date: oct 25th, 2011 topic: concrete building design...

MIDAS On-Demand Servicemidas Gen

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Bridging Your Innovations to Realities

Date: Oct 25th, 2011

Topic: Concrete Building Design

Presenter: Daekyo Koo

midasmidas Gen Gen Advanced Webinar Advanced Webinar

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Contents

1. Introduction of Design Features

2. Design of RC Building

3. Capacity Design for RC Building

4. Q & A


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One Stop Solution for Building and General Structures

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1. Introduction of Design Features

Design Type

Steel : Steel code check

Steel Optimal Design / Displacement Optimal Design

Concrete : Concrete code design

Concrete code check

RC Capacity Design

Meshed Slab/ Wall Design

Footing : design

Steel

RC

Footing

Design Procedure


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Design Feature (available in midas Gen)


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Design Procedure Introduction

Available Design Code

RC Design Steel Design SRC Design

ACI318 AISC-LRFD SSRC79

Eurocode 2, Eurocode 8 AISC-ASD JGJ138

BS8110 AISI-CFSD CECS28

IS:456 & IS:13920 Eurocode 3 AIJ-SRC

CSA-A23.3 BS5950 TWN-SRC

GB50010 IS:800 AIK-SRC

AIJ-WSD CSA-S16-01 KSSC-CFT

TWN-USD GBJ17, GB50017 Footing Design

AIK-USD, WSD AIJ-ASD ACI318

KSCE-USD TWN-ASD, LSD BS8110

KCI-USD AIK-ASD, LSD, CFSD

Slab Design KSCE-ASD

Eurocode 2 KSSC-ASD

RC Design Steel Design Composite Design

Eurocode 2 (Irregular Section) Eurocode3(Irregular Section) Eurocode 4 (Irregular Section)

Footing Design

Eurocode 2 (L, interted T)

Gen 2010 (v2.1)

Gen 2011 (v1.1)


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PURPOSETo Learn RC Frame and Wall Design Features

2. Design of RC Building


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Design Procedure

RC Design Limitation (Section)

Available Section Types


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Design Procedure

Design

Based on the section size and the factored load obtained from the most unfavorable load combination, rebar data such as

rebar size and spacing are determined. Therefore, design can be performed when the section size is determined without

rebar data.

Checking

Strength verification can be performed by automatic design or by using the information of rebars (diameter, number and

design parameters) entered by the user. The results appear in blue when the strength verifications for the given section

properties and rebars are satisfactory, otherwise they appear in red.

Difference between Design and Checking

•Automatic Design by Gen

•Manual Calculation

Design

•Automatic Rebar update

•Modify Rebar Input Data

Rebar Input•Strength Verification with Updated Rebars

Check


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Design Procedure

Ultimate Limit State Design (3)


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Design Procedure

Meshed slab and wall design

• Slab and wall design for meshed plate elements as per Eurocode2-1-1:2004• Slab design for non-orthogonal reinforcement directions based on the Wood-Armer formula• Smooth moment and shear forces• Automatic generation of Static wind and seismic loads for flexible floors• Detailing for local ductility

Wall design

Slab serviceability checking

Punching shear check result

Slab flexural design


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Design Procedure

Wall Design

Members requiring reinforcement

In locations where σEdy is tensile or σEdx ⋅ σEdy ≤ τ2Edxy

Members not requiring reinforcement

In locations where σEdx and σEdy are both compressive and σEdx ⋅ σEdy > τ2

Edxy

Limitation in concrete stress

σcd ≤ νfcd

Wall design results are provided in contour, detailed rep

ort, and design force table. Also, concrete stress (σcd) ca

n be checked with νfcd.

The following results are provided from wall design:

Rebar spacing and diameter

Required rebar area & Required rebar ratio

Resistance ratio


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Wall element

Division of Wall element between story is not

allowed.


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Design of Multi Story RC Building


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Typical Sectional Plan


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Typical Floor Elevation


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Wall ID


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Overview (Slab Design)


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Overview (Slab Design)


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PURPOSETo Learn Capacity Design features

3. Capacity Design for RC Building


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Design Procedure

Seismic Design procedure as per EN1998-1:2004

Performance RequirementPerformance Requirement

Ground ConditionGround Condition

Seismic ActionSeismic Action

Combination of Seismic ActionCombination of Seismic Action

Criteria for Structural RegularityCriteria for Structural Regularity

Seismic AnalysisSeismic Analysis

Safety VerificationSafety Verification

Capacity Design & DetailingCapacity Design & Detailing

•Seismic Zone•Representation of seismic action

[Method of Analysis][Method of Analysis]•Lateral Force method of Analysis•Modal Response Spectrum Analysis•Pushover Analysis•Inelastic Time History Analysis


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Design Procedure

Capacity Design Feature

• structures to provide the appropriate amount of ductility in the corresponding ductility classes.• Automatic capacity design capability for beam, column, wall and beam-column joint• EN 1998-1: 2004 (DCM/DCH), NTC2008 (CD “B”, CD “A”), ACI318-05• Design action effects are calculated in accordance with the capacity design rule. Special provision for

ductile primary seismic walls is considered.• Detailing for local ductility is considered.

- max/min reinforcement ratio of the tension zone- the spacing of hoops within the critical region- mechanical volumetric ratio of confining hoops with the critical regions

Capacity design shear forces on beams

Define ductility class and check design results Design envelope moments in walls


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Design Procedure

Design member forces (Design moments)

Where,

MRb: Beam moment resistance

Mce : column member force due to seismic load case


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Design Procedure

Design member forces (Design shear forces)

Capacity design values of shear forces on beams

Capacity design shear force in columns

Where, MRb: Beam moment resistance

MRc: Column moment resistance (calcul

ated using same axial force ratio in

PM interaction curve)

Mce: Bending moment of column due to

seismic load case


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Design Procedure

Design envelope for bending moments in slender walls Design envelope of the shear forces in the walls of a dual system

Design member forces (Wall design forces)

Wall systems Dual systems


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Capacity Design of Multi Story RC Building


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Integrated Design System for buildings and General StructuresWhy midas GenWhy midas Gen

GSD (General Section Designer)

Stress Contour

Moment- Curvature

Definition of any irregular cross-

section

Section properties

P-M, P-My-Mz, M-M interaction

curves

Calculation of Section Capacity (in

flexure) and Safety Ratio based on

member forces.

Moment-Curvature curve.

Plot of Stress contours

All the above features are supported

for: RC sections, Steel sections

and Composite sections.




GSD (General Section Designer)




Dynamic Report Generator

Word format reports can automatically be generated for selected input &

output data (figures, tables, graphs, and text).




Dynamic Report Generator

Using “Dynamic Report Regenerator” function, changes of a model file are

automatically updated in the report.

User defined report format can be used and saved.

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Drag & Drop


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Gen

Thank You!Thank You!Thank You!For more information, please visit us at

http://en.midasuser.com

Any Questions?

http://en.midasuser.com/

date: oct 25th, 2011 topic: concrete building design...

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