Week 4 Challenge

aim-: calculate earth pressure and apply on it on stadd pro

given data

backfill ht=7m, GL@ 3m

length of wall is 5m

calculation of earth pressure on abutment wall

assume ka=0.35 & k0=.5 , Y=18kn/m3

earth pressure @3m K1=kaYh=0.35*18*3=18.9kn/m2

earth pressure @7m K2=k0Yh=0.5*18*7=44.1kn/m2

apply pressure in stadd pro

by assuming ht of wall 8m & thickness of wall is 0.3m

create a node and by translational reapeat creat a plate @ y direction 05*05 of 8mht and length @ X dir of 5m

now give property as plate thickness of 0.3m

now create node and provide foundation of 2m width

as given data thickness of footing is 1m provide plate thickness as 1m and support as fixed to footing

now provide load case details as earth pressure @ z dir and add load of value w1 & w2 and select the plate for 3m and 7m

THE FOLLOWING LOADING IS SHOWN IN STADD FILE

NOW RUN THE ANALYSIS AND ITS GIVES THE RESULTS AS FOLLOWS MX LOCAL AND MY LOCAL VALUES AS 57.7KNM AND 9.03KNM