Week 10 Challenge

Aim-: calculate the snow load and apply it in staddpro

Given data and calculation of design snow load

density of snow =300kg/m^3=3kn/m^3(as depth is 1.25 considered it as setteled snow)

Depth of Snow=1.25m.

Flat deck, angle β=0 Degree.

Span=10m.

Snow Load (So)=Density of Settled Snow *Depth of Snow*Span of the Bridge.

=3*1.25*10

So=37.5KN/m

Shape Coefficient from IS 875 Part IV,

For angle β<30 degree,μ=0.8

Design snow load,S=μ*So

=0.8*37.5

S=30KN/m.

Apply it in Stadd pro and analyse

Create a node @ origin as(0,0,0) and width of deck slab as show in figure in Z dir @ 9m add a beam

Now by using translitional repeate span of bridge is 10M SO STEP 1 @ 10m linked the step the deck of bridge is ready

arrangements of beam/girder as of provided in figure is provided by using translitional repeate first @3m then 4m 2 steps and again 1 step in 3m

Now as we know the minimum clearence of deck slab should be 5m so assuming pier of 9m @ -Y dir create a node and linked the step and by using translitional repeate copy the pier in Z dir and @ X dir.

after creating the pier give support to them as fixed support

the geometry of given figure is ready as per given figure specification now assign the property to the structural member

as Pier=1.2m dia, girder is of rect =1.5*1.5

for deck slab create plate and by using translitional repeate copy the plate in X and Z dir by providing number of step as length/0.5

assign property to deck slanb and thivkness of plate as in fig =0.9m

add load case as snow load -30 to assign this load on girder select the girder and loading diagram as shown

as per IS 875 part iv minimum snow load should be 9kn we provided that load on deck slab

now after load assigning run the analysis and [post processing to getr the results

plate stress @ MX local as -1.55

t

by selecting only member the beam maximum force is shown by annoting the resuly

shear max is from annotation is shown

report for moment @ z and Y generated