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  1. qcjr

    Excentrically braced frames - How to limit link rotation

    Greetings, I am designing a 9-story building with excentrically braced frames in one direction, using the Canadian Building Code. According to the S16-01 standard (concerning steel design), the inelastic component of the link rotation is limited to 0.08 rad (for link with e < 1.6Mp/Vp). This...
  2. qcjr

    Distribution of Base Shear in a 9-story building

    Greetings, I am doing the analysis of a 9-story building using a dynamic analysis. The building is a residential complex, built using steel. In one direction, concentrically-braced frames (limited ductility) are used and in the other direction, excentrically-braced frames. In the principal...
  3. qcjr

    Punching shear of a steel HSS column through flat slab

    Hello guys, We are designing a concrete flat slab supported by steel HSS columns with plates. Basically, the contractor (who is also the client) wants to have continuous steel columns (not interrupted at each level). I have calculated the punching shear through the slab by checking the minimum...
  4. qcjr

    SAFE v12 punching shear

    Hello guys, I have a model of a flat plate, with a couple of shear walls on the perimeter. I have trying to verify the punching shear of the columns but for some reason I don't know, SAFE won't calculate the punching shear on the perimeter columns ("N/C" result). When does SAFE stop...
  5. qcjr

    When to consider active/passive state..?

    Hello all, When I design retaining walls supporting some kind of structure, I usually use the at-rest earth pressure to limit possible deflections. However, a colleague of mine came up with a question about the design of one of his walls. At what point can we consider active/passive pressures...
  6. qcjr

    Foundation subgrade modulus

    Hello all, This is a question about using springs to model a soil foundation, in a structural design software. The software uses "kN/mm" as an input value for the spring supports. I would like to know if anyone here, either by experience or with a reference, can guide me to find some typical...
  7. qcjr

    Retaining wall sliding problem

    Hello everyone, This is my first post so bear with me please :). Also, I am really sorry about using metric units (Canadian engineer here). We are designing a new building 4 m away from an existing one. Since the ground level is higher than the basement level (slab on grade) of the new...

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