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Large shears in concrete column

Erik Nelson — Wed, 29 Dec 2021 13:53:28 GMT

I have a parking garage I modeled with ramps. It is linked to ram concept. At the columns where the ramp occurs I get very large shear values in the columns regardless if they are modeled as gravity elements or lateral elements:

Should I ignore these? The shear reactions are should balance each other from the PT loading at each side based on reactions view within concept from hyperstatic loading.

Ram concrete analysis

Erik Nelson — Tue, 05 Oct 2021 12:31:44 GMT

When RAM concrete performs its analysis on a floor by floor basis, how does it construct the columns for analysis? If I have a sloping floor and there is a column that is only 0.1' high to the next level, but really that is a dummy height to make the transition and the true column height is 10'+ is this taken into account? I am concerned too much stiffness is attributed to the column greatly increasing my demands.

The same goes for the columns that are defined to the half true story height -are these modeled / analyzed as 5' members or their true height?

adjust concept geometry linked to structural system

Erik Nelson — Thu, 30 Sep 2021 18:58:58 GMT

I am designing a PT parking garage that starts in structural system and uses concept to design the floor plates. I have ramps created as intermediate levels that make the column lengths in concept too short which affects the stiffness and hyperstatic reactions.

I adjust the column height manually in concept but this get overridden on remeshing. what should I do to fix this issue? Do I need to save the concept model generated by structural systems separately, delete it from the working directory, and export results to structural systems to 'lock' the geometry?

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Thu, 30 Sep 2021 02:44:58 GMT

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