Pushover of Wall
I am trying to "push" an unreinforced masonry wall. I am trying to get the base reaction vs. top displacement. The result of the analysis should coincide with the experimental results below:
I have tried to model the material using SOLID65, and material nonlinearity using William-Warnke concrete parameters. But, the model lost its convergence too early without even going into the nonlinear regime. I don't know what am I missing though. Another thing: I can't define nonlinearity using MISO. It displays warning that SOLID65 doesn't support MISO. So, I have simplified nonlinearity using BISO.
I have attached the input file for your reference. What I am trying to do in the input file is to give initial pressure at the top of wall and acceleration due to gravity in the first step of solution and acceleration in x-direction, as in a pushover in the second step. Then, I am getting the displacement and reaction forces in a text file. I am stuck in this for more than two weeks now, but can't figure out the solution. The model loses convergence too early. I can't get to the nonlinear regime as I expected.
Any help in this regard will be highly appreciated. Thanks in advance!