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  • Users: cyphos168
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  1. cyphos168

    Temporary Cofferdam design - What FOS should I use?

    Hi all. I am working on a cofferdam design. Since this is a temporary structure, I am wondering if I can use FOS=1 for soil analysis as well as structural design? Thanks.
  2. cyphos168

    Area of steel per m run of concrete slab

    Hi all, I have a problem I would like to have better understanding of. Its a flat slab design supported on columns. I am using Protastructure to analyse the slab by FE method. The result is showing the contour of the top hogging reinforcement near the column. Here is a snapshot of the top...
  3. cyphos168

    Calculating shear strength of concrete to concrete interface of a concrete plug in spun pile.

    Hi, I need to calculate the capacity of a concrete plug in a spun pile to resist a push force. Tests have been conducted and written about it and published but these are actual tests to determine the shear stress at the interface by dividing the failure force kN against the surface area of the...
  4. cyphos168

    Wind load effect on Lattice Tower in MS Tower. Your thoughts.

    Hi All, I am working on a lattice tower that is 65m tall and using MS Tower to design. I have created the load tower profile and generated the wind load combinations. I proceeded to analyse the tower and this is what I noticed. 1. Tower alone without any ancillaries, the deflection of the...
  5. cyphos168

    STAADPRO gives different results

    Hi, I have setup a model of a roof truss with Staadpro. The model was code checked with Chinese code and BS code. When I place the BS code check first (Parameter 1) for the members designed under BS code and Chinese Code check (Parameter 2) for built up member (I beam), the program reported all...
  6. cyphos168

    Analysis of embedded cantilever wall in clay. Effective or total stress anlaysis?

    Hi all, in the analysis of embedded wall, I see many many example where earth pressures are calculated using effective stress. This is because the backfill material used is generally cohesionless. If the soil is of a clay nature (say stiff clay of Cu around 150kPa) where a contiguous bored pile...
  7. cyphos168

    Crack width calculation for swimming pool.

    Hi all, Need some advice on crack width requirement for swimming pool structure. The pool is located on an upper floor level. Some literature state crack width of 0.1 and 0,2 depending on the length of water tightness tests to be conducted. SO I am assuming 0.2mm being the limit of crack that...
  8. cyphos168

    Using short piles for foundation of tall structure. Any shortcoming?

    Hi, What's the general rule about using short piles for the foundation of tall building? The thing is the ground is neither good nor bad. 250mm square concrete piles only penetrated around 7m into the ground. With pile cap in place we are only looking at around 4.5m pile remaining in the ground...
  9. cyphos168

    Different shapes sheet piles with similar section modulus share the same performance in Bending?

    Hi All, Have a quick question. I am working on a sheet pile wall design. Client has SPU-IIIw sheet pile while the software I am using does not have this material in its property library. However, I can find an equivalent sheet pile which has a property close to but lower than what the client...
  10. cyphos168

    Embedded Retaining Wall - Method of design

    Hi All, I am currently doing a design of a 1050mm diameter contiguous bored pile wall. I have the option of using either LEM or LEM with Beam Elastoplastic foundation analysis. I have tried both with different results. I am trying to figure out which one is best to use as the Beam...
  11. cyphos168

    Need help to determine Section Modulus of FSPIII Sheetpile wall when sandwiched together.

    Hi all, New member here. Hope to get some help with a problem I am having. I am working on a project to design a temporary shoring for an embankment using FSP III sheet pile wall. The wall is 5m exposed facing. Using Deepex software to anaylse I managed to get the design to work except the...

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