Finite Element Model of the Pereira Dos Quebradras Cable Stayed Bridge

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Finite Element Model of the Pereira - Dos
QuebradrasCable Stayed Bridge

• Presented by LuTisha Brown
• Washington University REU
• August 1st 2003

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Overview

• Structural Health Monitoring
• Finite Element Models
• Pereira Dos Quebradras Bridge
• Progress
• Work Remaining
• Acknowledgments

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Structural Health Monitoring

• Seeks to monitor the levels of damage and
  deterioration within a structure
• Accomplishes this by using sensors placed
  throughout the structure

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Finite Element Models

• A specialized model for finite analysis
• Can accurately predict structural behavior
• Used for simulations

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Bridge Background

• Connects Pereira and Dos Quebradas
• On main Columbian route
• Currently monitored with sensors

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Towers

• Created using information from SAP2000 model
• Composed of nodes and three dimensional beam
  elements

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Deck

• Modeled as a central beam with lumped masses
  hanging from the center of the deck
• Created by dividing the deck into 25 C-shaped
  sections of similar mass
• Calculated translational, rotational masses and
  stiffnesses

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Deck
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Deck
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Cables

• Connected to the deck and towers with rigid links
• Cable element is modeled using a cable element

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Bridge Model

• Consists of 457 nodes, 191 beams, 72 cables, 230
  rigid links
• Has 1140 degrees of freedom

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Future Research

• Find the natural frequencies
• Calculate the mode shapes
• Compare to actual bridge for accuracy

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Acknowledgements

• Juan Caicedo, Washington Univeristy Graduate
  Student
• Dr. Shirley Dyke, advisor
• National Science Foundation

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Questions???