Download - 20111129 Gen Column Shortening Presentation
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midas Gen
midas Gen Advanced Webinar Column Shortening for High-rise Building
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Column Shortening for High-rise Building
Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
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Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
03
11
14
19
24
Introduction in Column Shortening
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One Stop Solution for Building and General Structures
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Introduction
Why construction stage analysis?
Column Shortening
Wind Live
Earthquake
Completed structure
Live, Wind and Seismic Loads Sequential Loading: Dead Loads
Construction Sequence
Dead
(1) Dead load is sequential load.
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One Stop Solution for Building and General Structures
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Introduction
Why construction stage analysis?
Column Shortening
End Moment of Girder by Stories (Wall Connection)
Comparison between with and without considering sequential loading
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One Stop Solution for Building and General Structures
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Column Shortening Elastic stresses due to gravity loads Creep caused by gravity load Drying shrinkage Temperature variations of exposed columns
Steel Concrete
Elastic Creep
Shrinkage
19.6 - -
6.1 4.6 6.1
Total 19.6 16.8
Shortenings of an 80-story column (cm)
Introduction Column Shortening
Why construction stage analysis?
(2) Compensation for the differential column shortening in high-rise building
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One Stop Solution for Building and General Structures
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Effects of column shortening
Deforms in pipes, elevator rails, cladding Cracks in partitions
Introduction Column Shortening
Nonstructural Effect
Structural Effect
Distorted slabs or beams due to differential movements
Gravity load redistribution
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One Stop Solution for Building and General Structures
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Shortening related to construction sequence
Introduction Column Shortening
Pre-slab installation shortenings Shortenings of supports that take place up to the time of slab installation
Post-slab installation shortenings
Shortenings of supports that take place after the time of slab installation
:Compensation
: Design Level
: Pre-slab Installation shortening
: Post-slab Installation shortening
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One Stop Solution for Building and General Structures
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Compensation for differential column shortening
Introduction Column Shortening
Reinforced Concrete Structure Pre-slab installation shortenings has no importance Compensation by leveling the forms Post-slab installation shortenings due to subsequent loads and
creep/shrinkage
Steel Structure Columns are fabricated to exact length. Attachments to support the slabs Pre-slab installation shortenings need to be known. Compensation for the summation of Pre-installation and Post-installation
shortenings
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One Stop Solution for Building and General Structures
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Application procedure for column shortening
Application in field
Material & Section property Loads, Construction sequence
Pre-analysis for column shortening
Considering load redistribution due to differential shortening
Analysis
Updating material properties by experiments Construction sequence considering the field condition
Column Shortening analysis
Compressive strength Modulus of elasticity Creep & Shrinkage
Material Experiment
Using Strain gauge
Measuring shortening
Predicting shortening for further stages Providing an amount of compensation
Column Shortening re-analysis
Introduction Column Shortening
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Project Applications
Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
03
11
14
19
24
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One Stop Solution for Building and General Structures
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Project Applications
Burj Khalifa (Dubai, UAE)
Column Shortening
Height 705 m No. of floors 160 Location Dubai, United Arab Emirates Function / Usage Office Building & Residential Building Designer Adrian D. Smith Architect Skidmore, Owings & Merrill General Contractor Samsung Development
over
view
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One Stop Solution for Building and General Structures
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Project Applications
SK S-Trenue (Seoul, Korea)
Column Shortening
Area 39,600m2 No. of floors 36 Location Seoul, Korea Function / Usage Office Building Structure Type Composite Structure Foundation Type Mat Foundation Lateral load resisting system RC Core + Steel + RC Composite Frame
over
view
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Procedure for Construction Stage Analysis
Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
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One Stop Solution for Building and General Structures
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How to use the construction stage analysis in midas Gen
Define materials, sections
Assign elements, boundaries, & loads to the groups
Define time dependent materials
Enter the construction stage analysis data
Perform an analysis
Check results for each construction stage
Check column shortening
Creep & Shrinkage Compressive strength
Specify the duration of CS Activate/Deactivate element groups / boundary groups/ load groups
Procedure for Construction Stage Analysis Column Shortening
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One Stop Solution for Building and General Structures
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Time Dependent Material Properties
Column Shortening
1. Creep effects of concrete members having different maturities
2. Shrinkage effects of concrete members having different maturities
3. Time dependent compressive strength gain for concrete members
Procedure for Construction Stage Analysis
Creep/Shrinkage - Eurocode, ACI, CEB-FIP, PCA, India Comp. Strength
- Eurocode, ACI, CEB-FIP, Ohzagi , India
Time dependent material properties
Construction Stage
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One Stop Solution for Building and General Structures
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Construction Stage Analysis Data
Column Shortening Procedure for Construction Stage Analysis
0 day 10 day 20 day 30 day 40 day
Construction Stage Duration Construction Stage Duration
Activation or Deactivation of
element, boundary, and load
Activation or Deactivation of load with time span from
the stage start
Activation or Deactivation of
element, boundary, and load
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One Stop Solution for Building and General Structures
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Check results for each construction stage
Column Shortening Procedure for Construction Stage Analysis
Analysis results can be checked for each construction stage.
Absolute minimum or maximum results of envelope can be also checked among entire construction stages.
Results for creep and shrinkage effect are provided.
[Beam Forces for each construction stage] [Displacement due to Creep & Shrinkage]
CS1
CS3
CS6
CS10
CS12
Min/Max
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Useful Features for Construction Stage Analysis
Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
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One Stop Solution for Building and General Structures
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Building Model Generation Wizard
Column Shortening Useful Features for Construction Stage Analysis
The wizard readily allows us to define the timing of elements created and loadings applied in the
construction stages during the erection of a building.
