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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 1 Examinations 2010/
Module Title: Bridge Engineering
Module Code: CIVL
School: Building and Civil Engineering
Programme Title: M Eng in Structural Engineering
Programme Code: CSTRU_9_Y
External Examiner(s): Dr. MJ Creed Mr P Sutton Internal Examiner(s): Mr K Ruane
Instructions: Answer Question 1
Duration: 3 hours
Sitting: Winter 2010
Requirements for this examination: This is an open book examination
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination paper. If in doubt please contact an Invigilator.
Q1 A bridge is required to carry an existing road at ground level on an 8% gradient across a new motorway in a cutting on a skewed alignment. The carriageway on the bridge shall be 5.5m wide with a 1.5m wide footpath on each side as shown in Figure Q1. The bridge shall have parapets 1.0m high incorporated at the edges of the deck.
The road levels, cut slopes and minimum clearances shown in Figure Q1 must be achieved.
Roadway loading shall be 10kN/m^2. Footpath loading shall be 5kN/m^2. A load of 1000kN (applied in the plane of the bridge deck, in any direction) shall be used to represent vehicle forces. Wind loading shall be 2.0kN/m^2. Temperature and impact loading may be ignored.
The ground conditions are given in Figure Q1.
(a) Prepare an illustrated design appraisal indicating a distinct and viable solution for the bridge. Identify the type and details of construction together with the overall means of stability and articulation. State the reasons you have chosen your solution. 60 marks
(b) Prepare sufficient design calculations for the bridge superstructure to establish preliminary sizes of all significant structural elements. 40 marks
