Finite Element model updating of a skewed highway bridge using a multi-variable sensitivity-based optimization approach

Amir A. Mosavi; Hassan Sedarat; Sean M. O'Connor; Abbas Emami-Naeini; Vince Jacob; Alex Krimotat; Jerome Lynch

doi:10.1117/12.916163

4 April 2012 Finite Element model updating of a skewed highway bridge using a multi-variable sensitivity-based optimization approach

Amir A. Mosavi, Hassan Sedarat, Sean M. O'Connor, Abbas Emami-Naeini, Vince Jacob, Alex Krimotat, Jerome Lynch

Author Affiliations +

Proceedings Volume 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012; 834727 (2012) https://doi.org/10.1117/12.916163
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

This paper presents the implementation of the Finite Element (FE) model updating for a skewed highway bridge using real-time sensor data. The bridge under investigation is a I-275 crossing in Wayne County, Michigan. The bridge is instrumented with a wireless sensory system to collect the vibration response of the bridge under ambient vibrations. The dynamic characteristics of the bridge have been studied through the field measurements as well as a high-fidelity FE model of the bridge. The developed finite element model of the bridge is updated with the field measured response of the bridge so that the FE computed and field measured modal characteristics of the bridge match each other closely. A comprehensive sensitivity analysis was performed to determine the structural parameters of the FE model which affect the modal frequencies and modal shapes the most. A multivariable sensitivity-based objective function is constructed to minimize the error between the experimentally measured and the FE predicted modal characteristics. The selected objective function includes information about both modal frequencies and mode shapes of the bridge. An iterative approach has been undertaken to find the optimized structural parameters of the FE model which minimizes the selected objective function. Appropriate constraints and boundary conditions are used during the optimization process to prevent non-physical solutions. The final updated FE model of the bridge provides modal results which are very consistent with the experimentally measured modal characteristics.

Citation Download Citation

Amir A. Mosavi, Hassan Sedarat, Sean M. O'Connor, Abbas Emami-Naeini, Vince Jacob, Alex Krimotat, and Jerome Lynch "Finite Element model updating of a skewed highway bridge using a multi-variable sensitivity-based optimization approach", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 834727 (4 April 2012); https://doi.org/10.1117/12.916163

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available