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  1. jsmatte

    Assign different ground motions to specific nodes in SAP2000

    Hi, I was wondering if it was possible to select nodes to input different ground motions in SAP2000. From what I understand, SAP2000 inputs the ground motion only at ground joints. However, I am looking at a building with a basement and would like to account for the fact that the ground motion...
  2. jsmatte

    How does SAP2000 compute the moment of inertia of floor diaphragms about the vertical axis

    I would also like to know what are the units of the output txt files... if anyone knows
  3. jsmatte

    How does SAP2000 compute the moment of inertia of floor diaphragms about the vertical axis

    Does anyone know how SAP2000 compute the moment of inertia of floor diaphragms about the vertical axis passing through the center of mass? I am writing a code to analyse different structural configurations and I am comparing the results with those obtained in SAP2000. For the mass matrix, I have...
  4. jsmatte

    Mass eccentricity

    @TLHS, indeed, this is a condition upon which a structure can be classified as an irregular structure and have the restriction of not being able to be analysed with the ELF method. And the point you are bringing by mentionning the ELF method is very good as it was the answer I am looking for...
  5. jsmatte

    Mass eccentricity

    I agree, but in the case of structures with setback (stepped structures) the centers of mass of the two parts of the strucutre do not have the same location. it is therefore an important parameter to consider if you are looking at the seismic behaviour of the structure. I am just wondering how...
  6. jsmatte

    Mass eccentricity

    Anyone ever heard of studies made on structures with mass eccentricity, i.e. the center of mass of adjaent floors do not have the same location???
  7. jsmatte

    Panel Zone Properties

    Anyone knows how the propertiees for panel zones are obtained when assigning panel zones to a joint (Assign > Joint > Panel Zones > Elastic Properties from column)? Is it based on the simple model proposed by Krawinkler? I cannot find any info about that in either the reference manuals or the...
  8. jsmatte

    Composite floor modeling in SAP2000

    Thanks for the reply Dart82, but I am wondering, how can you add joints to a frame element without breaking it into multiple elements. If you break a frame element into multiple elements, then sap2000 will consider each little element independently, and not as multiple elements forming a big...
  9. jsmatte

    Composite floor modeling in SAP2000

    Hi everyone, I am currently working on a steel building with composite floors. My problem is that I don't know how to model the connection between the steel beam and the concrete slab (i.e. modelling the shear studs). Even if I put any constraint to the floor joints, SAP2000 does not consider...

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