Featured Research

from universities, journals, and other organizations

Bad Vibes Can Indicate Structural Damage In Bridges

Date:
May 6, 2007
Source:
Queensland University of Technology
Summary:
By monitoring changes in vibrations of bridges it is possible to identify hidden cracks and fractures, according to engineers. Variations in the vibrations of a bridge could be a telling sign of its structural "health."

Engineering researcher Henry Shih.
Credit: Image courtesy of Queensland University of Technology

By monitoring changes in vibrations of bridges it is possible to identify hidden cracks and fractures, according to a Queensland University of Technology researcher. QUT engineering researcher Henry Shih said variations in bridge vibrations of a bridge could be a telling sign of its structural "health".

Related Articles


"It's not always possible to see damage to a bridge, but using vibrations it is possible to 'see' what can't be seen," he said.

"Changes in the physical properties of a structure, such as cracks and fractures in a bridge, will cause changes in its vibration. By monitoring these vibrations it is possible to detect any changes which may indicate bridge damage."

QUT has undertaken research in bridge vibration for more than 10 years and this has involved monitoring vibrations in some of Brisbane's bridges. As a part of this on-going research program Mr Shih will develop models to assess the damage in certain types of bridges.

Mr Shih said given Brisbane was a river city linked by a criss-cross of bridges, it was important to continuously monitor the "health" of these structures. "Bridges form an important part of civil infrastructure and are normally designed to have long life spans. But changes in load characteristics, deterioration with age, environmental influences and random actions may cause damage to bridges," he said.

"Continuously monitoring the health of bridges will enable the early identification of distress and allow appropriate retrofitting in order to avoid bridge failure or collapse."

Mr Shih's research will use computer modeling to test the vibration characteristics of beam type and truss type bridges before and after damage "As part of the study we will install sensors to monitor the vibrations of simulated bridge models in the laboratory. We will then calibrate the computer models to ensure the data is accurate," he said.

"Just like an electrocardiogram can measure the health of a heart, by monitoring vibration characteristics we can evaluate the health of a bridge."

He said by inputting the data into a computer modelling system it was possible to assess whether or not the bridge was in distress or at risk of failure or collapse. "We are going to be able to rate how healthy the bridge is and also monitor its deterioration over time."

Mr Shih's PhD study is supervised by Professor David Thambiratnam in QUT's Faculty of Built Environment and Engineering.


Story Source:

The above story is based on materials provided by Queensland University of Technology. Note: Materials may be edited for content and length.


Cite This Page:

Queensland University of Technology. "Bad Vibes Can Indicate Structural Damage In Bridges." ScienceDaily. ScienceDaily, 6 May 2007. <www.sciencedaily.com/releases/2007/05/070502111541.htm>.
Queensland University of Technology. (2007, May 6). Bad Vibes Can Indicate Structural Damage In Bridges. ScienceDaily. Retrieved March 28, 2015 from www.sciencedaily.com/releases/2007/05/070502111541.htm
Queensland University of Technology. "Bad Vibes Can Indicate Structural Damage In Bridges." ScienceDaily. www.sciencedaily.com/releases/2007/05/070502111541.htm (accessed March 28, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, March 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Inspectors Found Faulty Work Before NYC Blast

Inspectors Found Faulty Work Before NYC Blast

AP (Mar. 27, 2015) An hour before an apparent gas explosion sent flames soaring and debris flying at a Manhattan apartment building, injuring 19 people, utility company inspectors decided the work being done there was faulty. (March 27) Video provided by AP
Powered by NewsLook.com
Facebook Building Plane-Sized Drones For Global Internet

Facebook Building Plane-Sized Drones For Global Internet

Newsy (Mar. 27, 2015) Facebook on Thursday revealed more details about its Internet-connected drone project. The drone is bigger than a 737, but lighter than a car. Video provided by Newsy
Powered by NewsLook.com
Robot Returns from International Space Station and Sets Two Guinness World Records

Robot Returns from International Space Station and Sets Two Guinness World Records

Reuters - Light News Video Online (Mar. 27, 2015) The companion robot "Kirobo" returns to earth from the International Space Station and sets two Guinness World Records. Sharon Reich reports. Video provided by Reuters
Powered by NewsLook.com
Residents Witness Building Explosion, Collapse

Residents Witness Building Explosion, Collapse

AP (Mar. 26, 2015) Witnesses recount the sites and sounds of a massive explosion and subsequent building collapse in the heart of Manhattan&apos;s trendy East Village on Thursday. (March 26) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins