eng cvl chap7 f2015 suspension bridges
DESCRIPTION
Suspension bridgesTRANSCRIPT
-
CIE 2102:Mechanics Of Structure
Arches and suspension bridges
10-Sep-15 1
Arches and suspension bridges
Rashma R S V
-
Three Hinged Arches
Arches are curved beams that transfer loads
Statically determinate
10-Sep-15 2
-
components
10-Sep-15 3
-
Arch subjected to loads
10-Sep-15 4
Any section in arch is subjected to normal thrust, N, Radial Shear, Q and Bending Moment
-
Type 1 - Circular/segmental arches
10-Sep-15 5
-
Type 2 - Parabolic arches
10-Sep-15 6
-
Type 3 - Parabolic arches with
springing at different levels
10-Sep-15 7
-
Steps for Analysis of Three Hinged Arches
1. Calculate end reactions
2. Find Horizontal reaction by applying
Moment about crown equals zero.
3. Find slope at the section and determine
10-Sep-15 8
3. Find slope at the section and determine
normal thrust and radial shear
4. Find Bending Moment at the section
required.
8
-
Suspension Bridges
The cable and girder are connected by
hangers/suspenders
10-Sep-15 99
-
components
10-Sep-15 10
-
10-Sep-15 11
-
FBD of Girder and cable
10-Sep-15 12
-
FBD
10-Sep-15 13
-
FBD of cable
10-Sep-15 14
-
Steps for Analysis of suspension bridges
1. Draw the free body diagram of cable and
girder
2. Calculate end reactions considering external
loading
3. Determine equivalent udl taking moments
10-Sep-15 15
3. Determine equivalent udl taking moments
about c=0
4. Find Horizontal reaction and vertical reaction
of cable
5. Calculate slope and maximum tension in the
cable15
-
The End
10-Sep-15 1616
The End