-Brief introduction about the precast concrete structures and its usage & application in the industry.
-Concept structural system of the G + 5 building using the architectural plans.
-Developing the structural framing plan to ground the vertical & lateral forces.
-Developing precast scheme for the building, breaking down to precast elements & schematic connections.
-Detailed design : load calculations, combinations, strength & SLS parameters.
-Preparing the analytical model for the building structure in ETABS. (geometry, loading, connection, foundation)
-Analyzing the behavior of the analytical model. (deflected shape, reaction, mode shapes, uplifts.
2. Table of Contents
• Course outline
• Introduction to precast structures
• Need & challenges with precast structures
• Technical basis for precast design
• Architectural layout of G+5 building
• Brief about the G+5 building
• Structural codes
• Analysis software
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3. Learning Objective
• By the end of this presentation, you will have basic understanding
about precast structures.
• The presentation nudges you towards the think about the challenges
faced during about the precast construction.
• After understanding the presentation, you should be able to read the
architectural drawings & develop structural plan accordingly.
• Students will be equipped to know the structural codes needed to
design a precast building.
• Students will get a brief idea about the analysis software which are to
be used in course further.
www.structuralgeek.com
4. Course Outline
• Brief introduction about the precast concrete structures and its usage
& application in the industry.
• Concept structural system of the G + 5 building using the architectural
plans.
• Developing the structural framing plan to ground the vertical & lateral
forces.
• Developing precast scheme for the building, breaking down to precast
elements & schematic connections.
• Detailed design : load calculations, combinations, strength & SLS
parameters.
www.structuralgeek.com
5. Course Outline
• Preparing the analytical model for the building structure in ETABS.
(geometry, loading, connection, foundation)
• Analyzing the behavior of the analytical model. (deflected shape,
reaction, mode shapes, uplifts.
www.structuralgeek.com
3D BIM model of a precast building structure
• Foundation design for the building
Structure.
• Precast member design & precast
connection design.
• Diaphragm design & robustness for
the building.
6. Precast Concrete Structure
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• Precast structures are casted earlier, then transported & erected on the
site to produce the finish building structure.
• It is alternate to the conventional cast in-situ construction, which helps
enhance product quality & reduce the time of construction.
• Precast structure need not be only of concrete, it can be mixture of
steel, concrete or some material.
• The elements are casted (at site/plant), demolded, lifted, transported to
site, assembled & erected.
• Precast element are of better strength and finish because of their
controlled production environment.
10. Structural Design of Precast Building
Building Specifications
• Number of stories : G + 5
• Floor plate dimension : 17 m X 11 m
• Location of the Structure : Kanpur
• Soil bearing capacity : 150 KN/m2
• Soil subgrade modulus: 10000 KN/m3
• Floor height: 2.7m (Stilt floor), 3.0m (Typical floor)
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11. Architectural Plan of Building
Arch. Plan at ground floor level
Ground floor plan
• Stilt floor
• Floor dimension
11mX 17m
• Usage : Parking
• Floor Height = 2.7m
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12. Arch. Plan at typical floor -1 level
Typical floor plan-1
• Typical floor
• Floor dimension
11mX 17m
• Usage : Residential
• Floor Height = 3.0m
• Level 2 – Level 5
Source
:
self
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Architectural Plan of Building
13. Structural codes
• This segment has the structural codes and references which will be
followed during the entire course.
• IS 456 :Plain and reinforced concrete
• IS 875 (Part 1-5) : Design Loads(other than earthquake) for buildings
and structures
• IS 1893 :Criterion for earthquake resistant design of structures
• IS 13920: Ductile detailing of reinforced concrete structures subjected
to seismic forces
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14. • IS 15916: Building Design and Erection Using Prefabricated concrete
• FIB 43: Bulletin 43 - Structural Connections for Precast Concrete
Buildings
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Structural codes
15. Analysis software
ETABS
• ETABS is the most user friendly &
prevalent tool in the building industry.
• Analysis capabilities: Static, dynamic,
linear, non-linear, p-delta, pushover, time
history
• Design capabilities: concrete design
(frames, shear walls, slabs), steel design.
• Used world-wide for building design
satisfactory detailing results.
www.structuralgeek.com
16. Strusoft FEM Design
• Advanced modeling software for FEM
analysis and design of the building.
• Material Capabilities: Steel, Concrete,
timber, composite sections
• Quite useful tool while working with Precast
structures.
• Edge connection parameters can be defined
for correct simulation.
www.structuralgeek.com
Analysis software
17. Pre-Stress
• Tool for design of prestressed
concrete elements.
• Design is performed at life stages for
elements (erection, lifting,
transportation, service etc.)
• Exact hollow core profiles, strand
patterns can be imported for analysis.
www.structuralgeek.com
Analysis software
18. Summary
• Precast concrete structures offer fast built & better-quality products
than cast in-situ buildings.
• Repeatability & constructability are critical points while deciding the
precast scheme of the building.
• Fixed connection are generally avoided in precast buildings.
• Structural system needs to be developed in parallel with architectural
plans.
www.structuralgeek.com