model elastomeric bearing in midas civil

Fatigue Load Model A model prescribing axle configurations, axle loads and number of lorries that must be considered in a fatigue (life) assessment. the result after using the multilinear link is excessive vertical deformation, and the gap element seems to restrict vertical separation when it shouldn't. Elastomeric pad / disc Component (of a pot bearing) which provides the rotational capability. I tried both multilinear(high stiffness for negative deformation, low stiffness for positive deformation) and gap links with no success. I have added separate links at the bearing location to try and model this behavior. Generally with this type of bridge and bearing type there is no vertical restraint preventing pad/girder separation under vertical ground motions. Superstructure: The bridge deck will be analysed as a 2-D grillage model using linear elastic analysis and proprietary software such as Midas Civil, or. This will simulate vertical pounding between the bearing pad and girder bottom. the bearings need to be able to release the girders if the girder wants to separate vertically from the bearing pad but yet the pad needs to support the girder when the girder makes contact with the pad. On another note, I am applying vertical ground motions as well to the models. My professor and I are the only ones using this program at this university and its the first time using it for both of us. In particular, the buckling load is low and the P- effect is significant, as compared to standard columns neglecting shear deformations. I am looking for any way to expedite the process. The effect of weak shear rigidity is important in the analysis of elastomeric bearings used for base isolation of buildings. I was hoping that I would be able to combine them into one link due to the number of bridges I need to analyse. Yes I did end up modeling the bearing as 2 separate links, one for the pad another for the dowels and it seems to be working.

Model elastomeric bearing in midas civil