No. of Printed Pages: 3 IBICEE-OI0I
B.Tech. IN CIVIL ENGINEERING (BTCLEVI)
Term-End Examination
June, 2016

0001.6
BICEE-010 ANALYSIS AND DESIGN OF BRIDGES
Time hours Maxi.mum Marks: 70
Note: Attempt any five questions. All questions carry equal marks. Assume any missing data suitably. Use of scientific calculator and relevant IS· code is permitted.

1. A reinforced concrete simply supported slab is required for the deck of a road bridge having the following data:

Clear span 5.5 m
Width of carriageway 7.5 m
Footpath on either side 1 m wide
Use M 20 and Fe 415.
Type of loading -IRC Class AA
Design the deck slab Show the reinforcement details. 14

2. Explain IRC loading standards for a highway bridge and other loads considered for the analysis and design of bridges. 10

Discuss the factors influencing the choice of the type of bridge and its features. 4

3. Determine the design discharge at a bridge site after computing the maximum discharge by

Empirical method, and

Rational method,

for the following data: 4

Catchment area 160 km^2
D/s of the site from coast 12 km
D/s of critical point to the bridge site 16 km
Diff in elevation H 96 m
Peak intensity of rainfall 60 mm/h

Explain the procedure of Pigeaud's method for the determination of maximum moments on a bridge slab due to concentrated loads: What are the limitations of the method and how is it considered for a non-symmetrical load 10

4. Sketch the typical reinforcement details for the deck slab of a "reinforced concrete culvert with a clear span of 5 m. 4

Discuss the relative merits of the following three arrangements of a three girder T-beam bridge: 10

Without any cross beam on diaphragm

With three cross beams

With three diaphragms

5. The effective span of a through type truss girder highway two-lane bridge is 30 m. R.C. slab is 300 mm thick inclusive of wearing coat. Two footpaths of 1.5 m width are provided on either side of the carriageway. Consider IRC Class-A loading. Suggest a suitable truss girder. Design the central top chord and diagonal members of the central panel. 14

6. Explain with neat sketches the various types of bearings used in bridges. 10

List the various advantages of prestressed concrete bridges. 4

7. Discuss three methods of load distribution among the longitudinal girder of a T-beam type concrete bridge deck. 10

Sketch the typical cross-section of bridges with pre-tensioned members. 4