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  • Users: JohnnySm
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  1. JohnnySm

    Twin Beam Diaphragm

    Hi I have a pair of steel beams (twin beams) running parallel to one another. supporting the same 440mm thick brick wall over. One beam of the pair is however supporting a separate perpendicular steel beam creating a large point load. I want both beams to work together and therefore rely on a...
  2. JohnnySm

    retaining wall and shear wall interaction with slab.

    Hello, Basic few questions. scenario = basement box comprising of rc raft, RC retaining wall all the way round, ground floor flat slab. superstructure over with concrete core that spans from basement to top floor). 1. can a RC retaining wall that spans the entire perimeter of a basement with...
  3. JohnnySm

    Pile Spring Linear Constant piles - concrete core pile cap design

    Dear All, I have posted something similar previously. Currently modelling a 12 no pile cap supporting a concrete core, piles will be terminated in stiff clay. As we know in order to design the full extent of the rebar top and bottom for the pile cap and understand a more realistic distribution...
  4. JohnnySm

    Piled Raft Design - Subgrade Modulus - Pile Spring Stiffness.

    Dear All, Designing a RC piled Raft. medium dense clay of approximately 100kn/m2 CU value. Just want some friendly advice. 2 options as i see it 1. model the raft as a slab supported on a continuous set of springs. The K value (modulus of subgrade reaction) is required? No plate bearing test...
  5. JohnnySm

    Piled Wall CFA compression resistance

    Hi Everyone. I am currently developing my knowledge in geotechnical design of CFA piling. I understand the basic principles for developing shaft resistance and end bearing to create an unfactored compression resistance. However, as with the majority of basement projects Piled walls for...
  6. JohnnySm

    composite steel beam design - lateral restraint of beams - fire protection of steel beams

    Dear All. 5 storey steel frame building (residential). Steel beam with steel/concrete deck flooring kingspan or something. 1. is it sufficient to assume that if the decking trays are positioned and cut correctly, so as to ensure a trough of the deck lies on the top flange, can beams running...
  7. JohnnySm

    Composite Steel Beam Design - lateral restraint of beams - fire protection of steel beams

    Dear All. 5 storey steel frame building (residential). Steel beam with steel/concrete deck flooring kingspan or something. 1. is it sufficient to assume that if the decking trays are positioned and cut correctly, so as to ensure a trough of the deck lies on the top flange, can beams running...
  8. JohnnySm

    Group Action CFA Piles

    Dear All, Could someone please provide me with some advise on studyng pile group design (specifically CFA). I have Craigs mechanics, foundation design and construction (tomlinson) and Pile Design and construction practice Tomlinson/woodward,. Is there any further reading i should take on board...
  9. JohnnySm

    Basement Raft Heave/Hydrostatic Uplift - Pile Stiffness

    Dear All, Could someone please kindly provide me with a step by step process on how to attain the uplift pressure from a clay based subgrade on a single basement Raft and the general design procedure for such a structure? Please note this is purely educational as i am soon to be using this...
  10. JohnnySm

    Wind Loading on Inset Storeys

    Hi guys, For those who are not familiar, the current Eurocode, as far as i am aware, does not provide advice on wind load zones for top floors with inset storeys, such as the whole penthouse theme with terraces etc. Does anyone know the current criteria for calculating the wind pressures in...
  11. JohnnySm

    Basement Foundation design using Piled Ground Beam

    Hi Guys, I have a few questions regarding foundation design for a basement support structure. Please, first review the attached to familiarise yourself with the geometry/scope of my questions. The scheme, at this point is to create a basement retaining wall box structure with slab over and...
  12. JohnnySm

    3 Group Pile Cap Design

    Hi guys, I am a 1 year grad structural engineer. Getting my head around the differences of beam and truss analogy in Pile Cap design. my question is regarding the difference in rebar arrangement for 3 group pile caps designed under beam theory and strut and tie theory. Traditionally as far as...

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