Seismic vulnerability and loading capacity of a wire strained bridge based on structural reliability

Authors

  • Edgar Muñoz Pontificia Universidad Javeriana, Colombia
  • Federico Núñez Pontificia Universidad Javeriana, Colombia
  • Jorge A. Rodríguez Rodríguez Pontificia Universidad Javeriana, Colombia
  • Alfonso Ramos Pontificia Universidad Javeriana, Colombia
  • Camilo Otálora Pontificia Universidad Javeriana, Colombia

DOI:

https://doi.org/10.4067/S0718-50732010000200006

Keywords:

Structural reliability, seismic vulnerability, wire strained bridges, local effects, monitoring, loading capacity, stress record and constructive process

Abstract

This document presents the analysis of seismic vulnerability and load capacity for Cesar Gaviria Trujilo Viaduct, by means of structural reliability techniques based on instrumentation works. Such study includes: geophysical trial tests, trials tests on material mechanical properties, environmental vibrations, measurements on the effects of traffic load, wireless instrumentation, loading tests, wire strainers tensile strength, etc. Additionally, the study explains structural models on finite elements, which were developed for the bridge, as well as its calibration process based on the loading test, and dynamical properties determined on experimental basis. Furthermore, the study indicates the way stress records collection of all structural elements was conducted, during the construction process, in accordance with the job site log-book. As for reliability, a seismic threat analysis was made as well as dynamic responses on the bridge site, where nine spectrums were obtained at different return periods. By studying strength probability curves and seismic loads of pylons, it was found they have reliability indexes in accordance with recommendations by the international regulations. However, one of the superstructure’s elements, which were introduced to evaluate its capacity on traffic effects, has a reliability index far higher than the ranges recommended by international regulations. Finally, some wire strainers have higher level tensions than specifications admitted during its design and international recommendations for these kinds of bridges.

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Published

2010-08-30

How to Cite

Muñoz, E., Núñez, F., Rodríguez, J. A. R., Ramos, A., & Otálora, C. (2010). Seismic vulnerability and loading capacity of a wire strained bridge based on structural reliability. Revista Ingeniería De Construcción, 25(2), 285–323. https://doi.org/10.4067/S0718-50732010000200006

Issue

Section

Original Research

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