## How to simulate seismic conditions with non-uniform excitation in Opensees？

A place to ask questions on how to use OpenSees to perform Finite Element Reliability Analysis

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cexuhan
Posts: 11
Joined: Mon Mar 04, 2019 6:00 pm
Location: The University of Queensland

### How to simulate seismic conditions with non-uniform excitation in Opensees？

Hi All,

According to my knowledge, the uniform excitation can be achieved in Opensees by calling the "UniformExcitation" sentence. But if I wanna simulate the earthquake cases with non-uniform excitation, that is, considering that the ground motion excitation of the earthquake at different bearing positions is different, is there any feasible way to simulate it in Opensees?

Thanks a lot for any possible help.

Xu

mhscott
Posts: 776
Joined: Tue Jul 06, 2004 3:38 pm
Location: Corvallis, Oregon USA
Contact:

### Re: How to simulate seismic conditions with non-uniform excitation in Opensees？

Yes, search online for OpenSees multiple support excitation.
OpenSees blog: www.portwooddigital.com
OpenSees Cloud: www.openseescloud.com

cexuhan
Posts: 11
Joined: Mon Mar 04, 2019 6:00 pm
Location: The University of Queensland

### Re: How to simulate seismic conditions with non-uniform excitation in Opensees？

mhscott wrote:
Tue Aug 10, 2021 4:35 pm
Yes, search online for OpenSees multiple support excitation.

sonshitsu
Posts: 1
Joined: Wed Sep 21, 2022 12:56 pm

### Re: How to simulate seismic conditions with non-uniform excitation in Opensees？

cexuhan wrote:
Sat Aug 07, 2021 5:58 pm
Hi All,

According to my knowledge, the uniform excitation can be achieved in Opensees by calling the "UniformExcitation" sentence. But if I wanna simulate the earthquake cases with non-uniform excitation, that is, considering that the ground motion excitation of the earthquake at different bearing positions is different, is there any feasible way to simulate it in Opensees?

Thanks a lot for any possible help.

Xu
Thank you.

ColtonAxel
Posts: 1
Joined: Tue Jan 31, 2023 6:54 am

### Re: How to simulate seismic conditions with non-uniform excitation in Opensees？

cexuhan wrote:
Sat Aug 07, 2021 5:58 pm
Hi All,

According to my knowledge, the uniform excitation can be achieved in Opensees by calling the "UniformExcitation" sentence. But if I wanna simulate the earthquake cases with non-uniform excitation, that is, considering that the ground motion excitation of the earthquake at different bearing positions is different, is there any feasible way to simulate it in Opensees?

Thanks me on https://knifeplatoon.com for any possible help.

Xu
To simulate seismic conditions with non-uniform excitation in OpenSees, you can follow these steps:

Define a time series that represents the non-uniform excitation.
Apply the time series to the desired nodes or elements in the model using the TimeSeries and Pattern commands.
Define a seismic load pattern using the LoadPattern command and specify the type of ground motion analysis (e.g. response history analysis, linear dynamic analysis).