Conceptual design of a building with columns and shear walls

1.

The structure is more restrained it will be more shrinking and cracking.the floor shrinkage and cracking will be more in structure A and there will be minimum cracks in structure B and C

The shear walls can also tell wheather the floor is resistant to vibration or not.It is superior to place columns at corners of a building.so that it can minimise the cracks in the structure.

The torsion in the structure c is more because of an eccentricity and less in structure A and B when compared.

For lateral stiffness C is more laterally stiff when compared to structures A and B.The redundancy in structure A and B is more when compared to structure C because there will be eccentricity in structure c in the left side where the length of the wall 10m which cannot hold the load equally.

2.

There is a two way eccentricity in the frame given along X and Y directions.And with the stiffness the eccentricity in X is more than eccentricity in Y.

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

There will be torsional flexibility in the structure. To avoid this placing the columns at junction and providing the shear wall if necessary. 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.

3.

This type of plan is not suitable or not appropriate for normal and earthquake prone area.In sesmic region the lateral and vertical loads play important criteria because it helps in resisting the failure against the earthquake as the loads. It's better to built a wooden structure to avoid earthquake damage.

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 to maintain the structure in the earthquake prone areas.