Conceptual design of a building with columns and shear walls

1.

TYPE-1:
The four shear walls are symmetrically placed and are in uniform size. Because of this there will be uniform distribution of seismic forces.
Walls are placed in L shape. Because of these heavy biaxial stresses will be imposed on them, due to this the floor below the walls will undergo heavy
deformation.
Lateral stiffness is higher.
Torsional stiffness is higher.
Redundance will be higher than other two types.
TYPE-2:
The four shear walls are symmetrically placed and are in uniform size. Because of this there will be uniform distribution of seismic forces.
Walls are symmetrically placed, therefore there will be no heavy floor shrinkage for these as they are regularly placed and are safe.
Lateral stiffness is less as stresses are less.
Torsional stiffness will be lesser.
Redundancy will be lesser than other two types.
TYPE-3:
Walls are dissimilar and non-symmetric. In this case, the walls which are stronger will yield first and impose rest on their deflection pattern on the other.
Walls are unsymmetrical. There will be heavy deformation under the large wall, which is 10m, which is heavier than the other two walls. Because of this floor
shrinkage will be higher at this wall.
Lateral stiffness is higher for the heavier wall compared to the other two.
Torsional stiffness is higher.
Redundance will be higher than the type 2 but lesser than the type 1.

2.

All the frames are not symmetrical and continuous which is basically not considered from the earthquake point of view due to lack of redundancy and
eccentricity and may be suffer from the load irregularities.
Beam B is supported at only one end by column and the other end is supported by the other beam which is not permissible.
Only in X-direction of B , B and in Y-direction of B , B the beams are continuous and are connected by the columns at the joints.
C and B centres should coincide, if not, it will lead to torsion.
Translation mode of vibration is due to discontinuity and irregularity of frames. Hence there are two sources of damage for translation mode as there are two
frames which are irregular.
Rotational mode of vibration is due to the torsional flexibility. Hence there is one source of damage for rotational mode as there is one room not in pace with
the other rooms.
So, for this plan, fundamental translational mode of vibration is higher than the fundamental rotational mode of vibration.

3.

A multi-storey building with basement, with a quadrilateral (non symmetrical floor plan) plan as, has interior columns in an irregular (not in a grid) pattern in plan that serves architectural and functional considerations. Partition walls and interior beams supporting the slab have different layout in different stories. However, there is no constraint to the type, location and size of the lateral force resisting components and sub-systems on the perimeter. Proposals are to be made and justified for the choice of the lateral-load-resisting system and its foundation.

The bottom three beams can be provided with the continuous beams. Whereas top and side columns can be provided with arch forms.
As it is given, slab can be placed according to the layout.