The effect of design drift limit on the seismic performance of concrete tall buildings

What is it about?

Current building codes aim to ensure the acceptable performance of structures implicitly. Since these provisions are empirically developed for low to medium-rise buildings, their applicability to high-rise building needs further investigation. This paper studies the effect of design drift limit on the seismic performance of RC dual high-rise buildings.The study results show that the design drift limit affects the buildings seismic performance and such effect depends on the performance level considered. Also considering collapse limit state, larger design drift limit does not induce significantly higher risk and might yield a more cost-effective design.

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Why is it important?

1- We have shown how design drift affects tall building behavior quantitatively. to the best knowledge of the authors, this has not been done to date. 2-The structural engineering community is revisiting tall building design since they are traditionally designed following the same procedure as low-rise buildings. We have shown that a higher drift limit (than low-rise building) can be suitable, confirming that the design of tall buildings are different and should not follow the same procedure as low-rise ones.