Hysteretic model

civilengineering · Post by **civilengineering** » Fri Jan 06, 2017 9:57 am

Hi everyone

How can I change a Hysteretic material model to a bilinear material model such that lead to same analysis results?

In this regard, firstly, I conducted time history analysis with the below material model (Elastic-Perfectly Plastic):

uniaxialMaterial ElasticPP 1 $k 0.01789755

secondly, I conducted the same analysis again but with hysteretic material model:

uniaxialMaterial Hysteretic 1 [expr $k*0.01789755] 0.01789755 [expr $k*0.01789755] [expr 1000.0*0.01789755] [expr -1*$k*0.01789755] -0.01789755 [expr -1*$k*0.01789755] [expr -1*1000.0*0.01789755] 1. 1. 0. 0. 1.

but the results of two analyses are not identical. What should I do?