Project 1

AIM:

Calculate the dead load , IRS live loads , Earth pressure load , wind load and seismic loads for the bridge structure at Ahmedabad Metro rail project. Model the bridge structure in Staad Pro and Apply all the calculated loads.

GIVEN:

Assume the unit weight of soil as 18 kN/m3 .

Use IS 875 code book for finding the Basic wind speed at the site location.

Use IS 1893 code book for determining the seismic zone.

PROCEDURE & CALCULATION:

1. This is the ahmedabad metro rail bridge design. I calculated dead load, live load, earth pressure, seismic in this type of loads.

SEISMIC LOAD

2.The seismic load calculated in IS 1893-2016.

3.City Ahmedabad, RC building with special moment resisting frame 5, Important building 1.5, Medium soil, Depth is 20m

4.Next go the load cases detailes to add EQ Direction x, EQ Direction z

5 EQ Direction X to add seismic load Direction X, Factor 1

6. EQ Direction Z to add seismic load Direction Z, Factor 1

DEAD LOAD

7.Next to add Dead load

8.Dead load > add> self weight -1

LIVELOAD CALCULATION

9.Vehicle definition > add > width 3.6m

10.No of loads to be generated = Length of the span + Length of the vehicle/ Incremental

= 10+21.1/0.5

= 62.2 = 63

11.Generated the load 4-66

12.Generated load 67-129

EARTHPRESSURE LOAD

13. To add earthpressure load

14. Earthpressure load > Plate loads > Hydrostatics load

Earth pressure = KaYh = 0.5 (Gamma soil - Gamma water) 20

= 0.5 (18-10) 20

= 80 kN/m2

15. Opposite side to enter the -80kN/m2

16.Run analysis > Go to post processing mode

RESULTS:

17.Deflection

18.Displacement

19.Shear FY

20.Shear FZ

21.Bending moment MX

22.Bending moment MY

23. MY (local)

24. SY (local)