Part 1: Scope and Definition
Part 2: Administrations and Enforcement
Part 3: General Building Requirements, Control and Regulation
Part 4: Fire Protection
Part 5: Building Materials
VOLUME II
Part 6: Structural Design
Chapter 1 Definitions and General Requirements
Chapter 2 Loads on Buildings and Structures
Chapter 3 Soils and Foundations
Chapter 4 Bamboo
Chapter 5 Concrete Material
Chapter 6 Strength Design of Reinforced Concrete Structures
Chapter 7 Masonry Structures
Chapter 8 Detailing of Reinforcement in Concrete Structures
Chapter 9 Pre-stressed Concrete Structures
Chapter 10 Steel Structures
Chapter 11 Timber Structures
Chapter 12 Enforcement Structures
Chapter 13 Steel-Concrete Composite Structural Members
VOLUME III
Part 7: Construction Practices and Safety
Part 8: Building Services
Part 9: Alteration, Addition to and Change of Use of Existing Buildings
Part 10: Signs and Outdoor Display
APPENDIX OF BNBC 2017
SEISMIC ZONE CO-EFFICIENT
ZONE |
COEFFICENT (g) |
I |
0.12 |
II |
0.20 |
III |
0.28 |
IV |
0.36 |
Source: BNBC 2017 |
Table 6.2.16: Site Dependent Soil Factor and Other Parameters Defining Elastic Response Spectrum |
|||||
Soil type |
S |
TB(s) |
TC (s) |
TD (s) |
|
SA |
1 |
0.15 |
0.4 |
2 |
|
SB |
1.2 |
0.15 |
0.5 |
2 |
|
SC |
1.15 |
0.2 |
0.6 |
2 |
|
SD |
1.35 |
0.2 |
0.8 |
2 |
|
SE |
1.4 |
0.15 |
0.5 |
2 |
Table 6.C.1: Spectral Response Acceleration Parameter SS and S1 for Different Seismic Zone |
|||||
Zone–> |
1 |
2 |
3 |
4 |
|
Ss |
0.3 |
0.5 |
0.7 |
0.9 |
|
S1 |
0.12 |
0.2 |
0.28 |
0.36 |
RCC design:
· ACI 318-08
Steel design:
· AISC 360-05
Seismic Loads:
· Eurocode 8
· Alternatively in software ASCE 7-05 using Appendix C of BNBC 2017
Wind Loads:
· ASCE 7-05
LOAD COMBINATION FOR DIFFERENT DESIGN PROCESS
Load combination for structural design (LRFD)
· — 1.4D
· — 1.2D + 1.6 L + 0.5Lr
· — 1.2D + 1.6Lr + L
· — 1.2D + 1.6Lr +0.8W
· — 1.2D + 1.6W + L
· — 1.2D + 1.6W + L+0.5Lr
· — 1.2D + 1.0E + 1.0L
· — 0.9D + 1.6W
· — 0.9D + 1.0E
D= Dead Loads, L= Normal Live Loads, Lr= Roof Live Loads, E= Earthquake Loads, W= Wind Loads
Also we have to consider the following load combination for structural design
— Have to consider in design for vertical earthquake load
— Vertical deflection for Gravity load
-D+L
— Creep, settlement and long term effect
– D+0.5L
— Lateral deflection for wind load of building
– D+0.5L+ 0.7W
CONCLUSION:
Civil engineers will review BNBC 2017 and practice it to create safer and more sustainable Bangladesh.
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