Member Release

Question

Hi All, 
 I am designing a Multistory RCC Building for Bus Depot. I have a dought regarding Member (Beam) Releses 
 How would I decide what releases has to be given at Start or End position of Beam for the Following conditions 
 1) Main Beam with Both ends resting on column 
 2) Beam with one end resting on column and other end resting on Beam 
 3) Secondary Beam with both ends resting on Main Beams 
 4) Cantilever Beams with one end resting on column and other end Free 
 Please help me for my doughts in Member Releases for RCC Structures 
 Thank you

Sye · Answer

The following general rules would apply for all of these cases. More than whether it is a beam connecting a column or a beam connecting to another beam, it is the nature of the connection and what forces the connection is able to take & transfer, that would govern the release specification. 
 For concrete structures with monolithic connections, the connections would be able to take and transfer moments between members and so you would not apply any releases to the beams. If there is a situation where you have beams not monolithically connected to the supporting beams/columns and is just going to transfer the loads in shear but no moments, you would release MZ ( also MY if release is required for minor axis ) at the start/ends of these supported members. The supporting members will not have releases. 
 A cantilever beam would of course have a fixed connection to the column and so no releases.

Modestas · Answer

I don't see any such warning for Beam #55 in your model. Which STAAD.Pro version are you using? I ran your model with the most recent STAAD.Pro CE version 22.06.00.138.

Modestas · Answer

The two way floor load is reported in the Output file as a series of concentrated loads (CON).

L shaped concrete beams can be designed in the Advanced Concrete Design workflow (RCDC) in STAAD.Pro CONNECT Edition.