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൧൧ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER M.TECH DEGREE EXAMINATION, DECEMBER 2017

Branch: Civil Engineering

Stream: Structural Engineering

01CE7111 Design of Bridges (Elective IV)
Answer any mofull questions from each part
Assume any missing data suitably
Use ofall IRC codes IS 456, IS 1343, IS 800 and steel tables are permirted Limit
answers to the required points.

Max. Marks: 60 Duration: 3 hours

PARTA

1. Briefly explain the different ty pes of piers with neat sketches (4)

(5)

b. What are the different types of forces acting inan abutment. Explain briefly each with details.

The design details of a semicircular edge pier proposed for a T beam bridge having 20 m span (Nis

2.
as follows. Only straight portion ofthe pier is considered. Check the stability ofthe pier.
Top width of pier - 1.7 m Bottom width ofpier -
2.9 m Height of pier- 9.2 m
Height of water level -8.1 ന
Length of straight portion of the pier -8.2m
C/C distance between the bearings -0.45m
Dead load from each span ° 2400 kN Live load from each span
- 700 kN
Mean velocity of current - 3.0m/s
Pier material -PCC 1:3:6 Live load - class AA] class A
whichever produces worst effect
3. a. What are the functions of bearings ?
b. Explain in detail the different types of elastomeric bearings with neat figure.
PART B
4. Design a RCC slab bridge for an effective span of 4.5 m. Clear width of road way is6.8m. (9)
Live load of IRC Class AA tracked vehicle is to be used. Use M25 concrete and Fe 500 steel Check
for shear not required.
5 Explain the use of Pigeaud's curve for analyzing a slab (4) b. Draw neatly the cross section of a T

beam bridge and mark the various parts. Explain each (5) component with its functions.