recent progress on regulations and standards for steel...

Recent Progress on Regulations

and Standards for Steel

Buildings in Thailand

WANCHAI YODSUDJAI

RANGSAN WONGJEERAPHAT

PIYA CHOTICKAI*

Department of Civil Engineering, Kasetsart University

Presentation Outline

• Project Background

• Consultant Team

• Current Regulations and Standards for Steel


• Progress on Standards for Steel Buildings in

Thailand

EQ

Corrosion Protection

Fire Protection and Rating

Project Background

• The Ministerial Regulation No. 6 (B.E. 2527) specifies

the allowable and ultimate strengths for design and

construction of steel buildings.

Limited use of new high performance materials and

new design/construction approaches

• The Ministerial Regulations No.60 (B.E. 2549)

provides a requirement of concrete cover for structural

steel members. Fire resistance rating of main members

≥ 3 hours

Prescriptive Design

• The Ministerial Regulation (B.E. 2550)

provides a requirement on EQ resistant

design of buildings in seismic risk areas.

• Standards for design of concrete buildings

DPT 1301-50, DPT 1302-52, DPT 1303-57

• Require revision on regulations and standards for

structural steel buildings.

No available standard

for steel buildings

EvaluationEQ LoadDetailing

Department of Public Works and Town & Country Planning

(DPT)

Expert/Consultant Team

Fire Protection

Assoc.Prof.Dr. Akhrawat Lenwari

Project Leader: Assoc.Prof.Dr. Wanchai Yodsudjai

Material and Construction

Specifications

Assoc.Prof.Dr. Taweep Chaisomphob

EQ Resistant Design

Assoc.Prof.Dr. Piya Chotickai

Corrosion Resistance

Assoc.Prof.Dr. Somkiat

Rungthongbaisuree

Manual for Design and Construction

Assoc.Prof.Dr. Trakool Aramraks, Dr. Rangsan Wongjeeraphat

Regula

tion a

nd S

tandard

Flow Chart of Work

Review available Thai/International

regulations and standards for steel

buildings

Data collection for regulation and

standard development

Draft of regulations and standards

Study of impact and obstacles

Revision of draft

Public hearing

Final draft of regulations and standards

Current Regulations and Standards for

Steel Buildings

• The Ministerial Regulation No. 6 (B.E. 2527)

Structural steel with THK 40 mm Fy 240 MPa

Structural steel with THK > 40 mm Fy 220 MPa

Allowable tensile, compressive and flexural stresses

60% of yield stress

Allowable shear stress 40% of Yield stress

IBC (International

Building Code)

2009

Building Code of

Australia 2015

The Building

Regulations

2010, England

and Wales

National

Building Code

of Canada

(NBC, 2005)

Refer to relevant

standards for

hot rolled, cold

formed, composite

deck, corrosion

protection, cable

etc.

Required

Performance

Refer to relevant

standard for hot

rolled, cold

formed,

residential and

low-rise steel

framing

Provide design

concept and

refer to relevant

standard

Objective-

based format,

Refer to

relevant

standard for hot

rolled and cold

formed

Comparison of Regulations

• The Ministerial Regulations No.60 (B.E. 2549)

Storage, hotel, hospital

Commercial, industrial, or educational buildings

Office buildings with number of stories 3, Building with area on one floor or total area 1,000 sq.m.

High rise building, building with auditorium

Structural Steel Minimum Concrete Cover (mm)

Column 150x150 mm 50



Beam 50

Alternative of fire protection shall be proved by tests

(ISO 834 or ASTM E119) Fire resistance rating of 3 hrs.

• DPT 8301-52: Requirements on building materials

• DPT 8302-52: Standard for design and installation of fire

resistance element Fire resistance partition

• DPT 8302-52: Standard for design and installation of

firestop system and firestop device

• The Ministerial Regulation

(B.E. 2550)

Seismic Risk Zone May be

affected by EQ

(Southern Part of Thailand)

Zone 1 Area with soft soil, May

be affected by long-distance EQ

(Central Part of Thailand)

Zone 2 Area near fault lines

(Northern and Western Parts of

Thailand)

• Apply to public and educational

buildings or buildings with H >15 m

• Equivalent design method for regular buildings

with H 73 m

• Load Combinations

U = 1.7DL+2.0LL

U = 0.75(1.7DL+2.0LL+2.0WL)

U = 0.75(1.7DL+2.0LL+2.0EQ)

• Base Shear Calculation:

V = ZIKCSW

Coefficient of Seismic Hazard

(Z = 0.19 for Bangkok)

Importance Factor

Coefficient of EQ Resisting System

Fundamental Period

Soil

USA

o Seismic Provisions for Structural Steel Buildings (ANSI/AISC 341-10)

o Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications (ANSI/AISC 358-10)

AUS

o AS 4100 Steel structures (2012) – Australia: Section 13 Earthquake

Canada

o CAN/CSA-S16-09 (2009). “Limit States Design of Steel Structures”.

