Challenge

Week 6 Challenge

AAnand Mandal19 Jan 2023

aim-: calculate two pipe load on a bridge and analysis this load in staddpro

given data-:

width of bridge=3m

pier to pier distance as from figure=24m

dia of pipe P1& P2= 700mm & 500mm

first calculation of pipe load-:

Let us say pipe type k9class

1. self wt of DI pipe for 700 mm dia no classification so let us say 600mm dia is 217.19kg/m=.21719kn/m

for span of 24m = 0.21719*24= 5.21256kn

live load of DI pipe i.e load due to water= area* unit wt=`pi`0.*0.3*10=2.82kn/m

total load acting on bridge= 5.21256+2.82=8.04kn/m

simillary for 200mm dia pipe class k9 type wt= 45.28 kg/m=0.04528kn/m

for 24m span = 0.04528*24=1.08672kn

live load on pipe due top water= pi*0.1*0.1*10=0.3142kn/m

total wt on bridge= 1.08672+0.3142=1.401kn/m

this two pipe load is applied on superstructer of bridge as UDL

apply this load in stadd pro

Create a node at origin X=0,Y=0,Z=0 , from geometry add beam as bridge width 3m and from translition repeat command in X dir with 8 step at spacing of 3m as shown in given figure the span length of bridge is 24m

As shown in given figure it is steel structure and a truss bridge so using translation repeat @Y dir of ht of 2.5m with linked step create same structure

now add the diagonal member of truss structure and insert node at top of mid point width of bridge

now form figure add beamin-z direction by same translitional repeat command @ 1m as 700mm dia pia is @ 1m from end of beam simillarly 200 @ 0.640 and two other beam @same distance 0.640 but at +z dir

the whole structure after introducing whole member are as shown below

now define the properties for the member as shown in the given diagram

Assinging the property bottom beam ISMB 2500 verticle member as ISA 75*75*6

end of the verticle member ISMC 200, introduced the properties to the angle member as ISA 65*65*6 and top angle member as ISA 50*50*6

assisn property to top channel as ISA 90*90*8

after assinging the whole member properties creat a node @ -Y dir of ht and give fixed support to the pier

and assign to property as circular of dia 1.2m

now add first load case as K9 DI pipe of 600mm dia simillarly for 200mm dia pipe and define W1 for 600mm dia and w1 for 200mm dia pipe as follow the loading diagram is also shown as folloe after assinging the load by selecting the beam member @ 1m and 0.640m