Suspension Bridge Design San Jose del Rio
INPUT DATA (in RED) Span L
qparabola
Horizontal Span L (m) 29 T 3.544 3.965 4.225
Proposed Deflection % 4 6.931 7.28 3.181
Proposed Deflection h (m) 1.16 T1 qpoint load Deflection h Tower
Tower Height H (m) 3.965 Height
Tower to Anchor L1 (m) 7.28 Anchor Cable
Anchor Angle F (deg) 28.57460499 F T0
Main Cable Tower
Sin F 0.478302666 R2 R5
Cos F 0.878195058
Tan F 0.544642857
Gravitational Acceleration g (m/s/s) 9.81
Tower to Anchor
Wind Load Factor f 1.15 Point Load
Safety Factor S 4 R1 R3 W R4 R6
Deckway and Cables Mass per metre Md (Kg/m) 40.7
Tower Compression Strength C (N) 1823094
Load Case Description Point Mass Point Force Point Force on 1 Cable Location
No. M (Kg) F (N) F/2 (N) x (m)
1 People 500 4905 2452.5 14.5
Main Cable and Load Details
Cable Diameter Cable Diameter Cable mass per metre Cable force per metre Cable Tensile Strength Deckw ay and Cables Mass per metre Deckw ay and Cables Force per metre/cable Total Distributed Load (inc. w ind) Cable Type Cable Diameter
Milimetres (mm) Metres (m) Mc (Kg/m) w c (N/m) New tons Md (Kg/m) w d (N/m) W = (w d + w c + F/L) x f mm
8 0.008 0.21 2.06 34335 40.7 199.63 329.20 1 8
10 0.01 0.382 3.75 56653 40.7 199.63 331.14 2 10
16 0.016 0.84 8.24 137340 40.7 199.63 336.31 3 0
18 0.018 1.063 10.43 173821 40.7 199.63 338.83 4 0
20 0.02 1.528 14.99 226613 40.7 199.63 344.07 5 20
30 0.03 2.95 28.94 482864 40.7 199.63 360.11 6 30
57.2 0.0572 12.479 122.42 1850451 40.7 199.63 467.61 7 57.2
RF Summary
Parabola (including point load distributed)
Parabola Cable Diameter Main Cable Main Cable
Main Cable Angle Sin q Cos q Tan q Tension at Low Point Tension at High Point Tension in Anchor Cable Tow er Reaction Anchor Reaction (Vert.) Anchor Reaction (Hor.) Milimetres Centre Tow er Anchor Cable Tow er
q (Deg) T0 (N) T (N) T1 (N) R3 (N) R1 (N) R2 (N) (mm) Tension Tension Tension Compression
9.09 0.1580 0.9874 0.1600 29834 30213 33972 21022 16249 29834 8 0.29 0.28 0.25 21.68
9.09 0.1580 0.9874 0.1600 30010 30391 34172 21146 16345 30010 10 0.47 0.47 0.41 21.55
9.09 0.1580 0.9874 0.1600 30478 30866 34705 21476 16600 30478 16 1.13 1.11 0.99 21.22
9.09 0.1580 0.9874 0.1600 30706 31097 34965 21637 16724 30706 18 1.42 1.40 1.24 21.06
9.09 0.1580 0.9874 0.1600 31181 31578 35506 21972 16983 31181 20 1.82 1.79 1.60 20.74
9.09 0.1580 0.9874 0.1600 32635 33050 37162 22996 17775 32635 30 3.70 3.65 3.25 19.82
9.09 0.1580 0.9874 0.1600 42378 42917 48255 29861 23081 42378 57.2 10.92 10.78 9.59 15.26
RF Summary
Cable with Point Load at Centre Cable with Point Load at Centre (only the point load)
Main Cable Angle Sin q Cos q Tan q Tension in Main Cable Tension in Anchor Cable Tow er Reaction Anchor Reaction (Vert.) Anchor Reaction (Hor.) Cable Diameter Main Cable Anchor Cable Tow er
q (Deg) T (N) T1 (N) R3 (N) R1 (N) R2 (N) Milimetres (mm) Tension Tension Compression
