Project 1

AIM:- To calculate the dead load, IRS live loads, Earth pressure load, wind load and seismic loads of the bridge structure for Ahmedabad Metro rail project. And also to design the bridge structure in stadd pro.

LIVE LOAD CALCULATION:-

1. EARTH PRESSURE LOAD

Given:- unit weight of soil = 18 kn/m3, Height of wall = 18.5 m

Assuming, Ka value as 0.35

Active earth pressure, K1 = Ka*unit weiht of soil*height

= 0.35*18*18.5

= 116.55 KN/m2

Figure Height of wall to apply the earth pressure load

2. WIND LOAD

Vb = 39 m/s (Ahmedabad)

k1 = 1.06

k2 = 1.07

k3 = 1

k4 = 1.3

Design wind speed, Vz = Vb*k1*k2*k3*k4

= 39*1.06*1.07*1*1.3

= 57.50 m/s

Wind pressure, Pz = 0.6*Vz*Vz

= 0.6*57.50*57.50

= 1983 N/m2

= 1.983 kn/m2

3. SEISMIC LOAD

Zone-III (Ahmedabad)

Z = 0.16

RESULT ANALYSIS

1. STATIC CHECK:- Static check is ok as difference between the reaction and loading is zero.

Figure Static check

2. DISPLACEMENT: Maximum displacement = 81.914 mm in x direction due to earth pressure

Figure Maximum displacement

3. REACTION: Maximum shear in X, Y and in Z direction as well as maximum moment in X, Y, and in Z direction

Fx = 1290.779 KN Mx = 34.902 KN-m

Fy = 869.019 KN My = 175.349 KN-m

Fz = 111.298 KN Mz = 1691.772 KN-m

Figure Maximum reaction

4. BEAM RESULT:- Beam is provided where IRS live load is applied.

Fx = 267.639 KN Mx = 9.787 kn-m

Fy = 156.516 KN My = 4.169 kn-m

Fz = 8.055 Mz = 420.306 kn-m

Figure Bending Moment Diagram

Figure Beam result

5. PLATE STRESSES

• Plate stresses (Vertical wall)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
6484	6612	176	2.47	0.631

• Plate stresses (Top Roof Level)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
697	695	42	0.283	0.250

• Plate stresses (concourse level)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
2369	2367	155	0.391	0.377

• Plate stresses (Base level)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
6484	6612	176	0.488	0.388

• Plate stresses (Indicative structural member)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
240	388	31.177	0.395	0.574

• Plate stresses (Platform level)

Mx (KN-m/m)	My (KN-m/m)	Mxy (KN-m/m)	Shear X (N/mm2)	Shear Y (N/mm2)
179	286	23	0.225	0.278