Different methods of modelling a Floor Diaphragm in STAAD || FEM, Rigid Diaphragm || Slab design

In this video, I will cover few advanced methods of modelling a reinforced concrete slab in STAAD which can be transferred to RCDC and RAM Concept module for design. There are few advantages and disadvantages of modelling a slab in STAAD, which method is best suitable based on the type of slab, that I will cover in details.
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[@structuraldesignerscatenoi5358]

Thank you for this insightful video! The detailed explanation on modeling slabs as both individual elements and as diaphragms has significantly enhanced my understanding. I appreciate the depth of knowledge shared-it's truly valuable for my design projects. Keep up the great work.

[@designutama]

top model

[@termi3-l9f]

Very good 👍🏻

[@josephlucas4115]

Thank you Surojit your platform is one of the best platform for learning,please may you upload the continuation of Seismic (Dynamic analysis) using IS code

[@binayaksamanta863]

Excellent

[@josephlucas4115]

I have some questions. In previous sessions, you said that for flexible diaphragm it is not possible to perform torsion check,is there any trick to overcome this limitation especially when a model has cantilever plates? 2.For semi rigid diaphragm,does STAAD perform torsion check? 3.How can we model flexible diaphragm and how to make software consider it directly? 4.How to model flexible diaphragm in STAAD as well? 5.For the case of plate cut out you said we have to select the nodes located in the floor slab and ignore any node at cut out,then program understands that there is no diaphragm that means we have to put nodes too where we dont have slab plates? 6.You said slopped diaphragm are not supported in STAAD which trick can be used to overcome this?

[@shamamba02]

good day Sir ! this question is a little bit out of topic. I just want to ask if it is good to model and analyze the steel truss and purlins WITH the main concrete frame structure? or is it best to analyze it separately?

[@surojit_ghosh]

If you have a concrete-steel composite type of structure and you want to design steel as well as concrete, it is better to model those in the same file. That replicate the actual behavior of the structure during structural analysis (eg. during seismic analysis). But if you only want to analyze and design the steel truss, then you can model that portion only, assign support at proper location and apply load.

[@shamamba02]

@@surojit_ghosh Thank you very much sir! your videos and knowledge are so helpful!