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".

"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 April 23, 2014 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 April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com
China Falls for 4x4s at Beijing Auto Show

China Falls for 4x4s at Beijing Auto Show

AFP (Apr. 22, 2014) The urban 4x4 is the latest must-have for Chinese drivers, whose conversion to the cult of the SUV is the talking point of this year's Beijing auto show. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Lytro Introduces 'Illum,' A Professional Light-Field Camera

Lytro Introduces 'Illum,' A Professional Light-Field Camera

Newsy (Apr. 22, 2014) The light-field photography engineers at Lytro unveiled their next innovation: a professional DSLR-like camera called "Illum." Video provided by Newsy
Powered by NewsLook.com
3 Reasons Why Harley Davidson Is Selling Tons of Epic Hogs

3 Reasons Why Harley Davidson Is Selling Tons of Epic Hogs

TheStreet (Apr. 22, 2014) Sales of motorcycles have continued to ride back from the depths of hell known as the Great Recession. Excluding scooters, sales of motorcycles increased 3% in 2013. In units, however, at 465,000 sold last year, the total remained about 50% below the peak hit in 2007. Industry leader Harley Davidson’s shareholders have benefited both by the industry recovery and positive headlines emanating from the company. Belus Capital Advisors CEO Brian Sozzi takes you beyond the headlines of the motorcycle maker. Video provided by TheStreet
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:
from the past week

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