The document summarizes the analysis and design of a multi-story institutional building with hollow core slabs. It discusses using Staad.Pro software to analyze and design the building's hollow core slabs, beams, columns, footings, and stairs. The production process of hollow core slabs is also outlined, including bed preparation, stressing strands, casting, curing, transport, and erection. Key activities to be performed include calculating loads, designing hollow core slabs, connecting slab panels, designing beams and columns, and designing footings.

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Structural Analysis and Design of
Institutional Building with Hollow Core Slab

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OBJECTIVE
• To analyze and design a
multi –storey Institutional
building with hollow core
slab.
• Analysis and design is done
with the aid of Staad.pro
Software.

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STAAD.Pro
Software used for the analysis
and design of the building.
AUTOCAD 2016
Used for drafting and detailing
of the designed structural
elements

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PRESTRESSED CONCRETE
What is prestressed concrete?
○ Prestressed concrete is a type of concrete in
which internal stresses are induced to
counteract extract stresses.
○ Prestressing is a method in which compression
force is applied to the reinforced concrete
section.
○ The effect of prestressing is to reduce the tensile
stress in the section to the point till the tensile
stress is below the cracking stress. Thus the
concrete does not crack.

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METHODFORPRETENSIONING

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PRESTRESSING OF CONCRETE

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Hollow Core
Slab
• Hollow core slab is a precast,
or a prestressed concrete
component having holes and
strands
• It is also called as a Voided
Slab
• HCS units are the most useful
elements of floor construction
in multi-storey building &
residential apartments.

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SITE DETAILS
• G+6 Institutional building
• Site is located at Darussalam,
Nampally.
• Plot Area: 2742 Sq. mt
• Ground: 11713 Sq. mt
• Total height: 28.2 mt

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DESIGNING FEATURES
SLABS BEAMS COLUMNS STAIR
CASE
FOUNDATION

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HOLLOW
CORE SLAB
A hollow core slab refers to a
precast slab that is prepared
using pre stressed concrete.
Benefits include
○ It is generally used in the
construction of floors for high rise
apartments or multi storey
buildings.
○ They consume lesser raw material
& possess higher concrete strength,
are structurally efficient, have
reduced thickness.
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ADVANTAGES OF HOLLOW CORE SLAB
• Remarkably lower price
when compared to other
• Longer span & greater
loads than conventional
slabs of the same thickness.
• No need for scaffolding
• Speed and ease of
construction
• High strength
• Light weight and durable
• Fire Resistance and sound
insulation
• Reduced on site labor
• Prefinished ceilings
• construction
• Preexisting longitudinal
holes that can be used as
conduits.

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Production Process Of
Hollow core Slab
Bed Preparation
Stressing the strands
Casting
Storage and Curing
Transportation to site
Erection

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BED PREPARATION
• The Pre stressing steel
beds are cleaned
thoroughly & slightly
oiled to allow easy
stripping
• Steel strands are then
laid & fixed at both ends

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STRESSING OF STRANDS
• The strands are stressed
one by one, under strict
quality control.
• The stressing forces, no.
of strands & their
position are all
determined by slab
design

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CASTING AND AUTOMATIC EXTRUSION
• In order to meet the
durability & strength for
slab, top quality concrete
is batched & transported
to extruder.
• which compacts it, then
extrudes the hollow core
section continuously.

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Detensioning and CuttingDETENSIONING AND CUTTING
• 18 hrs later, when quality
checks confirm that
required concrete
strength has been
reached, strands are
detensioned.
• PSC concrete bed is cut
into different elements
according to design.

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STORAGE AND CURING
• Hollow core slabs are
then stored & cured in
the yard according to
quality procedures & up
to the specified time.

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TRANSPORTATION TO SITE
• Transport is done by
flat trailers, with slabs
stacked horizontally,
supported by timber
planks & well secured
to avoid transport
damage.

