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  1. cecil123

    Fire Resistance:composite sections

    I have a concrete filled hollow steel section incorporating an I section inside it. Now, I want to determine the temperature distribution throughout the section when the column is heated on all 4 sides for a rating R60 (6o minutes duration of fire) I do not want to take up FE thermal analysis...
  2. cecil123

    Composite column:Fire resistance

    Is it anyways related to the difference in thermal conductivity between steel and concrete?Because steel has very high thermal conductivity and concrete comparatively low?
  3. cecil123

    Composite column:Fire resistance

    Let us say i have a composite column section consisting of structural steel, concrete and reinforcing steel. Under fire, as per eurocode, we need to divide the column section into various layers and get the temperature in every layer. What is the reason that the temmperature in every layer...
  4. cecil123

    Load introduction:composite columns

    Yes, i do have the above handbook , but for shear connectors in areas of load introduction, no examples are given
  5. cecil123

    Load introduction:composite columns

    I need to design shear connectors in regions of load introduction for composite columns.I am referring Eurocode4 for the purpose.Am looking for some solved examples for the purpose to make sure am applying the codal provisions correctly.Can anyone help me with this??Please , very very urgent!!
  6. cecil123

    Creep Coefficient

    Yes,very sure.For calculating the effective flexural stiffness considering long term effects we add the stiffnesses of the components i.e. the structural steel,concrete and reinforcing steel. In case of concrete the code requires to modify "E" value in the expression.This "E" considering long...
  7. cecil123

    Creep Coefficient

    No, i need the perimeter.The code defines a variable "ho" , it says that "ho" is the notional size of the member and, ho= (2Ac /u) , where, Ac is the cross sectional area of the member (the member is a column in my case) and "u" is the perimeter of the member in contact with the atmosphere...
  8. cecil123

    Creep Coefficient

    It is a rectangular shape column, cross sectional area "A" and length "L"?
  9. cecil123

    Creep Coefficient

    For calculating the creep coefficient as per Eurocode2, I need the perimeter of the member in contact with the atmosphere(denoted by "u") If the area of cross section of the member is "A". Length of the member (member is a column)is "L", what should be the perimeter "u".Should it be "4 x L"...
  10. cecil123

    Composite Columns

    For a concrete encased hollow circular steel section (compposite section), the Eurocode4 says that its section axial resistance may be enhanced to the effect of confining provided the non-dimensional slenderness(which is the ratio of plastic resistance to axial compression to the elastic...
  11. cecil123

    Composite Column Design:Shear resistance

    For a composite column section: The design shear resistance (?RD) due to chemical bond and friction is limited to the following values (as per the EuroCode4): 1)For fully concrete encased I sections: 0.6 N/mm2 2)For concrete filled hollow sections: 0.4 N/mm2 3)For flanges in partially I...
  12. cecil123

    Concrete Encased Hollow Circular Steel Section

    Then, supposing the column is taller(thus becoming slender) , then does it mean that the effect of restraining due to Poissons effect will be there? Plz help!!
  13. cecil123

    Concrete Encased Hollow Circular Steel Section

    For a concrete encased hollow circular steel section (compposite section), the Eurocode4 says that its section axial resistance may be enhanced to the effect of confining provided the non-dimensional slenderness(which is the ratio of plastic resistance to axial compression to the elastic...
  14. cecil123

    Interaction Curves:Composite Column Sections

    Thanks for the replies.Anyone read the material "Composite Column Design to EuroCode4" published by "Steel Construction Institute"? I have some queries in regard to Appendix B of this material??
  15. cecil123

    Interaction Curves:Composite Column Sections

    I need to develop Interaction curves for composite column sections(symmetrical sections).Have been going through the EC4 but unable to get the logic?Can anyone help me?Urgent!!
  16. cecil123

    Composite Column Design

    Though I have designed reinforced concrete columns and some steel columns in the past, am relatively new to composite column design.Currently getting familiar with Euro code(EC4) provisions.Have the following questions: 1.Why is that the effect of long term loading is taken into account only if...
  17. cecil123

    PT Slab: Ultimate Moment Capacity check

    Thank you for the response.Yes, I want to do that.I have started for the Indian code, but for the British code I need the stress strain curves for concrete and steel and the relevant equations formulating these curves.Can you help me where I could find these stress strain curves and the...
  18. cecil123

    PT Slab: Ultimate Moment Capacity check

    I have been designing a PT Slab and am using hand computations first to get more involved and familiarised with the design procedure. I am using BS Code and the Concrete society handbook on Post-Tensioned Concrete Floors.I have the following questions: 1. I have computed losses and have...
  19. cecil123

    PT Slab Design

    If the final effective force, I have is after the consideration of losses, then can this force be use as the product of (fpu * Aps)?
  20. cecil123

    PT Slab Design

    Awaiting some response!! Please help!!!

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