You are here:

Civil Engineering/Bridge Structure Load / Stress Testing Tools.

Advertisement


Question
QUESTION: Dear Babak

https://en.wikipedia.org/wiki/Bridge
http://pghbridges.com/basics.htm
http://science.howstuffworks.com/engineering/structural/10-amazing-bridges.htm
http://www.brantacan.co.uk/bridges.htm
http://www.bridge.t.u-tokyo.ac.jp/index_e.html


Are there Load / Stress Testing available during Bridge Site Inspection which will help the Structural
Engineer to take a decision whether the Bridge requires renovation measures ?.

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

ANSWER: Dear Prashant

There is no instrument to check the integrity and strength of a structure. But there exist methods and procedures  to assess the structural safety. These methods are based on probabilistic study of credible behavior of the structure (bridge) according to measurement of displacement time history due to current loading and traffic.

Waiting for your further question.

Regards
BEH



---------- FOLLOW-UP ----------

QUESTION: Dear Babak

Thank you.

http://en.wikipedia.org/wiki/Stress_analysis‎
http://en.wikipedia.org/wiki/Limit_state_design‎
http://en.wikipedia.org/wiki/Beam_(structure)‎
http://www.dot.ca.gov/hq/esc/techpubs/manual/bridgemanuals/bridge-design-practic
http://www.cadreanalytic.com/Cadrepro.htm

The Functional Blocks are 1. Input 2. Process 3. Output.

Is it possible to design and develop machines/tools/instruments/devices which will / can produce the results /outputs as after feeding the input - Stress Load - Weight as Automobiles, Human beings, Animals etc, Time Period and Strength of materials - concrete, steel, sand, bricks, cement, wood etc do the mathematical calculations/computations in the processing part and give the results (output) as "20 % structural repairs/renovation measures required", "50 % structural repairs/renovation measures required", "100 % structural repairs/ renovation measures required", "0 % structural repairs/renovation measures required"  similar to Geological Instruments ?.

Detailed analysis reports could be "Specific Column/Beam repairs required".

http://commons.wikimedia.org/wiki/Category:Geological_instruments‎
http://www.ukge.com/
http://www.geo-tools.com/‎

For examples : Multiple Cables probes physically connected to the column beam/s below the ground accepting the distribution Load, Calculations of the stress forces and producing the Output by the instrument/s as mentioned.

Awaiting your reply,

Thanks & Regards,
Prashant S Akerkar

ANSWER: Dear Prashant

I would rather say it is not impossible doing what you plan to do with probabilistic methods like bayesian inference or so. You must have a strong base of probability and decision theory. It is fantastic.

Regards
BEH

---------- FOLLOW-UP ----------

QUESTION: Dear Babak

Thank you.

References  -   Strain Gauge Class of Instruments
--------------------------------------------------

http://en.wikipedia.org/wiki/Strain_gauge‎
http://www.ni.com/strain/
http://www.testingmachines.com/stress-and-strain-testers.html
http://www.vtiinstruments.com/Practical-Strain-Measurements.aspx
http://www.cv.nctu.edu.tw/~wwwadm/chinese/teacher/Ppt-pdf/AGTwk3%20Strain%20and%
http://www.sensing-systems.com/industries_served/power_generation/default.html
http://www.omega.co.uk/prodinfo/strain_gauges.html
http://www.britannica.com/EBchecked/topic/567953/strain-gauge
http://www.tiniusolsen.com/pdf/Pamphlet4.pdf
https://www.google.co.in/search?q=stress+/+strain+measuring+instruments&tbm=isch&tbo=u&source=univ&sa=X&ei=-fKRUfenB8KGrAfaxIDQBg&sqi=2&ved=0CGkQsAQ&biw=1280&bih=699
http://www.straintech.fi/pdf/whats.pdf
http://www.uotechnology.edu.iq/dep-cse/lectures/2/Measurements.pdf
http://me.yeditepe.edu.tr/courses/me402/lab%20manuals/strain%20gauges.pdf
http://soliton.ae.gatech.edu/people/jcraig/classes/ae3145/Lab2/strain-gages.pdf



Thanks & Regards,
Prashant S Akerkar

Answer
Dear Prashant

All instrumentations and gauges are to provide data to make you able to make decision about the severity of problems in the structure. Then these are the first step of the process of decision. The decision itself is the next step.

Regards and Thank you
BEH  

Civil Engineering

All Answers


Answers by Expert:


Ask Experts

Volunteer


Babak Esmailzadeh Hakimi

Expertise

I can answer questions in Structural Engineering, Earthquake Engineering, Project Management and Project Control topics!

Experience

I am experienced in the area of earthquake engineering in electrical power industry, i.e. Lifeline Earthquake Engineering. My focus has been on structural seismic design of power installations. Recently I have got involved in project management in the category of constructional engineering.

Organizations
Sinam Consulting Engineers Co.

Education/Credentials
Bs degree in Civil Engineering from Ferdowsi University ,1988, Mashhad Iran, Ms degree in Earthquake Engineering, Sharif University of Technology, 1993, Tehran, Iran

©2016 About.com. All rights reserved.