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ERECTION
• Hollow core slabs are
lifted from the trailers on
site by a special spreader
beam and lifting belts.
• Up to 600 sq. mt. of
Hollow core slabs can be
erected by one team in
one day making it fastest
system available

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REALWORLDEXAMPLE

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○ A beam is a
structural element
that is capable of
withstanding load
primarily by
resisting against
bending
○ Main function of
the beams are to
transfer loads from
the structure onto
columns and
foundation
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BEAMS

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TYPES OF BEAMS
• Cantilever beams
• Simple beams/fixed
beams
• Overhanging beams

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CROSS-SECTION OF A BEAM

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REAL WORLD PICTURES

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COLUMNS
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• A structural
member subjected
to axial
compressive forces
is called a column
• Normally, columns
carry heavy
compressive loads
• Columns are used
in concrete and
steel buildings.

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TYPES OF COLUMNS
○Long Columns
When the length of column
is more as compared to its
c/s area
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○Short columns
When the length of column
is less than compared to its
c/s area, it is called as strut
○Intermediate
Length of column is
between 4d<L<30d

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○A stair is a system of
steps by which people
and objects may pass
from one level of a
building to another level
○It divides the large
vertical distance into
number of part
distances called as steps
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STAIRCASE

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Parts of Staircase:
1. Step
2. Tread
3. Rise
4. Handrail
5. Baluster
6. Newel Post
7. Run
8. Nosing
9. String or Stingers

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Types of Staircase
Straight
Staircase
Dog Legged
Staircase
Quarter Turn
Staircase
Open Newel
Staircase

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Three Quarter
Turn Staircase
Bifurcated
Staircase
Geometrical
Staircase
Circular
Staircase

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CROSS-SECTION OF STAIRCASE

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○Footings are structural
members used to
support columns and
walls to transmit and
distribute their load
onto the ground
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FOOTINGS

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Types of Footings
Wall Footing Isolated Footing Combined Footing

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Mat Footing Pile Footing

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CROSS-SECTION OF AN ISOLATED FOOTING

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TYPES OF FOOTINGS

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REAL WORLD PICTURES

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ACTIVITIES TO BE
PERFORMED

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Calculation of load, bending
moments and shear forces
Designing of HCS, beams,
columns and footings
Drawing of detailed
structure
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ANALYSIS DESIGNING DRAWING

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ACTIVITY-1
IDENTIFICATION OF SLAB PANEL
• Depending on the
project requirements,
in particular span and
loading performance
the most adequate
and economical slab
is selected.

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Hollow core slabs are
available in various
range of depthslike
160, 200, 265, 320,
400, 450 and 500mm
slabs. The longest
spancan reach up to
18m
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ACTIVITY-2
Calculation of loads
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1. Dead load
• Dead load of the walls
• Dead load of slab
• Floor finish
• Total dead load of slab
2. Live Load
• Class rooms, conference hall
• Corridors, passages
• Staircase and toilets

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3. WindLoad
Windloads dependon the velocityof windat the locationof the
structure, permeabilityof the structure, height of structure etc.
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ACTIVITY-3
Design of HC slab panels
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• As per is code 1348 2012 for
prestressed concrete

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CONNECTION OF HC SLAB PANELS
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ACTIVITY-4
LAYOUT OF SLAB
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• Complete layout of slab
is done
• Autocad 2020 is used

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ACTIVITY-5
DESIGN OF BEAMS AND COLUMNS
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• Designing is carried out using STAAD PRO
• The nodes were assigned and the corresponding beams
were added
• The columns were produced by translational repeat
• The section properties and support details were added.
• Load case details were assigned and analysis were
done.

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EXAMPLE OF STAAD PRO DESIGN
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SHEAR FORCE AND BENDING MOMENT
DIAGRAMS
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ACTIVITY-6
DESIGN OF FOOTINGS
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• Footings are designed
by using Microsoft
excel

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58. Contoso Ltd.
Team
MOHD.
ZAHED
FAROOQUI
160316732062
B.E. CIVIL
MOHD
ABDUL
MUJEEB
160316732100
B.E. CIVIL
MOHD.
RAZA
160316732066
B.E. CIVIL
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SYED
AHMED
WASIF ALI
160316732096
B.E.CIVIL

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CO-ORDINATOR AND MENTOR
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ABDUL WAJID SIDDIQUI
Coordinator & Assistant Professor, DCET

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Thank You