CIV ENG 4Y04 BRIDGES AND OTHER STRUCTURAL SYSTEMS Term Test – OCT. 2010

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s 220 mm

1000 mm

Slab at mid-span between girders

DEPARTMENT OF CIVIL ENGINEERING McMaster University

Hamilton, Ontario, Canada

CIV ENG 4Y04 BRIDGES AND OTHER STRUCTURAL SYSTEMS TERM TEST (Day Class) Instructor: Dr.K.S.Sivakumaran Duration of Examination: 2 Hours 28 October 2010

This examination paper includes 2 pages and 3 questions. You are responsible for ensuring that your copy of the paper is complete. Bring any discrepancy to the attention of your invigilator.

SPECIAL INSTRUCTIONS: ONLY McMaster Standard Calculator (Casio fx-991) will be permitted. Answer all THREE questions. All answers should be in a logical sequence with clear explanations, equations, and sketches where appropriate. [Marks will be deducted for illogical sequence, and or lack of explanations] Assume reasonable value for any parameter, if you consider that the corresponding value is not given herein.

You may use

UNMARKED copy of 9th Edition, Handbook of Steel Construction, CISC-2006.

UNMARKED copy of 3rd edition, Concrete Design Handbook, CPCA-2006.

No other books, notes, and loose sheets are permitted. References and Clause numbers should be clearly indicated, if used.

Problem No: 1 (10 Marks) [Detailed Calculations Needed] The slab-on-girder type bridge transverse bridge deck associated with an interior panel experiences a factored moment of 120 kN.m / m.width (see the figure). Using f’c = 35 MPa and #15M reinforcing bars fy = 400 MPa, and considering the A23.3 – Clause: 10.1 – General principles, determine the necessary spacing ‘s’ for these reinforcements. [Do not use memorized equations; no marks will be given for such equations]

CIV ENG 4Y04 BRIDGES AND OTHER STRUCTURAL SYSTEMS Term Test – OCT. 2010

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Problem No: 2 (20 Marks) [Detailed Calculations Needed] According to S16-01 clause: 17.9.4, composite action shall not be assumed if the steel concrete interconnection is less than 40%. Turn to Page 5-42 of Handbook of Steel Construction. Note the last composite section listed in the table, W410x46. Note the first line, when b1=3000 mm, Mrc (kN.m) for 40% shear connection is given as 463 kN.m. Through detailed calculations, show that the resistance given (463 kN.m) is in fact correct. Problem No: 3 (20 Marks) [Detailed Calculations Needed – Tables may be used for steel section properties only] The figure shows the repetitive pattern of a proposed floor girder for a bus station, which consists of 200 mm thick concrete slab (strength f’c=36.5 MPa) 100% shear connected to a steel box beam. The steel box beams are proposed to be fabricated by welding together 350 W grade steel plates. The span length of the floor beam is 8 m. [a] Determine the factored moment resistance of the floor girder. [b] Determine the factored shear resistance of the floor girder.

200 mm thick Concrete slab

Box beamOuter Depth = 800 mmOuter Width = 400 mmWall thickness = 10 mm

2000 mm

END