Unit system of ElastomericX element

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Edmond2000
Posts: 12
Joined: Sat Jan 27, 2024 12:40 pm

Unit system of ElastomericX element

Post by Edmond2000 » Sat Mar 02, 2024 11:09 am

Dear STKO team,
In the webinar about seismic isolation, the tutorial uses the unit system of m-kg-N. If the unit system of mm-t-N is used to input parameters in the ElastomericX element, can OpenSEES calculate the correct result?

All the best

kesavapraba
Posts: 468
Joined: Sat Mar 28, 2020 2:25 pm

Re: Unit system of ElastomericX element

Post by kesavapraba » Mon Mar 04, 2024 12:57 pm

Hi, OpenSees follows a consistent unit system, which means you can use any unit system of your choice. However, it's important to note that all dimensions and material properties should be defined according to the chosen unit system. The results obtained will also be in the same unit system. As per the ElastomericX element's Wikipedia page (link below), both SI and Imperial unit systems can be used. However, please pay attention to the default values of the heating parameters, which are defined in SI units. If you want to use any other unit system, you will need to convert the values accordingly.

https://opensees.berkeley.edu/wiki/inde ... astomericX
:: With best wishes ::
Prabakaran Kesavan

Edmond2000
Posts: 12
Joined: Sat Jan 27, 2024 12:40 pm

Re: Unit system of ElastomericX element

Post by Edmond2000 » Mon Mar 04, 2024 1:06 pm

kesavapraba wrote:
Mon Mar 04, 2024 12:57 pm
Hi, OpenSees follows a consistent unit system, which means you can use any unit system of your choice. However, it's important to note that all dimensions and material properties should be defined according to the chosen unit system. The results obtained will also be in the same unit system. As per the ElastomericX element's Wikipedia page (link below), both SI and Imperial unit systems can be used. However, please pay attention to the default values of the heating parameters, which are defined in SI units. If you want to use any other unit system, you will need to convert the values accordingly.

https://opensees.berkeley.edu/wiki/inde ... astomericX
Thanks for your reply. I have built models using different unit systems and found the results to be equivalent.
Have a nice day.

kesavapraba
Posts: 468
Joined: Sat Mar 28, 2020 2:25 pm

Re: Unit system of ElastomericX element

Post by kesavapraba » Mon Mar 04, 2024 1:08 pm

You are welcome. Happy to note that.
:: With best wishes ::
Prabakaran Kesavan

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