Based on the common sense, the shear wall and structure columns could be coexisted most of time for a highrise. But I here have a twisted question. My most structure is using shear wall which is located even in the building perimeter, just some area using concrete columns to provide the more flexible space.
Is this the reasonable approach?
A concrete column and a shearwall could not only coexist but shouldn't they be integral? You would typically want to run a shearwall between 2 columns on your grid. I guess I am wondering why you have a shearwall on the perimeter of a high-rise building. Usually you would use the elevator and stairwell walls within the core of the building as your shearwalls in this type of building.
If you are looking to get lateral force resistance at the perimeter of a highrise you might try actually incorporating it into your design. Try exposing the structure as part of the exterior facade. Rather than using a traditional shearwall on the exterior think of it working as a truss that is vertically cantilevered out of the ground-this is how the system would actually work when loaded laterally. So thinking of it like that you wouldn't neccessarily need a solid shearwall, you could also use some sort of articulated truss design.
Hope that helps, I'm not sure if I understood the question exactly.
IF you have a moment frame, which you probably do in a steel or concrete highrise, there really shouldnt be much of a need for shear walls. Like the above post, your core should provide a great deal of shear. Also, you can use diagonal members to create a more rigid frame on the exterior of the building
this is a around 30 story high building. So the engineer designed to use the sheer wall( or irregular column) in all the necessary area. In the meantime, the befenits for using irregular columns is that it will make the space clean no column stand out.
Sorry for my limited structure knowledge. That's what I know so far.
Is this common practice for a building around 30 stories?
shear wall at around the perimeter is not so good practice architecturally, meaning not much opennings for windows.
sometimes structural engineer do things at their convenience without much thoughts of the architectural implications... its about time u start telling him what u want and he follows!!
To be fair you did ask if this was a reasonable approach, which with building technology these days, it isn't.
The benefits of a concrete structure are such that the moment resisting joints usually eliminate the need for massive shear structures. I am surprised that a 30 storey 'tower'(?) is being done entirely in concrete as the programme and weight issues usually prevent this in my experience (others may disagree it depends on which country and field you are working in).
As others have said the usual method is to use reinforced concrete cores at the centre of the structure to brace the buidling against horizontal loads.
If we assume that the frame is steel and the cores are not solid, then there would be a serious argument for shear walls. Your only other option at that stage would be diagonal bracing, but this has it's own special problems. The shear wall would at least allow some openings through it.
As an aside I have seen steel sheet bracing used on commercial buildings to reduce the intrusion into the wall thickness.
Mar 14, 07 9:42 am ·
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Can structure column and shear wall coexist together for a highrise?
Based on the common sense, the shear wall and structure columns could be coexisted most of time for a highrise. But I here have a twisted question. My most structure is using shear wall which is located even in the building perimeter, just some area using concrete columns to provide the more flexible space.
Is this the reasonable approach?
Thanks a million in advance for your help.
A concrete column and a shearwall could not only coexist but shouldn't they be integral? You would typically want to run a shearwall between 2 columns on your grid. I guess I am wondering why you have a shearwall on the perimeter of a high-rise building. Usually you would use the elevator and stairwell walls within the core of the building as your shearwalls in this type of building.
If you are looking to get lateral force resistance at the perimeter of a highrise you might try actually incorporating it into your design. Try exposing the structure as part of the exterior facade. Rather than using a traditional shearwall on the exterior think of it working as a truss that is vertically cantilevered out of the ground-this is how the system would actually work when loaded laterally. So thinking of it like that you wouldn't neccessarily need a solid shearwall, you could also use some sort of articulated truss design.
Hope that helps, I'm not sure if I understood the question exactly.
IF you have a moment frame, which you probably do in a steel or concrete highrise, there really shouldnt be much of a need for shear walls. Like the above post, your core should provide a great deal of shear. Also, you can use diagonal members to create a more rigid frame on the exterior of the building
this is a around 30 story high building. So the engineer designed to use the sheer wall( or irregular column) in all the necessary area. In the meantime, the befenits for using irregular columns is that it will make the space clean no column stand out.
Sorry for my limited structure knowledge. That's what I know so far.
Is this common practice for a building around 30 stories?
shear wall at around the perimeter is not so good practice architecturally, meaning not much opennings for windows.
sometimes structural engineer do things at their convenience without much thoughts of the architectural implications... its about time u start telling him what u want and he follows!!
"shear wall at around the perimeter is not so good practice architecturally, meaning not much opennings for windows."
That is right. Thank you! I have no choice now since it have been decided.
To be fair you did ask if this was a reasonable approach, which with building technology these days, it isn't.
The benefits of a concrete structure are such that the moment resisting joints usually eliminate the need for massive shear structures. I am surprised that a 30 storey 'tower'(?) is being done entirely in concrete as the programme and weight issues usually prevent this in my experience (others may disagree it depends on which country and field you are working in).
As others have said the usual method is to use reinforced concrete cores at the centre of the structure to brace the buidling against horizontal loads.
If we assume that the frame is steel and the cores are not solid, then there would be a serious argument for shear walls. Your only other option at that stage would be diagonal bracing, but this has it's own special problems. The shear wall would at least allow some openings through it.
As an aside I have seen steel sheet bracing used on commercial buildings to reduce the intrusion into the wall thickness.
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