STAAD RCDC, Ductile shear calculation in beam design as per IS code

Issue 1:

In RCDC, for Beam ductile design using IS code, how is the ductile shear being calculated?

I have referred to RCDC help file as well as RCDC Beam FAQ (Q.31) given in the link below.

https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/41953/rcdc-beam

I am able to grasp the technical intent, but unable to validate the formulas as the values which I am computing using given formulas (refer below) are not matching with the RCDC output. 

I also tried to find validation sheets for ductile beam design using IS code, but its not available. Only Non-ductile beam design validation is available. 

I am also attaching a typical design for reference and and would appreciate if calculations using the same reference can be demonstrated.

Issue 2: 

While transferring loads from STAAD to RCDC for beams, the loads are not transferred exactly. Some deviation (although not significant) is observed in them. What could be the probable reason for the same?

PDF

Parents
  • Hello Arpit,

    First of all I would like to confirm if you are using the latest version of STAAD and RCDC? The latest versions are 22.08.00.175 and 11.01.00.180 respectively. If you are using any older version, please upgrade and check the issues specifically related to member forces.

    However, if you still have the doubts please upload the STAAD, RCDX files along with your hand calculation for our quick check and investigation. Please also mention the query with relevant snaps for quick understanding. As it is difficult to answer any generic validation question.

    VD+L is the value of 1.2*(DL+LL) as already mentioned. Code has suggested to take this value is sway shear calculation. If you are getting any other value in your calculation please send us the calculation to check.

    However, you can download the validation for ductile shear from the below link.

    https://communities.bentley.com/products/ram-staad/m/structural_analysis_and_design_gallery/273716

    Thanks & regards,

    Abhisek M

    Global Technical Support

    https://www.bentley.com/en/Perspectives-and-Viewpoints/Topics/Newsletter/Overview?utm_source=external&utm_medium=email&utm_campaign=dn-digital-currency-newsletters&utm_content=en___subscribe__email-signature-banner&utm_term=subscribe-to-newsletter___banner&partnerref=external

    Subscribe Here

Reply
  • Hello Arpit,

    First of all I would like to confirm if you are using the latest version of STAAD and RCDC? The latest versions are 22.08.00.175 and 11.01.00.180 respectively. If you are using any older version, please upgrade and check the issues specifically related to member forces.

    However, if you still have the doubts please upload the STAAD, RCDX files along with your hand calculation for our quick check and investigation. Please also mention the query with relevant snaps for quick understanding. As it is difficult to answer any generic validation question.

    VD+L is the value of 1.2*(DL+LL) as already mentioned. Code has suggested to take this value is sway shear calculation. If you are getting any other value in your calculation please send us the calculation to check.

    However, you can download the validation for ductile shear from the below link.

    https://communities.bentley.com/products/ram-staad/m/structural_analysis_and_design_gallery/273716

    Thanks & regards,

    Abhisek M

    Global Technical Support

    https://www.bentley.com/en/Perspectives-and-Viewpoints/Topics/Newsletter/Overview?utm_source=external&utm_medium=email&utm_campaign=dn-digital-currency-newsletters&utm_content=en___subscribe__email-signature-banner&utm_term=subscribe-to-newsletter___banner&partnerref=external

    Subscribe Here

Children