Bibliographic citations
Huillca, G., Ñahui, H. (2023). Diseño de aislador elastomérico con núcleo de plomo (LRB) para el puente vehicular Moyocc ubicado en el departamento de Ayacucho [Trabajo de Suficiencia Profesional, Universidad Peruana de Ciencias Aplicadas (UPC)]. http://hdl.handle.net/10757/671096
Huillca, G., Ñahui, H. Diseño de aislador elastomérico con núcleo de plomo (LRB) para el puente vehicular Moyocc ubicado en el departamento de Ayacucho [Trabajo de Suficiencia Profesional]. PE: Universidad Peruana de Ciencias Aplicadas (UPC); 2023. http://hdl.handle.net/10757/671096
@misc{renati/411651,
title = "Diseño de aislador elastomérico con núcleo de plomo (LRB) para el puente vehicular Moyocc ubicado en el departamento de Ayacucho",
author = "Ñahui Perez, Huber Estif",
publisher = "Universidad Peruana de Ciencias Aplicadas (UPC)",
year = "2023"
}
In this research work, the seismic design of an elastomeric isolator with lead core (LRB) for the Moyocc bridge located in the department of Ayacucho was carried out, which consisted of determining the mechanical and geometrical properties of the isolator. The Moyocc bridge is of mixed type, consisting of two spans of 46 m each, made up of full web steel beams braced with diaphragm beams and a reinforced concrete deck of f'c=280 Kg/cm2. The design was carried out under the requirements of the AASHTO-LRFD and the AASHTO Seismic Isolation Design Specification Guide (fourth edition). The pre-dimensioning and feasibility of the LRB seismic isolator was performed using the simplified elastic method. Design validation was performed by means of spectral modal analysis and time-history analysis of the bridge superstructure, the latter using the seismic acceleration of the Pisco earthquake (August 15, 2007) scaled to the design spectrum. CSI BRIDGE V25 software was used. With the incorporation of the LRB-500-SM-105/80 isolator at the base of the superstructure, the effective period of vibration of the superstructure has been increased from 0.485 sec to 1.652 sec and with it a reduction of the seismic shear at the base of the abutment by 82.28%, compared to the conventional model (movable supports on the abutments and fixed supports on the abutment). The reduction of the seismic force on the abutment is also due to the increase of the effective damping of the bridge from 5.00% to 25.00% due to the incorporation of the seismic isolator. The LRB-500-SM-105/80 isolator complies with the service and seismic stresses, as well as with the stability checks due to lateral and vertical loads. The Moyocc bridge (superstructure) will be able to withstand seismic events of great magnitude, similar to the Pisco earthquake of 2007, and its integrity and operability will not be affected with the incorporation of the LRB-500-SM-105/80 isolator.
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