2004spring_exam2

2004spring_exam2 - 1.054/1.541 Mechanics and Design of...

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1.054/1.541 Mechanics and Design of Concrete Structures Spring 2004 Prof. Oral Buyukozturk Massachusetts Institute of Technology 1.054/1.541 Mechanics and Design of Concrete Structures (3-0-9) Exam #2 Date: Tuesday, May 4, 2004 Time: 2:30pm ~ 4pm Note: This is an open-book and open-note exam. This exam is designed to test your knowledge of the concepts. Be brief and specific in your discussions. Question 1 – Bridge Torsion (45%) A small simply supported bridge in an industrial plant carrying a conveyor and spanning over 40 ft. has a T cross section as shown in Fig. 1. The bridge is to carry a full service live load of 110 lb/ft 2 over its entire width; when only one half of the width of the bridge is loaded a service live load of 180 lb/ft 2 shall be considered. Neglect the weight of the concrete for brevity. Capacity reduction factor for shear and torsion is φ = 0.85. H=30” d=27” L 26” b w =20” 16.5” b h =6” Fig. 1 Dimensions of the T cross section Material strengths are provided below: Concrete
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2004spring_exam2 - 1.054/1.541 Mechanics and Design of...

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