The OpenSees Community

Hi both, Thanks for replying. I've spent some time making some simplified models and here's what I've found. Any combination of negative delta_y, or gap, results in convergence issues when analyzing a ground motion (regardless of whether or not impact is expected). Moreover, the example script for t...

Hi, The wiki page for Impact Material notes the following: "This material is implemented as a compression-only gap material. Delta_y and gap should be input as negative values." I'd like to know if this holds true even if the impact is travelling in the negative X direction. In particular, I'd like ...

Hi all, Is it possible to apply Rayleigh damping to only part of a building model? For example, I am modeling a frame with triple friction pendulum bearings, and the bearings inherently has hysteretic damping; therefore, I'd like to add Rayleigh damping to the superstructure frame alone. Could this ...

Hi OpenSees community, I'm curious if it's possible to specify the initial stiffness "kInit" of the singleFPBearing as F_y/u_y rather than the current mu/u_y. I currently have kInit as defined via the wiki page: mu/u_y. However, I am running into strange results where bearings that take double the l...