Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by Roy88

  1. Roy88

    Frequency for Wind tunnel

    Hi StructureDr, There is a paper on this. Please see link below for the paper. Refer to Table 2 of the paper, there is a recommendation of structural properties for various limit state. We will provide the wind tunnel specialist with 2 set of dynamic properties. For Service - Partially...
  2. Roy88

    HIGH DISPLACEMENT IN ETABS

    Hi RohanDutt, I have opened your model. Run a modal analysis with vertical mass turned on and you will see where the huge instabilities come from. Your upper floors seems to be 150 mm thk. timber floor without any beams. Are you sure it is going to take ur 1.5 kPA SDL and 2kPA Live Load?
  3. Roy88

    Mode Shape in Etabs

    Hi Saadpervez1, When you look at eigenvalue (i.e time period or frequency) - Etabs provide them in terms of unit of time (say seconds for period and Hz for frequency) but my when displaying the mode shape in tabular form, it provides mode shape of every floor in terms of mm...Now the question...
  4. Roy88

    ETABS Dynamic Analysis Mode 1 translation, Mode 2 Rotation, Mode 3 Translation

    This is to do with poor structural framing? Do you have an eccentric core? Try to look at the difference between the centre of stiffness and centre of mass. If the eccentricity is huge, then it is not surprising the you have torsional as your dominant mode.
  5. Roy88

    Mode Shape in Etabs

    Hi Guys, I am curious why does ETABS report mode shape with units. Back in my uni day, I was constantly reminded by my professor that the mode shape is mathematically just an eigenvector...It does not have "any" real magnitude and only indicate the shape of the structure. Is there any reasons...
  6. Roy88

    Stiffness Reduction for Walls

    Hi Guys, I am sure most of us here are familiar with the stiffness modification factor stipulated in ACI 318-14. For beams and columns, the application of stiffness modifiers can be easily incorporated into ETABS analysis by modifying the respective moment of inertia. My question here is how...
See more

Part and Inventory Search

Back
Top