How do you solve a storey drift?
How do you solve a storey drift?
How is it calculated? The calculation of story drift is very simple, given the story displacements from structural analysis. In general, to find the story drift of level “X”, you would take the story displacement of level “X”, and subtract it from the story displacement of level “X-1”.
What is storey drift?
Storey drift is the lateral displacement of a floor relative to the floor below, and the storey drift ratio is the storey drift divided by the storey height.
What is the maximum storey drift allowed?
As per IS 1893, Storey drift shall not exceed 0.004 times storey height.
What is the difference between storey drift and displacement?
Storey drift is the difference of displacements between two consecutive storey’s divided by the height of that story. And Story displacement is the absolute value of displacement of the storey under action of the lateral forces. The importance of story drift is in design of partitions/ curtain walls.
How do you check inter storey drift in Etabs?
This way we can quickly check and compare seismic drifts. For the wind drifts, go to Display>Story Response Plot>Show>Max Story Drift> Select Load Combination for results. That should be less than H/400 to H/600 limit (0.0025 t0 0.00167). The values reported in ETABS are divided by story ht.
What is storey stiffness?
In this method, storey stiffness is estimated as the lateral force producing unit translational lateral deformation in that storey, with the bottom of the storey restrained from moving laterally, i.e., only translational motion of the bottom of the storey is restrained while it is free to rotate.
Why is storey drift important?
Inter-storey drift is an important parameter of structural behavior in seismic analysis of buildings. Pounding effect in building simply means collision between adjacent buildings due to earthquake load caused by out of phase vibration of adjacent buildings.
Is code for storey drift?
IS 1893
Concept: AS per IS 1893 (part 1) : 2002 CI. 7.11. 3, The storey drift in any storey due to the minimum specified design lateral force, with partial load factor of 1.0, shall not exceed 0.004 times the storey height.
How do you test for seismic drift?
What is the drift ratio?
The drift ratio is defined as the ratio of maximum lateral drift to total height of the specimen. The procedure developed by Priestley [4] relies on the ductility ratio (∆ult/∆yield) to calculate the reduction in shear strength that occurs under cyclic loading and lateral drift increase.
What is storey shear?
Storey shear factor is the ratio of the story shear force when story collapse occurs to the story shear force when total collapse occurs. Through a series of dynamic analyses, simple equations are provisionally proposed to calculate the necessary story shear safety factor that can be used to prevent story collapse.
What is drift in building?
Building story drift is the sideways deflection of the upper floor relative to the sideways deflection of the bottom floor for a given story. It can also be defined as the sideways or lateral deflection between two adjacent stories.