Juliana Rochester

 Juliana Rochester
Mentor: Dr. Jennifer Rice
College of Engineering
 
The American Society of Civil Engineering issues a report card of America's infrastructure. Currently America's "GPA" is a D+, which means that the current quality of the infrastructure is poor and the low quality poses public safety concerns. Researching tools to perform structural health monitoring will provide a way to monitor the infrastructure and make necessary improvements. Research will give me an opportunity to find specifically which topics I am interested in, and I will gain experience in a subject that I think is pertinent.

Major

Civil Engineering

Minor

N/A

Research Interests

  • Structural Dynamics
  • Structural Health Monitoring
  • Sustainable Development

Academic Awards

  • UF University Scholars Program

Organizations

  • American Society of Civil Engineers
  • Chi Epsilon

Volunteer

  • N/A

Hobbies and Interests

  • Playing the Piano
  • Traveling
  • Hiking

Research Description

Structural Health Monitoring Utilizing a Radar-based Sensor Network
Bridge displacement is a characteristic of a structure’s behavior, and is one of the most significant parameters utilized in measuring the health of a bridge in both the short term and long term. Current methods to measure the deflections are Linear Variable Differential Transformer (LVDT), Laser Doppler Vibrometer (LDV), and GPS. These methods have their limitations. The LVDT approach requires a fixed reference point and if the height of the bridge is too great, sensor placement is challenging and the results are not reliable or accurate. LDV is both an expensive and bulky device that is not practical for measuring the health of a bridge. GPS has a low accuracy and low sampling rate, causing it also not to be an ideal approach. The purpose of this research is to create a low power, low cost displacement sensing device that accurately senses a range of structural health monitoring (SHM) applications; the project focuses on a radar-based sensor network. These sensors are placed on the bridge to deliver point measurements by generating signals that are reflected back to the radar and converted to baseband signals (I/Q); The signals are wirelessly transmitted. Displacement is obtained by arctangent demodulations of the baseband signals. The devices are tested utilizing a shaker table and varying the type of target surface, distance from the target, amplitude, frequency, etc. Static and dynamic load testing will follow testing the accuracy of the devices themselves.