Concept on positioning of Columns

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INVESTIGATION OF THE FRAMING PLAN WITH RESPECT TO SYMMETRY IN X-DIRECTION:

IF WE SPLIT THE PLAN VERTICALLY HALF IT WILL LOOK MIRRORED SO WE CONCLUDE THE GIVEN PLAN IS SYMMETRIC IN X-DIRECTION.

INVESTIGATION OF THE FRAMING PLAN WITH RESPECT TO SYMMETRY IN Y-DIRECTION:

IF WE SPLIT THE PLAN HORIZONTALLY HALF IT WILL LOOK MIRRORED SO WE CONCLUDE THE GIVEN PLAN IS SYMMETRIC IN Y-DIRECTION.

INVESTIGATION OF THE FRAMING PLAN WITH RESPECT TO REDUNDANCY IN X-DIRECTION:

THE COLUMN IN X DIRECTION ARE COMPARATIVELY MORE AND EVENLY SPACED.SO THE STRUCTURE IS MORE REDUNDANT IN X DIRECTION.EXCEPT THE TOP AND BOTTOM COLUMN ROWS ARE HAVING QUITE LONGER SPANS.

INVESTIGATION OF THE FRAMING PLAN WITH RESPECT TO REDUNANCY IN Y-DIRECTION:

THE COLUMN IN Y- DIRECTION ARE COMPARATIVELY LESSER BUT EVENLY SPACED.SO THE STRUCTURE IS REDUNDANT BUT LESSER THAN THAT OF IN X DIRECTION.

INVESTIGATION WITH RESPECT TO BI-DIRECTIONAL STIFFNESS:

THE COLUMNS IN HORIZONTAL DIRECTION ARE CONNECTED WITH STRAIGHT TO STRAIGHT BEAMS. THIS MEANS ANY LATERAL LOAD PASSING FROM LEFT ED OF THE BUILDING WILL HAVE ITS PATH STRAIGHT TILL IT REACHES RIGHT END OF THE BUILDING.SO NO OR LESS POSSIBILITY OF FORCE DIVERSION TAKES PLACE.

THE COLUMNS IN VERTICAL DIRECTION ARE NOT CONNECTED WITH STRAIGHT TO STRAIGHT BEAMS SO A LATERAL LOAD PASSING FROM SOUTH SIDE OF BUILDING WILL GET DIVERTED TO EAST & WEST DIRECTION TO REACH NEXT DAY.

THERE WILL BE MAJOR FORCE DIVERSION TAKE PLACE WITH SEISMIC FORCE IN Y-DIRECTION THE FRAMING PLAN IS WEAK WITH RESPECT TO BI-DIRECTIONAL STIFFNESS IN Y DIRECTION.

INVESTIGATION OF THE FRAMING PLAN WITH RESPECT TO DUCTILITY:

PRIMA FACIE THE ASPECT RATIO OF THE PLAN CLEARLY HINTS MORE COLUN IN X-DIRECTIONCOMPARED TO Y-DIRECTION.IT WILL RESULT IN HIGHER STIFFNESS OF THE BUILDING IN X-DIRECTION WHICH WOULD REDUCE DUCTILLITY IN X-AXIS.

MOREOVER THE X-FORCE WILL EASILY PASS FROM ONE BAY TO ITS NEXT DUE TO BEAM ALIGNMENT WHEREAS THE Y-FORCE WILL STRUGGLE TO PASS THROUGH THE NORTH SOUTH BEAM ARE ARRANGED IN ZIG-ZAG WHICH LEADS TO A DISCONTINUOUS BRACING.

WE CAN CONCLUDE THAT THE GIVEN FRAMING PLAN IS MORE DUCTILE IN Y-DIRECTION THEN THAT OF IN X-DIRECTION.

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VERTICAL IRREGULARITY:

THE BUILDING PLAN AREA IA LARGE IN BOTTOM STORIES THE FLOOR PLAN AREAS ARE GETTING REDUCED WITH INCREASE IN HEIGHT.THESE BUILDING OFFSET HAS TO BE CROSSCHECKED WITH REFERENCE TO IS-1893-2016 TABLE-6 SERIAL NUMBER(iii).

SOFT STORY:

THE BUILDING HAS UNCOVERED OPENING SPACE IN 6th FLOOR.AS THERE IS NO OCCUPANCY OR A PARTITION WALL THIS WILL LEAD TO PLASTIC HINGE FORMATION AT THE COLUMNS.THIS HAS TO BE CHECKED AND SUFFICIENTLY DESIGNED.

SLOPY BASE:

THE BUILDING IS CONSTRUCTED ON A SLOPING GROUND AT ONE SIDE. THIS WILL LEAD TO SIGNIFICANT VARIATIONS IN THE STIFFNESS. FEW LEVELS MAY BE SUBJECTED TO SOFT STORY MECHANISM.

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OPEN GROUND FLOOR:

THIS DENOTES SOFT STORY MECHANISM ACTING IN THE BUILDING.

ROOMS ALONG 2 BAYS SEPARATED BY AN OPEN CORRIDER:

THE BAYS FILLED WITH ROOMS WILL HAVE HIGHER MASS COMPARED TO THE MIDDLE BAY LEFT OPEN FOR CORRIDOR.THIS INCLUDE MASS IRREGULARITY ALONG HEIGHT UNIFORMLY.

TWO SHORT SIDES COVERED WITH INFILL WALLS:

THIS MEANS THE BUILDING LEFT AND RIGHT SIDES PERIPHERY IS MORE STIFFER DURING SEISMIC FORCES.

STAIRCASE PORTION AT LEFT TOP CORNER:

USUALLY STAIRCASE AND LIFT PORTIONS ARE STIFFER THAN OTHER PARTS BECAUSE OF CONCENTRATED CONCRETE ELEMENTS SO THE STAIRCASE PORTION CONTAINS MORE STIFFNESS IN THE PROVIDED BUILDING PLAN.

NO FRAMING CONNECTION ALONG Y-DIRECTION:

WE COULD SEE NO STRUCTURAL BEAMS PROVIED ALONG THE VERTICAL DIRECTION BETWEEN COLUMNS.THIS MAKES THE BUILDING MORE VULNERABLE DURING THE NORTH SOUTH SEISMIC FORCE.

BEAMS CONNECTED ALONG COLUMN MINOR AXES:

THE COLUMN ARE HAVING LONGER DIMENSION IN Y-DIRECTION THIS MEANS THEY ARE MORE STIFFER ALONG Y-DIRECTION BUT THE BEAMS ARE RUNNING ONLY ALONG X-DIRECTION WHICH WOULD ATTRACT MUCH LESSER LATERAL FORCES AND HARDLY TRANSFERS IT.

VARIATION IN COLUMN SIZE:

THE INTERNAL COLUMN ARE HAVING HIGHER SIZES COMPARED TO EXTERIOR COLUMNS.BUT THIS WILL LEADS TO SIGNIFICANT DIFFERANCE IN LATERAL DRIFT OF COLUMN SO THE CONCRETE FLOOR MIGHT HAVE SUFFERED HEAVY OUT OF PLANE SHEAR WHICH WOULD LED TO COLLAPSE.