jnnrp
Civil/Environmental
- Feb 12, 2013
- 1
hey everybody,
i'm designing a framed concrede structure for a test on the ductility of recycled concrete. The structure has two floors and on each one i have 2 cables pushing the structure. In order to dimension the foundations, I need to estimate the forces for the collapse mechanism.
How would you model such situation?
I defined PMM hinges using the moment curvature relations from the section designer of Sap and applied the cable forces as nonlinear. I defined them with a small value and changed their scale factor to reach the collapse. The problem is that i dont reach it. The hinges change their states but the structure just keeps receiving higher and higher loads and the analysis only stops because of a huge number of null steps.
Any ideias of what I can be doing wrong?
Any help is MUCH appreciated
i'm designing a framed concrede structure for a test on the ductility of recycled concrete. The structure has two floors and on each one i have 2 cables pushing the structure. In order to dimension the foundations, I need to estimate the forces for the collapse mechanism.
How would you model such situation?
I defined PMM hinges using the moment curvature relations from the section designer of Sap and applied the cable forces as nonlinear. I defined them with a small value and changed their scale factor to reach the collapse. The problem is that i dont reach it. The hinges change their states but the structure just keeps receiving higher and higher loads and the analysis only stops because of a huge number of null steps.
Any ideias of what I can be doing wrong?
Any help is MUCH appreciated