1. Specifications for Highway Bridges
Masahiro Ishida
Public Works Research Institute
JAPAN

2. Specifications for Highway Bridges (Japan Road Association)
•Part I : Common design principles
•Part II : Steel bridges
•Part III : Concrete bridges
•Part IV : Substructures
•Part V : Seismic design

7. Discussing NEXT Design Code
Performance Based Design Code
Limit State Design
Partial Safety Factors

8. Performance Requirement
LEVEL 1
Objectives
LEVEL 2
Functional Statement
LEVEL 3
Performance Requirement
LEVEL 5
Deemed-to-satisfy
LEVEL 4
Performance-based
method
Hierarchy of performance-based codes

11. Figure 3. Confidence level
of 95 % (SPP in sand subsoil layers)

12. Estimated modification factors for popular piling methods
Figure 4. Estimated modification factors
for popular piling methods
Figure 5. Estimated modification factors
for innovative piling methods
Estimated modification factors for popular piling methods
Estimated modification factors
for innovative piling methods