Damping of the Soil in ABAQUS ??

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Berislav Kralj

Can you explain a bigger picture, i.e. what are you ultimately trying to model. You are obviously interested in the dynamic analysis. is it to do with a soil-structure interaction or something different? Is it a design project which needs to follow certain design codes or is it a first principles approach? What type of dynamic analysis are you envisaging, time history, response spectrum or ...?

Alireza Jafari Nodoushan

Hi Dear Berislav Kralj

i want to simulate 2 models

1- model 10 different layers of soil in one medium layer under Earthquake load (time history) in Explicit (direct integration method)

2-model Soil (10 layers . .) structure interaction (SSI) in explicit under Earthquake load

Thanks

Interesting that you are doing an explicit analysis. Have you checked section 25.1.1 of the Abaqus manual (version 6.11) which goes into detail of damping. It seems that you will need to use what they call Material Damping.

On a different topic, I assume that your seismic event is defined as a free field motion. Have you deconvoluted it to the bedrock, or do you intend your model to help you with that. Also, I think that programs like FLAC are better suited for problems like that.

Naveel Islam

I want to add an additional question as this is related to the above question

Although in the ABAQUS Explicit equation solver there is no Damping co-efficient ,is it still worthwhile to add material damping as Rayleigh Damping parameters ?