Conceptual design of a building with columns and shear walls

1 Answer

Aim:To Comment on the structures given above with respect to the static eccentricity, the system’s redundancy, foundation systems, architectural constraints

As the structure is more restrained it will be more shrinking, expanding and cracking

There will be more floor shrinkage and expanding in structure A where as there will be minimum cracks in structure B and C

The shear walls in the structure also decide whether the floor vibration is more or less in the structure it will be better placing a column at the corners so that it will reduce the cracks instead of having a shear walls at the corner in the structure

The Torsion in the structure C is more when compared to structure A and B because in the structure C there will be an eccentricity

The redundancy in structure A and B is more when compared to structure C because there will be an eccentricity in structure C in the left side where the length of the wall 10 metre which cannot carry load equally in either direction

For Lateral stiffness structure C is more laterally stiff when compared to the structure A and structure B because because there will be an eccentricity in structure C in the left side where the length of the wall 10 metre which cannot carry load equally in either direction

2 Answer

Aim:Discussing the suitability for earthquake resistance of the moment resisting frame

There is a two way eccentricity in the frame along X direction and Y direction also with stiffness the eccentricity in X direction is larger when compared to Y direction

There is only two continuous frames in the structure that is B1 and B2 in the X direction and B9,B10 and B11,B12 in the Y direction and all other beams are broken at the midway in the frame

There will be Torsional flexibilty in the structure

Since to avoid torsional restraints its better to make the room dimensions even in both X and Y direction and placing the columns at the junction of two wall if its feasible its better to provide shear wall at appropriate location

The fundamental translation mode of vibration is larger than the fundamental torsional mode of vibration

3 Answer

Aim:To comment on the Column layout which is irregular pattern in plan

The above plan that is given above is totally unsuitable for normal areas and also in Earthquake prone area

In seismic region the lateral and vertical loads plays an important criteria because it helps in resisting the failure against the earthquake as the loads resultant will not co inside with the center of the mass of the structure it becomes eccentric and not suitable for any type of areas

In the above question the interior beams are supported by the slabs in general the interior column and the interior Beam at different location is irregular in plan and are continuous and is disallowed to resist the seismic load in the region

In this plan a flat slab is more appropriate than a regular beam column junction as it provides support to the columns without any provision of the beam which reduces the weight of the building and also helps in the ductility which indirectly helps to maintain the structure in the the earthquake prone areas

In this plan apart from flab slab a wooden structure is also appropriate which reduces the weight of the building and also helps to maintain the structure in the the earthquake prone areas