Need help:How to measure stress on a bridge.

In summary, The conversation is about a science project that involves measuring stress on different types of bridges. The speaker is looking for the most efficient way to measure the force per square area and suggests using a strain gauge or load cell. They also recommend researching both options to determine the best fit. The project involves measuring compression and tension on the bridge deck and another option mentioned is measuring deflection to calculate stresses.
  • #1
zyedy
2
0
I am doing a science project which i have to measure the stress put on the models of 3 different kinds of bridge, and was wondering what the most efficient way to measure the force per square area.

Thanks.
 
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  • #2
We'll need more details. Do you know what the forces are, so you can calculate the stresses, or do you want to directly measure stresses of the member ?

The best way I know to measure stresses like these is by using a strain gauge and deriving the stress from the strain in the member. Another option, is using a load cell, but that may be more expensive and harder to work with (but I could easily be wrong, and this might be just what you need).

I suggest you google both options and decide what will work best for you.
 
  • #3
I need to measure the amount of compression and tension on the surface of a model bridge deck, and I am not sure what the model will be made of yet, thank you though ill try that.
 
  • #4
One pretty simple additional option could be to measure, say, deflection at some point (typically maximum) and use that to calculate the stresses.
 

1. How do you measure stress on a bridge?

To measure stress on a bridge, strain gauges are often used. These gauges are attached to the bridge and measure the deformation caused by stress. The data collected from the strain gauges can then be used to calculate the stress on the bridge.

2. What factors contribute to the stress on a bridge?

Several factors can contribute to the stress on a bridge, including the weight of the structure itself, the weight of the traffic and other loads on the bridge, temperature changes, and environmental factors like wind and earthquakes.

3. How accurate are stress measurements on a bridge?

The accuracy of stress measurements on a bridge depends on several factors, such as the type of measuring equipment used, the placement of the gauges, and the expertise of the person conducting the measurements. Generally, stress measurements can be accurate within a range of 1-2%.

4. How often should stress measurements on a bridge be taken?

The frequency of stress measurements on a bridge will vary depending on the age, condition, and usage of the bridge. In general, it is recommended to take measurements at least once a year, but more frequent measurements may be necessary for older or heavily used bridges.

5. What can be done to reduce stress on a bridge?

If stress measurements indicate that a bridge is experiencing high levels of stress, there are several steps that can be taken to reduce it. These include reducing the weight of the bridge, implementing traffic control measures, and performing regular maintenance and repairs to keep the bridge in good condition.

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