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 8 0.56 0.49 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 10 0.92 0.81 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 16 2.23 1.97 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 18 2.83 2.49 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 20 3.68 3.25 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 30 7.85 6.92 47.60
4.57 0.0797 0.9968 0.0800 15377 17454 9575 8348 15328 57.2 30.08 26.50 47.60
RF Summary
Combined Loads
Combined Loads Cable Diameter Main Cable Main Cable
Tension at Low Point Tension at High Point Tension in Anchor Cable Tow er Reaction Milimetres Centre Tow er Anchor Cable Tow er
T0 (N) T (N) T1 (N) R3 (N) (mm) Tension Tension Tension Compression
45211 45590 51426 30597 8 0.19 0.19 0.17 14.90
45387 45769 51626 30721 10 0.31 0.31 0.27 14.84
45855 46243 52159 31051 16 0.75 0.74 0.66 14.68
46083 46474 52419 31211 18 0.94 0.94 0.83 14.60
46559 46955 52960 31546 20 1.22 1.21 1.07 14.45
48012 48427 54616 32571 30 2.51 2.49 2.21 13.99
57755 58294 65709 39436 57.2 8.01 7.94 7.04 11.56
Cable Shape Parabola Point Load
Distance From Centre Height Height
x (m) y (m) y (m)
-14.50 1.160 1.160
-13.05 0.940 1.044 Cable Shape
-11.60 0.742 0.928
-10.15 0.568 0.812
1.40
Height of cable (m)
-8.70 0.418 0.696
1.20
-7.25 0.290 0.580
1.00
-5.80 0.186 0.464
0.80
-4.35 0.104 0.348
-2.90 0.046 0.232
0.60
-1.45 0.012 0.116 0.40
0.00 0.000 0.000 0.20
1.45 0.012 0.116 0.00
2.90 0.046 0.232 -14.50 -9.50 -4.50 0.50
Distance from centre of cable (m) 5.50 10.50
4.35 0.104 0.348
5.80 0.186 0.464 Parabola Point Load
7.25 0.290 0.580
8.70 0.418 0.696
10.15 0.568 0.812
11.60 0.742 0.928
13.05 0.940 1.044
14.50 1.160 1.160
Suspension Bridge Design : San Jose del Rio
INPUT DATA (in RED)
Horizontal Span L (m) 80
Proposed Deflection % 4
Proposed Deflection h (m) 3.2
Tower Height H (m) 2
Tower to Anchor L1 (m) 2
Anchor Angle F (deg) 45
Sin F 0.707106781
Cos F 0.707106781
Tan F 1
Gravitational Acceleration g (m/s/s) 9.81
Wind Load Factor f 1.15
Safety Factor S 4
Deckway and Cables Mass per metre Md (Kg/m) 24
Post Compression Strength C (N) 0
Load Case Description Point Mass Point Force
No. M (Kg) F (N)
2 People 0 0
Main Cable and Load Details
Cable Diameter Cable Diameter Cable mass per metre Cable force per metre
Milimetres (mm) Metres (m) Mc (Kg/m) wc (N/m)
8 0.008 0.21 2.06
10 0.01 0.382 3.75
16 0.016 0.84 0.00
18 0.018 1.063 0.00
20 0.02 1.528 14.99
30 0.03 2.95 28.94
57.2 0.0572 12.479 122.42
Parabola
Suspension Cable Angle Sin q Cos q Tan q
q (Deg)
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
9.09 0.1580 0.9874 0.1600
Cable with Point Load at Centre
Suspension Cable Angle Sin q Cos q Tan q
q (Deg)
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
4.57 0.0797 0.9968 0.0800
Combined Loads
Tension at Low Point Tension at High Point Tension in Anchor Cable Tower Reaction
