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According to the Dissertation of D. Lignos 2008, Λs,c,a,k should be close to 1.0 depending on fc , ρsh,eff, sn and some other parameters. Besides, in the Dissertation, he mentioned that "use of the same Λ value for all four deterioration modes usually provides adequate description of each deter...

In this book, there are some explanations of how to calculate the modified parameters for plastic hinge. However, there is no explanation that why n is selected as 10. In this book, it mentioned that "a value of n = 10 was used throughout this study." on P 299. I do a test by using OpenSee...

I wonder to install a new material into OpenSees Navigator. I down load the "OpenSeesNavigator2.5.1-pCode-32bit.zip" and run the OpenSeesNavigator. I read the introduction website as below: http://peer.berkeley.edu/OpenSeesNavigator/Web/OSN_Downloads_pCode.htm However, I could not find the...

Thank you for your answer~

My question is that about the "MinMax Material" "when the strain ever falls below or above certain threshold values,the other material is assumed to have failed" is the way we all know. but when the strain rise back into the threshold values, what will happen then? The other mate...

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Thank you Frank, I have get the solution and have a promotion, thank you for your answer~

This is the promotted method~
http://opensees.berkeley.edu/community/ ... =2&t=44478

Thank you for your answer and i get what i want. Thanks again~~~

~~(╯﹏╰)b,sorry herhaps it's my fault not describe it clearly. I wander to build the compound section in 4 kinds of parts first, the inside circle section and make the dimension i need. second, four outside frame with rectangular sections, which is located outside the circle section in top, bottomand...

Thank you vesna,your suggestion is feasible and I believe is the only way now to build this kind of section. Perhaps we should have the "cut" command in OpenSees someday~~ I wander to build it using your first and second suggestions but for the rest of the section between the rectangular f...

I wanderto build a rectangular section in which I want to put a circle section in different kind of material. But the OpenSees don't have a command of cut,so how to build a circle section in a rectangular section??? I have try to build a rectangular section first and circle above and a third circle ...

I wanderto build a rectangular section in which I want to put a circle section in different kind of material. But the OpenSees don't have a command of cut,so how to build a circle section in a rectangular section??? I have try to build a rectangular section first and circle above and a third circle ...

I wander to build the material model of FRP, but the material of FRP is not as same as steel which could keep the stress after the elastic transformation into plasticity. the FRP material will break and quit after it reach the ultimate load, so the curve will come down after the elastic transformati...

I am afraid that the model you build of FRP is not correct. because of you write the material of the FRP as uniaxialMaterial ElasticPP $IDfrp $Ef $ef 0; but the material of FRP is not as same as steel which could keep the stress after the elastic transformation into plasticity. the FRP material will...

to Sumit Jindal I copy your model and put the analysis "while loop" module and run it. It failes in all kinds of analysis i used. Although i didn't make it run but there are some suggestions to you. 1.all the units used in OpenSees is British units just like "inch" and "kip&...