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PROJECT :
PAGE :
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CLIENT :
DESIGN BY :
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JOB NO. :
DATE :
REVIEW BY :
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Cable Structure Design Based on ASCE 19-10 & AASHTO 17th
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INPUT DATA
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MAIN SPAN
L =4500
ft, (1371.60 m)
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CABLE MAX SAG
S =450
ft, (137.16 m)
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2-CABLE TOTAL LOAD ON STIFFENING DECK/GIRDER
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w =13,5kips/ft, (197 kN/m), ASD level.
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ANGLE OF ANCHOR CABLE
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a =60o
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CABLE TENSILE STRENGTH
fsu* = fpu =
270
ksi, (1862 MPa)
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SINGLE CABLE EFFECTIVE/NET AREA
A =800in2 (516128mm2 )
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ANALYSIS & DESIGN SUMMARY
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CheckS / L =1 /10,0<1 / 9
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>1 / 12
[Satisfactory]
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Parabolic Main Cable
y = 4S/L2 x (L - x) =
0,00008888888889
x ( 4500 - x )
, control suspender (D - y) to keep parabolic curve.
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Main Cable Curve Length =
4617,27
ft, (1407.34 m)
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Maximum Main Cable Tension
T = [ (0.5 w L)2 + (0.125 w L2/ S )2 ]0.5 =
81787,19051
kips, (363789 kN), ASD level.
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<
2 A fpu / Wt =
103473,0539
kips, (460248 kN)
[Satisfactory]
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whereWt =1.67 x2,5=4,175
, AISC 360 & Reference page 907.
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Reactions on Tower Top
R = 0.5 w L + T Cos a =
71268,6
kips, (317003 kN), ASD level.
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H = 0.125 w L2/ S - T Sin a =
5107,7
kips, (22719 kN), ASD level.
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Reference: Engineers' Handbook for Bridge Design, China Communications Press, July 2007.
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LICENSE NUMBER: Package License Including New Software Based on ASCE 41-17, ASCE 7-16, AISC 360/341/358-16
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www.Engineering-International.com
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