - O’Connor, J.
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2022
Y1 - 2022
N2 - This paper describes criteria and parameters employed in the design of neoprene shock absorbers, concrete shear keys and vertical steel bar anchors, used together in the Los Caras Bridge, to control damage and bridge deck displacements, during major earthquakes. There is a focus on construction details, because of the importance of this factor on overall system performance. The authors assess and report on the actual performance of these design features under the April 16, 2016 Mw 7.8 Muisne earthquake in Manabí, Ecuador. Isolated and non-isolated segments of the 2 km long Los Caras Bridge remained fully operable after a peak ground acceleration (PGA) of 0.90 g was generated by the Muisne earthquake. Neoprene compression shock absorbers were used at the end of bridge segments. Transverse reinforced concrete shear keys and vertical steel bar anchors were included on top of piers. The shear resistance of neoprene bearing pads is also analyzed. Special attention was paid to performance of the neoprene bearing pads, since their stability is essential to the whole displacement control system. Displacement control of shear keys, and bridge deck displacements in other bridges of Manabí were also studied. After the earthquake, general details and design criteria are proposed. Improved design criteria and details for concrete shear keys and steel bar anchors, based on actual seismic performance, are presented.
AB - This paper describes criteria and parameters employed in the design of neoprene shock absorbers, concrete shear keys and vertical steel bar anchors, used together in the Los Caras Bridge, to control damage and bridge deck displacements, during major earthquakes. There is a focus on construction details, because of the importance of this factor on overall system performance. The authors assess and report on the actual performance of these design features under the April 16, 2016 Mw 7.8 Muisne earthquake in Manabí, Ecuador. Isolated and non-isolated segments of the 2 km long Los Caras Bridge remained fully operable after a peak ground acceleration (PGA) of 0.90 g was generated by the Muisne earthquake. Neoprene compression shock absorbers were used at the end of bridge segments. Transverse reinforced concrete shear keys and vertical steel bar anchors were included on top of piers. The shear resistance of neoprene bearing pads is also analyzed. Special attention was paid to performance of the neoprene bearing pads, since their stability is essential to the whole displacement control system. Displacement control of shear keys, and bridge deck displacements in other bridges of Manabí were also studied. After the earthquake, general details and design criteria are proposed. Improved design criteria and details for concrete shear keys and steel bar anchors, based on actual seismic performance, are presented.
KW - Concrete shear keys
KW - Neoprene shock absorbers
KW - Steel bar anchors
UR - https://www.scopus.com/pages/publications/85135060801
U2 - 10.1007/978-3-031-08288-7_5
DO - 10.1007/978-3-031-08288-7_5
M3 - Conference contribution
AN - SCOPUS:85135060801
SN - 9783031082870
T3 - Lecture Notes in Electrical Engineering
SP - 61
EP - 76
BT - Recent Advances in Electrical Engineering, Electronics and Energy - Proceedings of the CIT 2021, Volume 2
A2 - Botto-Tobar, Miguel
A2 - Cruz, Henry
A2 - Diaz Cadena, Angela
PB - Springer Science and Business Media Deutschland GmbH
T2 - 16th Multidisciplinary International Congress on Science and Technology , CIT 2021
Y2 - 14 June 2021 through 18 June 2021
ER -