Element removal beyond a threshold material stress value

[koushik]

The following command I want to use; the problem I am facing is that the present code fails to calculate the stress in element ($material_stress) while the program running. My actual aim is to detect the real time failure and to check the dynamic properties of a structure when few members getting failed.

if {$material_stress >= $threshold_value} {
remove element 7
remove element 11
puts "member 7 & 11 removed sucessfully at t = $tCurrent"
}

Thanks in advance.
best regards,
Koushik

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PhD Student(Structural Engineering)
Department of Civil Engineering
IIT Kanpur
India-208016
alternate email: koushik@iitk.ac.in