18- ASCE-7 Equivalent Lateral Force (ELF) Method-Vertical Distribution of Seismic Force

Equivalent Lateral Force (ELF) Method
Seismic Response Coefficient
Vertical Distribution of Seismic Force
Contents of the video:
Code section for base shear
The rationale of the Seismic Response Coefficient
Example for base shear
Vertical Distribution of Seismic Force
Example Vertical Distribution of Seismic Force

[@MadhuparnaSinha]

Sir thank you so much for sharing this video. I have a request to you: Could you please share the slides of your lectures? It will be really helpful. Thank you.

[@haseeburrehman4352]

Nice sir

[@wazir252]

What are the situations where we cannot apply ELF procedure in buildings?

[@shazebmirza9336]

ELF is static procedure in its nature, it utilizes the height of the structure and distribute forces in inverse triangle manner . It does not consider the Mass proportion of the structure( Response spectrum method does). e.g if there is irregularity of mass in bottom storeys lets say it is a library or storage e.t.c , ELF will not consider that irregularity in mass. ( but it should according to F=ma) and will distribute the forces. Whereas RSA is dynamic in natures and utilizes Mass portions y Modal Mass analysis.......ELF should be used in Symmetrical and Regular structures .

[@shazebmirza9336]

ELF uses Wx = total seismic weight.

[@shazebmirza9336]

to be consulted

[@wazir252]

Thank you Sir! it is realy a big concept in small easy sentances.