The OpenSees Community

[quote="robby_fr"]Hi, I'm a researcher of university of Bologna, Italy, I work with prof. M. Savoia and B. Ferracuti. For long time my working group studies the effect of FRP-confinement in RC columns. Prof. Savoia developed an iterative cyclic constitutive law for FRP-confined concrete fo...

[quote="silvia"]the concrete model with lateral-confienemtn effects is still under developement -- Prof. Mosalam at ucb is working on it. you might just want to increase the concrete strength in that region.[/quote] Dear Dr. silvia, about you suggest "you might just want to increase t...

I think that my points are as follows: From simulation results, when we use bond_sp01 model, it actually can reduce the inital stiffness (or the secant modulus of the first cycle). My understanding is that the bond_sp01 can be seen as a weak material compared to steel. In some experimental case, the...

[quote="silvia"]the concrete model with lateral-confienemtn effects is still under developement -- Prof. Mosalam at ucb is working on it. you might just want to increase the concrete strength in that region.[/quote] is the model proposed in the followning paper "A computational model ...

I found if I used the equation recommended by Dr. Zhao (the presenter of bondsp01). The initial tangential stiffness of bondsp01 (about 3000) is approximately 10 percent of that of the corresponding steel (about 29000). The initial stiffness is generally reduced no more than 7% as the tangential sti...

Dear Dr. Silvia, Also, I found that the bondsp01 model only slightly change the initial stiffness of the specimens. This is reasonable, as at the initial loading stage, the slip between the concrete and reinforcing steel is small. That is another problem. If the initial stiffness obtained from test ...

Dear yFang and Dr. Silvia, If I just want to do a pushover analysis, does that means bondsp01 model is not so different from a common material (e.g. steel02) . For example, if I set the paprameter values of steel02 and bondsp01 to let them have almost the same enveop and use them in zerolength eleme...

I have used ReinforcingSteel with bondsp01 and found it was very hard to converge. I thought maybe this problem due to the inconsistence between the bondsp01 and ReinforcingSteel. The latter have a yield platform while the former does not. About the local bond-slip model, it is more common to relate...

[quote="yfeng"]You must use steel02 instead of ReinforcingSteel. [quote="xiaoqg2003"]Dear Dr.s constraints Plain, I want to know whether the bondsp01 model can be used with ReinforcingSteel or it should be just used with steel02 which does not have yield platform.[/quote][/quote]...

Dear Dr.silvia,

I want to know whether the bondsp01 model can be used with ReinforcingSteel or it should be just used with steel02 which does not have yield platform.