Recent Progress on Regulations and Standards for Steel...
Transcript of 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
Buildings in Thailand
• 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
Column 200x200 mm 40
Column 300x300 mm 25
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
Buildings in Thailand
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.