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Can anyone help me in modeling by Takeda hysteretic rule in Ope

Posted by Rishabh Kumarover 7 years ago
Can anyone help me in modeling by Takeda hysteretic rule in Ope

Can anyone help me in modeling by Takeda hysteretic rule in OpenSEES?

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1 Reply
Posted by D SV NAGARJUNA REDDYover 7 years ago

There is no Takeda hysteresis rule in the original OpenSees...! However, it can be roughly resembled through "Hysteretic" or "Pinching4" materials. All of these models are rectilinear (polygonal) and have lots in common. You can simulate Takeda, for example with "Hysteretic" material as follows,
There is no pinching in Takeda, so use
pinchX=pinhy=1
There is also no strength degradation in Takeda, so use
damage1=damage2=0
(defined envelop can have negative stiffness to resemble strength deterioration)
Takeda's stiffness is degraded, so use
beta=0.7 or 0.8 or .... (depending on the required stiffness degradation)

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