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  1. Datpt

    Longitudinal shear between web and flange of T-beam

    Well, based on that statement, the transverse bending bars can also be used to resist the longitudinal shears. However, I cannot imagine the mechanical meaning of that since both forces can occur at the same time and both of them induce tension forces on transverse bars.
  2. Datpt

    Longitudinal shear between web and flange of T-beam

    I agree, they should be added up since both forces cause tension stress on rebars. Maybe the EC2-2023 has some typos.
  3. Datpt

    Longitudinal shear between web and flange of T-beam

    I do agree with that. Lets call [1] is steel for shear and [2] is the steel for bending. The one that you rewrite is similar to FIB's model code which said that the rebars should be superimposed. Total rebar is [1]+[2] where [1] can be on bottom or top while [2] should be on the tension fibre...
  4. Datpt

    Longitudinal shear between web and flange of T-beam

    Hi everyone, Recently, I’ve been designing a lot of ribbed slabs and have a question about the calculation of transverse reinforcement for resisting longitudinal shear between the web and the flange of T-beams. The general approach for this is clear: we use the strut-and-tie model, where...
  5. Datpt

    Inputting shear diagram to RAPT

    To Rapt. Thank you so much. I deeply apriciate this!
  6. Datpt

    Inputting shear diagram to RAPT

    To Rapt I sent an email to the address "support@raptsoftware.com", asking this question on the 29th of September but there has been no reply since then.
  7. Datpt

    Inputting shear diagram to RAPT

    Hi everyone, Currently, I am using RAPT for designing beams and slabs. When inputting span moment diagrams, I have noticed that RAPT automatically calculates corresponding shear diagrams. However, I have observed that the sign of shear forces is provided in a reversed manner, as indicated in...
  8. Datpt

    Moment Magnification Question

    For bi-axial loaded columns, you should not check the strength in two directions separately. You have to combine the forces together and check the column strengths based on the 3D interaction diagram. The checking must repeated for all load combinations separately. In the case where it is...
  9. Datpt

    Pattern liveloading for serviceability limit states

    Lomarandil, the checking of pattern live loading is a must for strength checking in most cases. Both EC and ACI have very clear requirements for this. However, the requirement for pattern live loading at service check is quite vague.
  10. Datpt

    Pattern liveloading for serviceability limit states

    My practice has been to include pattern loading for serviceability checks. With continuous spans, you have a similar possibility (probability?) of one span loaded while adjacent spans less so. The only thing I might consider would be to alternate only 50-75% of the live load when doing...
  11. Datpt

    Pattern liveloading for serviceability limit states

    Without any basis, I've historically applied pattern loading throughout my design when it is appropriate. I'll be curious to hear if there is justification to not do so. => thank you so much for sharing, however, the problem is when it is appropriate to design with pattern loading for service...
  12. Datpt

    Pattern liveloading for serviceability limit states

    Hi everyone. I am writing to seek your opinions on the application of pattern live loading for serviceability checks of floor systems. I am using Eurocode and ACI for designing floor systems. According to EC2 Section 5.1.3, pattern live loading is required for the design of slabs and beams...
  13. Datpt

    Moment redistributions in RAPT

    Hi everyone, Currently, I am using RAPT for designing beams and slabs. I see that RAPT only allows moment redistribution for braced frames. I think this restriction is made to prevent the redistribution of moments due to lateral loads, which can lead to the lateral instability of the frames...

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