Steel Designers Manual - TheBestFriend.org

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Steel Designers' Manual - 6th Edition (2003)
H
=L(1+(J))
wL2
8d
/ 64 d2 x2\'
T =H1+ L4 )
Ad
=
=
16 d2
+-----)
16d( 24d2
15 L f\5 L2
AL (15 — 40 + 288
16(5-24)
Mmax = 0.161 pL2 (4 Eld2
where is the equivalent modulus of
foundation, approximately 1100 kN/m2
2a t / 4 Eld
Mmax. occurs when
= —h-- y-— ii)
! !
I-
2 H
d
]IIIIj
TW
Mmox
L
(b)
L
L
Initial design 149
(a)
w
—ø H
stiffness EL
(cable + deck)
Fig. 4.15 Suspension bridges, approximate formulae (Pugsley). (a) Neglecting stiffness of
deck; (b) including deck stiffness