What are the Stability checks criteria for the High rise building?

What are the Stability checks criteria for the High rise building?

The criteria for the stability checks for the tall buildings are as follows: -


  1. Inter storey drift ratio should be less than 0.004. (Clause 7.11.1.1 of IS 1893(Part 1): 2016
  2. The maximum deflection against wind allowed is H/500. (Clause 5.4 of IS 16700:2017)
  3. Maximum deflection against EQ allowed = H/250. (Clause 5.4 of IS 16700)
  4. Maximum deflection against cantilever or any individual element allowed = span/350 or 20 mm whichever is less. (Clause 23.2.B of IS 456:2000).
  5. Guidelines for fundamental time-period = 0.1 * N (N= No of levels)
  6. No. of modes given should be given in such a way that around 95 to 98% modal participating man ratio shall be achieved. (Clause 7.7.5.2 of IS1893 (Part 1): 2016.
  7. 1st mode of vibration is preferred to be in translation mode. (Clause 5.5.1 of IS16700: 2017)
  8. If the frequency of the building is less than 1Hz then wind dynamic analysis needs to be done by considering the guest factor. (Clause 9.1 of IS875(Part 3) :2015) and for the Dynamic wind, response refers to chapter 10 of the same code describe at this point.
  9. For key elements (elements acting as transfer beams) design over strength factor of 1.5 need to be used for EQ loadings. E.g.: Load combination (Additional factor of 1.5 need to be multiplied for EQ load case for the following load combinations)
    1. 1.5D + (1.5 * 1.5) E
    2. 1.2D + 1.2 L + (1.2*1.5) E
    3. 0.9D + (1.5*1.5) E
  10. If the expansion joints are there in the building the distance of expansion joint need to be as per (Clause 7.11.03) of IS1893 Part 1-20
  11. All the structures elements need to well within the strength design limit criteria.



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