text-only page produced automatically by Usablenet Assistive Skip all navigation and go to page content Skip top navigation and go to directorate navigation Skip top navigation and go to page navigation
National Science Foundation
Awards
design element
Search Awards
Recent Awards
Presidential and Honorary Awards
About Awards
Grant Policy Manual
Grant General Conditions
Cooperative Agreement Conditions
Special Conditions
Federal Demonstration Partnership
Policy Office Website



Award Abstract #1342020

RAPID: Structural Damage Data Collection and Analysis of a Recently Damaged Bridge

NSF Org: CMMI
Div Of Civil, Mechanical, & Manufact Inn
divider line
Initial Amendment Date: May 8, 2013
divider line
Latest Amendment Date: May 8, 2013
divider line
Award Number: 1342020
divider line
Award Instrument: Standard Grant
divider line
Program Manager: Kishor Mehta
CMMI Div Of Civil, Mechanical, & Manufact Inn
ENG Directorate For Engineering
divider line
Start Date: May 15, 2013
divider line
End Date: April 30, 2014 (Estimated)
divider line
Awarded Amount to Date: $15,000.00
divider line
Investigator(s): Tat Fu tat.fu@unh.edu (Principal Investigator)
Erin Bell (Co-Principal Investigator)
divider line
Sponsor: University of New Hampshire
51 COLLEGE RD SERVICE BLDG 107
Durham, NH 03824-3585 (603)862-2172
divider line
NSF Program(s): Structural and Architectural E
divider line
Program Reference Code(s): 036E, 038E, 039E, 040E, 7914, 9150
divider line
Program Element Code(s): 1637

ABSTRACT

It is proposed to collect structural data of a damaged bridge in the next 4-6 weeks before repair is completed. The Sarah Long Bridge, a 2804-foot double deck truss bridge, in Portsmouth, New Hampshire, was struck by a 473-foot cargo ship on April 1, 2013. After visual inspection and assessment, it was determined that the primary structural damage is the severely bending of two members of the 227-foot segment of the steel truss and they must be replaced. The bridge is closed to traffic till the repairs are completed. The New Hampshire Department of Transportation estimates the repair to cost $2.5 million and take 4-6 weeks. The proposed work fits RAPID's goal given that the collision is a rare, unanticipated event and the short time period available to collect perishable vibration data on the damaged bridge.

The project team will deploy wireless sensors on the bridge and record ambient vibrations before and after the repairs. Additionally, the damaged structural members of the bridge will be documented and analyzed. The proposed measurements will provide rare data sets of a major structure at its damaged (pre-repair) and healthy (post-repair) states, which will help understand structural behavior of a damaged truss. The vibration data of the bridge at its healthy and damaged states will be analyzed and compared to identify changes in natural frequencies. In addition, the bridge data will also be used to develop a finite element analytical model of the bridge truss. The analytical model will be used to understand structural vibration characteristics of the truss and can postulate how frequencies of the truss will change with other damaged members. This exercise will answer the question of change in vibration frequencies with different levels of damage; and ultimately help in structural health monitoring field.

 

Please report errors in award information by writing to: awardsearch@nsf.gov.

 

 

Print this page
Back to Top of page
  FUNDING   AWARDS   DISCOVERIES   NEWS   PUBLICATIONS   STATISTICS   ABOUT NSF   FASTLANE  
Research.gov  |  USA.gov  |  National Science Board  |  Recovery Act  |  Budget and Performance  |  Annual Financial Report
Web Policies and Important Links  |  Privacy  |  FOIA  |  NO FEAR Act  |  Inspector General  |  Webmaster Contact  |  Site Map
National Science Foundation Logo
The National Science Foundation, 4201 Wilson Boulevard, Arlington, Virginia 22230, USA
Tel: (703) 292-5111, FIRS: (800) 877-8339 | TDD: (800) 281-8749
  Text Only Version