Project 2
Given Data
high flood level iss 4 mtr
span of bridge = 4X10=40 Mtr
mean volocity of the river = 2.5 m/s
width of carrage way 9 mtr
live load class is 70R tracked vehicle
radius od curvature in the bridge is 2 m
desifn speed is 50 km/hr
size of pier 1.2*1.2
width od deck slab 9 mtr
thikmness os deck slab 1.5
deck od flat <30 degree
Depth is occumulation is 1250 mm
Sol:
Water current force
width 9 mtr
span 4x10=40 mtr
the high flood level iss 4 mtr
mean voilicity = 2.5 m/s
maximum volocity =v sqrt*vmean
=2*2.5=3.536
Water current force p= 52*k*v2
=52*0.66*3.536=121.356
Snow Load
width od deck slab 9 mtr
thikmness os deck slab 1.5
deck od flat <30 degree
Depth od snow 1250 mm
Span 4x10=40 mtr
density of occumulation =8kn/m3
snow load=8*1.250*40=400kn
shape effective is IS875 Part 4
for the angle B<30degree =u=0.8
Design snow load s
s=u*So
=0.8*100=320 kn/m
Centrifugal force
width od deck slab 9 mtr
Span 4x10=40 mtr
Design speed 50 km/hr
radius od curvature in the bridge is 2 m
Centrifugal force = (W*V2)/(127R)
=(70*50*50)/(127*2)
=688.970
The Centrifugal force 688.976 kn
Wave Load
width od deck slab 9 mtr
Span 4x10=40 mtr
Cresh Wave is 3m
i-girder height 1.6 m
bottom flag=2 m
flange web is 300 mm
Dwck slab thikness is 1.5 mtr
r = 5
Assume Cva = 3
Stome Elevation 8.5 m
Cr = 0.4
zh = hmax-Centeral of I-Girder
=2.9-(2/2)=1.9
zh= hmax - Elevation of bottom deck
=2.9-1 = 1.9
N is number of supports girder = 4
Vertical load Fv= r*zv*av
=10*1.9*(9*1.6/2)=136.8
Horizontal fn=r*zh*ah
10*1.9*(3.1*40)=2356
Max Vertical load =fvmax=cva*fv
=3*136.8=410.4
max Horizontal load =(1+0.4(4-1))*3*2356=15549
Temperature Load
Grade = M40
Span 4x10=40 mtr
width 9 mtr
Bridge location is Delhi
Effective temperature difference =(48.4-2.2)/2+10=35.30
Stress to temperature of d=t*e
11.27*10-6*35.3*5000(40)1/2=12.58
Maximum Stress = (2/3)*0.7*sqrt fck
2/3*0.7*(40)1/2=2.95
Top Temperature 48.4
Bottom Temperature
(-2.2)/17.8)*48.4=5.71 Degree
Impact Load
Span 4x10=40 Mtr
Width 9 mtr
live load as per irc 70r
the spans grater than is 9mtr
for tracked vechile and span >9 mtr catergey the impact load as per irc6 code is 25% of the live load
Impact Load = (25/100)*70=17.5 Kn
Open Staad Pro.
Drow the Bridge
View in 3d modal
Going to loading option
Add All load & Vechine detail As per irc6
Add Vechine detail As per irc6
Temperature
Going to run Anlysis
0 Error , 0 Warring , 0 Note,
Go to processing mode
MZ Difflection
MY Difflection
MX Countour
MY Countour
MXY Local
Attach the Staad pro file
Tnank You.