Engineering Commons^™

Dynamic Testing And Finite Element Modeling Of A Steel Girder Bridge For The Long-Term Bridge Performance Program, Lourdes Alina Taveras Moronta

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Long-Term Bridge Performance (LTBP) Program, under the direction of the Federal Highway Administration’s (FHWA’s) Office of Infrastructure Research and Development, is monitoring nation’s pilot highway bridges to promote the safety, durability, and reliability on the bridges of the nation. Researchers at Utah State University directed dynamic testing on the New Jersey Pilot Bridge, structure number 1618-150 the summer of 2011 to analyze and understand the dynamic behavior of the structure.

In order to perform the monitoring of the bridge, ambient vibration analysis was selected for this structure, which was instrumented with an array of velocity transducers to record the …

Structural Identification And Damage Identification Using Output-Only Vibration Measurements, Shutao Xing

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation studied the structural identification and damage detection of civil engineering structures. Several issues regarding structural health monitoring were addressed.

The data-driven subspace identification algorithm was investigated for modal identification of bridges using output-only data. This algorithm was tested through a numerical truss bridge with abrupt damage as well as a real concrete highway bridge with actual measurements. Stabilization diagrams were used to analyze the identified results and determine the modal characteristics. The identification results showed that this identification method is quite effective and accurate.

The influence of temperature fluctuation on the frequencies of a highway concrete bridge was …