Transcript Specifications for Highway Bridges

Specifications for
Highway Bridges
Masahiro Ishida
Public Works Research Institute
JAPAN
Specifications for Highway Bridges
(Japan Road Association)
•Part I
 •Part II
 •Part III
 •Part IV
 •Part V

: Common design principles
: Steel bridges
: Concrete bridges
: Substructures
: Seismic design
Discussing
NEXT Design Code

Performance Based Design Code
 Limit State Design
 Partial Safety Factors
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
160
140
z=3
2
f (kN/m )
120
z=5
100
z=10
80
60
40
20
0
0
10
20 30 40 50
N blow count
Figure 3. Confidence level
of 95 % (SPP in sand subsoil layers)
60
Figure 4. Estimated modification factors
for popular piling methods
Estimated modification factors
for popular piling methods
Figure 5. Estimated modification factors
for innovative piling methods
Estimated modification factors
for innovative piling methods