Large Shear Force in the beams connecting shear wall and column

[AniMhj]

Dear everyone,
I am modelling a ten storied building with beams, columns and shear walls in ETABS. The building has core shear wall system. The beam connecting the core shear wall and column is failing in shear. The length of this beam is 2 meter. Increasing the size of beam causes the increase in shear force in beam and thus fails in shear. What is the possible solution for this situation?

 

[HDStructural]

Is this happening at all levels or only one?

 

[AniMhj]

Yes, the beams are failing in all floor levels.

 

[EZBuilding]

The beam is coupling the column and the shear wall in resisting lateral forces.

A couple of options to consider to reduce this behavior:
- Apply the stiffness modifiers per ACI to account for the differential cracking of these elements (reduces stiffness of beam relative to column and shear wall)
- Reduce the depth of the beam (reduces stiffness of beam relative to column and shear wall)
- Relocate the column away from the shear wall (reduces the stiffness of the coupled system)
- If the column and beam are steel - provide a shear connection only and provide end releases in your analysis model to match that assembly

 

[HDStructural]

Agreed with EZBuilding