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  1. bkal

    Stress values are more compared to experimental results and cracks are not formed on concrete for DOUBLE PUNCH TEST simulation in abaqus software

    A plot of principal stress (stresses) in a cross section (vertical, through the centre of the cylinder) would help.
  2. bkal

    Stress values are more compared to experimental results and cracks are not formed on concrete for DOUBLE PUNCH TEST simulation in abaqus software

    Can you clarify how did you model an interface between steel punches and a concrete cylinder; is it as a contact, with or without friction?
  3. bkal

    Stress values are more compared to experimental results and cracks are not formed on concrete for DOUBLE PUNCH TEST simulation in abaqus software

    I would double check your CDP parameters, and apply the load as prescribed displacements, rather than a prescribed force (you can monitor total axial reaction to get an applied force). Have a look at this web site, it can create an Abaqus input deck for the concrete model given key parameters...
  4. bkal

    Numerical singularity error

    I guess it depends on what are you interested in. If it is stresses in the blade, I would start with fixing rotation in the bushing. Have youlooked inte an example from Abaqus manual: Analysis of a rotating fan using substructures and cyclic symmetry
  5. bkal

    Numerical singularity error

    Apologies if I misunderstood you, but is your blade free to rotate about the bushing connector? Could that be a problem?
  6. bkal

    Car Garage Live Load for Slab on Grade

    In the UK, we would initially look into: https://www.concretebookshop.com/tr34-4th-edition---concrete-industrial-ground-floors-a-guide-to-design-and-construction---jan2018-4188-p.asp
  7. bkal

    Column Design - concrete - Biaxial bending - Why the r/f area is not deducted from concrete area

    Could it be that, becasue of a strain compatibility and a difference in elasitc mudulus between steel and concrete, the force in concrete is almost an order of magnitude smaller than the force in steel.
  8. bkal

    Composite modal damping

    I hope this forum can help me to understand physical background / interpretation of this option to model damping in Abaqus/Standard: I tried to search the manuals for explanation of how is this implemented and how (or even if) to use this in practical applications for modelling civil structures.
  9. bkal

    Wind interference effect due to adjacent buildings

    EN 1991-1-4 states the following: 4.3.4 Large and considerably higher neighbouring structures (1) If the structure is to be located close to another structure, that is at least twice as high as the average height of its neighbouring structures, then it could be exposed (dependent on the...
  10. bkal

    Mode Selection Based on the Mode Coefficients

    I am new to Ansys (I am reasonably experienced in Abaqus and general FEA) and I am still trying to find my around the manuals. I am interested in Mode Superposition Analysis. The manual (section 3.9.6.3 Mode Selection Based on the Mode Coefficients) talks about modes selection based on...
  11. bkal

    Baseplate bending line for thickness determination

    In the UK, we would mot likely adopt a T-stub approach, which is basically a yield line approach. An example of considered yield lines is below. It would probably need to be adjusted for your application:
  12. bkal

    Stresses from ABAQUS output

    I have responded to this in Finite Element Analysis (FEA) engineering.
  13. bkal

    why I am getting stresses higher than the ultimate strength of concrete in ABAQUS?

    It is difficult to say why as you have provided little information, but one of the reasons might be that the confined concrete strength (i.e. multiaxial compression) is higher than its uniaxial strength. Depending on your boundary conditions, load application etc., you might have triaxial...
  14. bkal

    Confinement, Stirrups stresses, transverse reinfocement

    The following paper might give you some guidance, but not a ready-made solution: Theoretical Stress-Strain Model for Confined Concrete, J. B. Mander, M. J. N. Priestley and R. Park, Journal of Structural Engineering, August, 1988, ASCE
  15. bkal

    Copying from MathCAD to Word

    It is a major pain. I tend to save Mathcad / Prime into a pdf file, split it into individual pages and ten import them into Word. This works okay for short documents, but is quite a hassle for long Mathcad worksheets.
  16. bkal

    Cracks and Leak in Cinder Block Retaining Wall

    Just my curiosity ... I notice that the curved wall has all head (vertical) joints aligned. It that a common practice?
  17. bkal

    Stainless Steel Metric Grade

    This is not a comparison, but might be helpful (Table 2.1 and 2.2): Eurocode 3 - Design of steel structures - Part 1-4: General rules - Supplementary rules for stainless steels. This code refers out to EN 10088 (Structural stainless steels) and EN ISO 3506 for stainless steel bolts.
  18. bkal

    Modelling Isolators on Lusas

    I do not know much about Lusas, but generally you could model a bearing with three springs (one for each orthogonal translational direction). Hopefully, bearing manufacturer can provide their stiffness and damping properties. Unless they are large on plan, I would imagine that stiffness for...
  19. bkal

    Deep beam S&T with biaxial bending

    Thanks for your responses. centondollar - I am intrigued and puzzled by your idea to treat it as column, I cannot envisage how to do it.
  20. bkal

    Deep beam S&T with biaxial bending

    A colleague of mine is designing a deep beam using S&T method. The beam also experiences some minor axis bending and he asked me how to deal with the biaxial bending. My initial thought is to make sure not to claim same reinforcement bars twice, but apart from that I could not think of anything...

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