Conceptual design of a building with columns and shear walls

Criteria		A	B	C
Restraint of Floor shrinkage	Observation	Full restraints at all corners	corners are left free but restrains along the edge	Non - uniform restrains
	Conclusion	it will have higher restrains to shrinkage thus lead to crack in the floor	it is average	it will not efficient restrain the shrinkage so possibly less cracks
The Lateral stiffness	Observation	Comparatively lower lateral stiffness in both x and y axis	Uniform and comparatively higher later stiffness in both x and y direction	Non uniform lateral stiffness in both x and y
	Conclusion	it is comparatively low	it will provide higher lateral stiffness for a pure seismic acceleration in x and y direction	it is comparatively low
Torsion with respect to vertical axis	Observation	corner wall provide more resistance to twist	Edge walls provide good resistance to twist	irregular wall provide very poor resistance to twist
	Conclusion	it has best then the others	it is average	it is the worst one
Vertical reinforcement for similar base capacity	Observation	Walls are subjected to normal flextural moment and heavy twisting moment	walls are subjected to nominal twisting moment	walls are subjected to heavy flextural moment and twisting moments
	Conclusion	It has average requirement	it is least requirement	it need the most requirement

Criteria		A	B	C
Static eccentricity	Observation	Structuraly symmetric	Structurally symmetric	un symmteric
	Conclusion	No static eccentricity	No static eccentricity	It has static eccentricity and significant
Sysrem's redundancy	Observation	Uniform placement of lateral load support in both the axes	Uniform placement of lateral load support in both the axes	concentrated lateral load support in both the axes
	Conclusion	It is more reduadant	It is more reduadant	It is less redundant
Foundation system	Observation	Due to 'L' shaped walls the geometry of foundation and its design will be critical	walls are in line easy to fix the geometry and design of foundation	walls are in line & concentrated easy to fix the geometry of foundation but critical in design
	Conclusion	It is recommended to have perpheral box foundation	It shall be incorpated with isolated footing / strip footings	It shall be incorpated with isolated footing / strip footings
Architectural	Observation	walls obstruct only corners	walls obstruct the faces of building	Vertical wall will not allow passage
	Conclusion	It is preferred one	Objected to discussion	Will not be accepted both architectural and commercially

Q2.

Indirection lateral load transfer in X and Y direction

The beams are connecting to another beams which is inefficient during lateral load transfer. In such conditions the primary beam is prone to shear failure

Eccentricity:

The longer the distance between center of mass and center of stiffness , the higher torsional moment of the building as per the given plan eccentricity , the building is subjected to higher torsional moment in both X and Y direction.

Strong beam weak column possibility:

The size of column majorly mentioned as 25 cm * 25 cm . But all the beam have much deeper section (50 cm). Inertia of the beam is visually higher than column.If the column reinforcement is adequately greater than that of beam,we are okay and since we do not have the reinforcement detail.thisis doubtful. It is recommened to have slight bigger sizes for column.

Q3.

Floor plan:

The floor plan of building is not either uniform or symmetric. So naturally any lateral load induced in the floor will not have 100% influence in same direction. Definitely a special lateral load resisting system for these torsional moments should be accommodated.

Random Internal columns:

Since the internal columns are random,they are unable to transfer lateral laods efficiently and can not achieve desirable building response.So we have to assume and design those columns for only gravity loads.

Floor to floor variations in Partition walls and Beams :

Partition walls provide an important mass control in building and beams play key role in shear transfer fromm floor to beam.All these elements are not in order.So heavy distortion and distribution of lateral loads will happens.