T0 (N) T (N) T1 (N) R3 (N)
34437 34875 48701 39947
34922 35366 49387 40509
33845 34275 47863 39260
33845 34275 47863 39260
38154 38639 53958 44259
42165 42701 59630 48911
69040 69918 97637 80086
Cable Shape Parabola Point Load
Distance From Centre Height Height
x (m) y (m) y (m)
-40 3.200 3.200
-36 2.592 2.880
-32 2.048 2.560
-28 1.568 2.240
-24 1.152 1.920
Height of cable (m)
-20 0.800 1.600
-16 0.512 1.280
-12 0.288 0.960
-8 0.128 0.640
-4 0.032 0.320
0 0.000 0.000
4 0.032 0.320
8 0.128 0.640 -14.50
12 0.288 0.960
16 0.512 1.280
20 0.800 1.600
24 1.152 1.920
28 1.568 2.240
32 2.048 2.560
36 2.592 2.880
40 3.200 3.200
3.544 3.965 4.225
6.931 7.28 3.181
Location
x (m)
14.5
Cable Tensile Strength Deckway and Cables Mass per metre Deckway and Cables Force per metre
Newtons Md (Kg/m) wd (N/m)
34335 24 117.72
56653 24 117.72
137340 24 117.72
173821 24 117.72
226613 24 117.72
482864 24 117.72
1850451 24 117.72
Tension at Low Point Tension at High Point Tension in Anchor Cable
T0 (N) T (N) T1 (N)
34437 34875 48701
34922 35366 49387
33845 34275 47863
33845 34275 47863
38154 38639 53958
42165 42701 59630
69040 69918 97637
Tension in Suspension Cable Tension in Anchor Cable Tower Reaction
T (N) T1 (N) R3 (N)
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
Cable Shape
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
14.50 -9.50 0.50
-4.50 Distance from centre of cable (m) 5.50
Parabola Point Load
Total Distributed Load (inc. wind)
W = (wd + wc + F/L) x f
137.75
139.69
135.38
135.38
152.62
168.66
276.16
Tower Reaction Anchor Reaction (Vert.) Anchor Reaction (Hor.)
R3 (N) R1 (N) R2 (N)
39947 34437 28247
40509 34922 28644
39260 33845 27761
39260 33845 27761
44259 38154 31296
48911 42165 34585
80086 69040 56630
Anchor Reaction (Vert.) Anchor Reaction (Hor.)
R1 (N) R2 (N)
0 0
0 0
0 0
0 0
0 0
0 0
0 0
5.50 10.50
RF Summary
Parabola (including point load distributed)
Cable Diameter Suspension Cable Suspension Cable
Milimetres Centre Tower Anchor Cable Tower
(mm) Tension Tension Tension Compression
8 0.25 0.25 0.18 0.00
10 0.41 0.40 0.29 0.00
16 1.01 1.00 0.72 0.00
18 1.28 1.27 0.91 0.00
20 1.48 1.47 1.05 0.00
30 2.86 2.83 2.02 0.00
57.2 6.70 6.62 4.74 0.00
RF Summary
Cable with Point Load at Centre (only the point load)
Cable Diameter Suspension Cable Anchor Cable Tower
Milimetres (mm) Tension Tension Compression
8 #DIV/0! #DIV/0! #DIV/0!
10 #DIV/0! #DIV/0! #DIV/0!
16 #DIV/0! #DIV/0! #DIV/0!
18 #DIV/0! #DIV/0! #DIV/0!
20 #DIV/0! #DIV/0! #DIV/0!
30 #DIV/0! #DIV/0! #DIV/0!
57.2 #DIV/0! #DIV/0! #DIV/0!
RF Summary
Combined Loads
Cable Diameter Suspension Cable Suspension Cable
Milimetres Centre Tower Anchor Cable Tower
(mm) Tension Tension Tension Compression
8 0.25 0.25 0.18 0.00
10 0.41 0.40 0.29 0.00
16 1.01 1.00 0.72 0.00
18 1.28 1.27 0.91 0.00
20 1.48 1.47 1.05 0.00
30 2.86 2.83 2.02 0.00
57.2 6.70 6.62 4.74 0.00