You may find it more convenient to first click the [Automatic Generation] button to define the basic
construction stages and modify them as necessary.
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One Stop Solution for Building and General Structures
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Construction Stage Analysis for Composite Members
Column Shortening Useful Features for Construction Stage Analysis
Define an analytical model for each construction stage by assigning activated or inactivated sections
corresponding to each construction stage of a composite section.
By using Composite Section for Construction Stage, we can consider the construction sequence with
creep and shrinkage effect.
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One Stop Solution for Building and General Structures
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Auto Climbing Formwork System
Column Shortening Useful Features for Construction Stage Analysis
Construction stage for auto climbing formwork system (ACS) can be generated in midas Gen.
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One Stop Solution for Building and General Structures
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Tendon Loss
Column Shortening Useful Features for Construction Stage Analysis
Pre-stress load can be considered in construction stage analysis.
Tendon primary / secondary forces are provided with pre-stress loss graph.
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Demonstration
Introduction in Column Shortening
Project Applications
Procedure for Construction Stage Analysis
Useful features for Construction Stage Analysis
Demonstration
03
11
14
19
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One Stop Solution for Building and General Structures Design Procedure Demonstration
Example model
Structural plan & section
9@4=
36m
2@
4.5=
9m
5m
50m
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One Stop Solution for Building and General Structures Design Procedure
Section name Section size
G1 G2 G3 G4
WG1 WG2
400x700 400x700 600x800 500x800 400x700 600x800
Story C1 C1A C2 C3 C4
10~12 8~9 6~7 4~5 2~3
1
600x600 800x800
800x1000 1000x1000 1000x1200 1000x1300
500x600 500x600 500x600 600x600 700x700 700x700
600x600 600x800 600x800 800x800
900x1000 1000x1000
600x700 600x800 600x800 800x800 800x800
1000x1000
600x700 600x800 600x800 800x800 900x900 900x900
Section Size and Material Properties
Girder
Column
Wall Thk = 200
fck = 240 kg/cm2
fck = 280 kg/cm2
fck = 280 kg/cm2
Demonstration
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One Stop Solution for Building and General Structures Design Procedure
Construction Schedule
3rd day
1F Formwork Installation
1F Concrete Casting
2F Formwork Installation
2F Concrete Casting
1st day 8th day 10th day
3 levels of shoring Construction cycle time=7 days Time of removal of lowest level of shores from concreting of top floor=5 days
Age
Age
0 5
0
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Demonstration
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One Stop Solution for Building and General Structures Design Procedure
Construction Schedule
3F Formwork Installation
12
5
15th day
3F Concrete Casting
7
17th day
0
1F Formwork Removal 4F Formwork Installation
22th day
4F Concrete Casting
24th day 29th day
2F Formwork Removal 5F Formwork Installation
Age
Age
14
5
12
19
14
21
7
0 5
12
19
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Demonstration
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One Stop Solution for Building and General Structures Design Procedure
Date Work Formwork Removal Formwork Installation
Conc. Casting
Stage Definition
Program Date
Stage Duration
1 1F Formwork Installation 1F
3 1F Concrete Casting 1F
8 2F Formwork Installation 2F
10 2F Concrete Casting 2F
15 3F Formwork Installation 3F
17 3F Concrete Casting 3F
22 1F Formwork Removal, 4F Formwork Installation 1F 4F stage 1
1 7
24 4F Concrete Casting 4F 3
29 2F Formwork Removal, 5F Formwork Installation 2F 5F stage 2
8 7
31 5F Concrete Casting 5F 10
36 3F Formwork Removal, 6F Formwork Installation 3F 6F stage 3
15 7
38 6F Concrete Casting 6F 17
43 4F Formwork Removal, 7F Formwork Installation 4F 7F stage 4
22 7
45 7F Concrete Casting 7F 24
Construction Schedule
Demonstration
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One Stop Solution for Building and General Structures Design Procedure
Date Work Formwork Removal Formwork Installation
Conc. Casting
Stage Definition
Program Date
Stage Duration
50 5F Formwork Removal, 8F Formwork Installation 5F 8F stage 5
29 7
52 8F Concrete Casting 8F 31
57 6F Formwork Removal, 9F Formwork Installation 6F 9F stage 6
36 7
59 9F Concrete Casting 9F 38
64 7F Formwork Removal, 10F Formwork Installation 7F 10F stage 7
43 7
66 10F Concrete Casting 10F 45
71 8F Formwork Removal, 11F Formwork Installation 8F 11F stage 8
50 7
73 11F Concrete Casting 11F 52
78 9F Formwork Removal, 12F Formwork Installation 9F 12F stage 9
57 7
80 12F Concrete Casting 12F 59
85 10F Formwork Removal 10F stage 10 64 7
92 11F Formwork Removal, 1~3F SDL 11F
stage 11
71
7 95 4~6F SDL 74
98 7~9F SDL 77
99 12F Formwork Removal 12F stage 12
78 7
101 10~12F SDL 80
133 Live Load dummy 112 28
Construction Schedule
Demonstration
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Thank You! Thank You!
One Stop Solution for Building and General Structures
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1Column Shortening for High-rise Building 3IntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroduction 11Project ApplicationsProject Applications 14Procedure for Construction Stage Analysis 16 17 18 19Useful Features for Construction Stage AnalysisUseful Features for Construction Stage AnalysisUseful Features for Construction Stage AnalysisUseful Features for Construction Stage Analysis 24DemonstrationDemonstrationDemonstrationDemonstrationDemonstrationDemonstration 31