Euro

o Eurocode 8 – Design of Structures for Earthquake Resistance

Review of Standard of EQ Resistant Design

Progress on Standard for EQ Resistant Design

of Steel Buildings in Thailand

Comparison of Standards for EQ Resistant Design

AISC 341-

10

CSA S16-

14Eurocode 8

AS

4100

Thai

Standard

1. General Requirements/

MaterialsX X X X X

2. Member and Connection

Design RequirementX X X X X

3. Moment-Frame Systems X X X X X

4. Braced-Frame/Shear Wall

Systems or Plate WallsX X X X X

5. Composite Systems X - - - -

6. Quality Control/Inspection X X - X -

Standard for EQ Resistant Design of Steel Buildings in

Thailand

Standard will provide requirements on:

Section selection to achieve expected ductility

Buckling and control failure mechanisms

Lateral bracing design

Beam-column connection design

Braced frame design

Building

SystemSeismic Force Resisting System (SFRS)

Response

Modification

Factor, R

System

Overstrength

Factor, o

Building

Frame

System

Steel Eccentrically Braced Frame with Moment

Resisting Connections

8 2

Steel Eccentrically Braced Frame with Non-

Moment Resisting Connections

7 2

Special Steel Concentric Braced Frame 6 2

Ordinary Steel Concentric Braced Frame 3.5 2

DPT 1302-52

Width-to-Thickness Ratio for Moderate and Highly Ductile

Members (AISC 341-10)

• Documents and publications on EQ performance of steel

buildings

• Investigation from Northridge Earthquake (1994)

• Failure of welded-flange-bolted-web (WUF-B) Cracks

at weld connection between beam and column flanges

Ref: (Roeder, 2002)

Data Collections for EQ Resistant Design Standard

Causes of Failure:

• Change in section property at beam-column connection

• Stop of welding at beam web causing defects

• Without removal of backing bar Difficult for inspection of

defects

• Stress concentration at weld access hole

• Weld connection between beam flange and column flange

subjected to multi-stresses Brittle and crack generated

from defects

• Beam-column connection developed after Northridge Earthquake

(1994)

• Weld Connection 1) Welded-Flange-Welded-Web 2) Haunch

Connection 3) Cover Plate Connection 4) Reduced-Beam-Section

Connection

•Welded-Flange-Welded-Web Connection

Reduced-Beam-Section Connection

Haunch ConnectionCover Plate Connection

• Bolted Connection: 1) Extended End Plate Connection 2)

Bolted-Flange-Plate Connection and 3) Bolted T-Stub

Connection

Extended-End-Plate Connection Bolted-Flange-Plate Connection

Bolted T-Stub Connection

Outline of Standard for EQ Resistant Design for Steel


CH 1-2: Scope and Definition

CH 3: Material Requirement

Limitation of yield stress for members subjected to large inelastic

deformations during EQ 345 MPa

CH 4: Classification of Section

Moderately Ductile, Highly Ductile Section Width-to-Thickness

Ratio

CH 5: Requirement of Lateral Bracing

Strength, stiffness, and locations for lateral bracings

AISC 341-10

CH 6 Welding and Bolt Connections

Requirements on welding and pretensioned high strength bolt

CH 7 Ordinary Moment Frame (OMF)

CH 8 Intermediate Moment Frame (IMF)

CH 9 Special Moment Frame (SMF)

CH 9 Ordinary Concentric Braced Frame (OCBF)

CH 10 Special Concentric Braced Frame (SCBF)

Bolted Flange Plate Moment Connection

Detailing for Prequalified Beam-Column Connections (AISC 358-10)

Bolted Unstiffened and Stiffened

End-Plate ConnectionReduced Beam Section Connection

CH 11 Prequalified Beam-Column Connections

Progress on Regulation and Standard for Corrosion Protection of Steel Buildings

Assoc.Prof.Dr. Somkiat Rungthongbaisuree

Progress on Regulation and Standard for Corrosion Protection in Thailand

• Considerations during design and construction Satisfactory

service life

• Rating for corrosion aggressive environment, methodologies

for corrosion protection

• Review Regulations and standards:

Japan: Standard specifications for steel and composite

structure (2009)

Hong Kong: Code of Practice for the Structural Use of

Steel (2011)

Australia: National Construction Code of Series (2015)

India: General Construction in Steel – Code of Practice, IS

800

Europe: Eurocode 3 – Design of Steel Structures

Comparison of Regulations and Standards

JSCE 2009

Hong Kong

Code of

Practice

2011

AUS

Building

Code 2015

India

Code of

Practice

2007

Thai

Standard

1. General

Requirement√ √ - √ √

2. Environmental

SeverityLocation 5 Levels

Distance

from salt

water

5 Levels 6 Levels

3. Design

Requirements

√ √- -

√

4. Surface

Preparation

-√

-

√

Included in

Painting

System

√

JSCE 2009

Hong Kong

Code of

Practice

2011

AUS

Building Code

2015

India

Code of

Practice

2007

Thai

Standard

5. Corrosion

Protection

System

Basic

Requirements

without details

on painting

system

Basic

Requireme

nts without

details on

painting

system

√ √ √

6. Quality

Control of

Painting

System

- - - - √

Comparison of Regulations and Standards

Corrosion Protection System

Classification of Area

(JSCE 2009)

Outline of Standard for Corrosion Protection of

Steel Building in Thailand

CH 1-2 Introduction and Definition

CH 3 General Requirement

(Ref: ISO 12944-1 : General Introduction)

- Life of corrosion-protection system is shorter than a

service life of structures. Therefore, maintenance and repair

of the system should included during design process.

- Level of protection system

Low 2 – 5 years

Moderate 5-15 years

High > 15 year

CH 4 Classification of Environments

(Ref: ISO 12944-2)

Classification of Environment: 6 Levels

C1 Very low

C2 Low

C3 Medium

C4 High

C5-I Very High (Industrial)

C5-M Extremely High (Coastal)

Use experiment based on corrosion rate to identify

severity of corrosive environment

Severity of Environment

CH 5 Design Considerations

(Ref: ISO 12944-3 : Design Consideration)

CH 6 Surface Preparation

(Ref: ISO 12944-4 : Types of Surface Preparation)

CH 7 Painting System for Corrosion Protection

(Ref: ISO 12944-5 : Protective Paint Systems and Data

collection)

CH 8 Laboratory Performance Test Methods

(Ref: ISO 12944-6 : Laboratory Performance Test

Methods)

Progress on Regulation and Standard for Fire Protection of Steel Buildings

Assoc.Prof.Dr. Akhrawat Lenwari

Review of Regulations and StandardsUSA

The International Building Code (IBC 2012)

ASCE Standard (ASCE/SEI/SFPE 29-05): “Standard Calculation

Methods for Structural Fire Protection”

AISC Specification (ANSI/AISC 360-10): “Specification for Structural

Steel Buildings”

Canada

National Building Code of Canada (NBCC 2010 )

Standard CSA S16-09

Europe

Eurocode 3 (EN 1993-1-2:2005)

AUS

The Building Code of Australia (BCA 2015)

Standard AS 4100-1998 Steel Structures

Comparison of Regulations and Standards for Fire Protection

IBC 2012NBCC

2010

Building

Regulation

Ireland

2006

Building

Code of

Australia

2015

Thai

Standard

1. Fire Resistance

Rating of Structural

Members

X X X X -

2. Construction

Classification X X X X -

3. Prescriptive Fire

Resistance X X X X X

4. Calculated Fire

Resistance X X X X X

Outline of Regulation for Fire Protection of Steel Buildings

in Thailand

CH 1-2 Scope and Definition

CH 3 Reference Standards

- DPT 8302-52 , DPT 8303-52

- ASCE/SEI/SFPE 29-05: Standard Calculation Methods for

Structural Fire Protection

- ASTM Standards

CH 4 Requirements on Fire Protection

- Concrete and bricks (Property and minimum cover)

- Gypsum Wallboard (Property and installation)

- Spray Applied Material (Property and minimum cover)- Pipe filled with concrete (Property)- Intumescent

CH 5 Fire Resistance Rating (Column beam and truss)

Outline of Standard for Fire Protection of Steel Buildings

in Thailand

(Ref: AISC 360-10 and AS 4100-98)

CH 1-2 Scope and definition

CH 3 Reference Standards

- AISC 360-10 “Specification for Structural Steel Buildings”

- AS 4100-1998 “Steel Structures”

CH 4 Critical Temperature

CH 5 Load Calculation during Fire Event

CH 6 Material Properties at Elevated Temperature

CH 7 Fire Resistance Rating Calculation

Thank You

Promote public safety and use of steel material for

building construction.

Promote new technology, high performance material,

and new construction techniques.