GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-IV (OLD) EXAMINATION - WINTER 2018
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Subject Code:140603 Date: 10/12/2018
Subject Name: Structural Analysis-II
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Distinguish between : Pre-tensioning and Post tensioning [07]
(b) Define strain energy. State and Prove Castigliano’s first theorem. [07]
Q.2 (a) Calculate fixed end moments and draw B.M. and S.F. diagrams for a fixed beam AB of span 4m and subjected to udl of 25 kN/m over the entire span. [07]
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(b) Calculate vertical displacement of point C for a rigid cantilever frame shown in Fig. 1. E =2 x 105 N/mm2 and I =3 x 108 mm4. [07]OR
(b) Calculate horizontal displacement of point C for a rigid cantilever frame shown in Fig. 1. E =2 x 105 N/mm2 and I =3 x 108 mm4. [07]
Q.3 (a) List causes of side sway for portal frame. [04]
(b) Using Moment Distribution method find support moments and draw B.M. and S.F. diagrams for the continuous beam shown in Fig. 2 [10]
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OR
Q.3 (a) Explain (i) Carry over factor (ii) Distribution Factor [04]
(b) Analyse the beam shown in Fig. 3 by consistent deformation method. Draw shear force and bending moment diagram. EI = constant. [10]
Q.4 (a) Advantages and disadvantages of fixed beam. [04]
(b) A continuous beam ABC is having spans AB and BC of length 4m and 3m, respectively. Span AB is subjected to udl of 60 kN/m while span BC is subjected to udl of 80 kN/m respectively. Consider support system at A, B and C is roller (simply) support. Find the support moments and draw B.M. and S.F. diagrams. [10]
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OR
Q.4 (a) Explain Muller-Breslau principle. [04]
(b) Using Slope Deflection method, determine the support moments and reactions for the continuous beam shown in Fig. 4. Draw B.M. and S.F. diagrams. [10]
Q.5 (a) State and explain Clapeyron’s theorem of three moments. [04]
(b) Using Kani’s Method, determine the moments at A, B, C, D for the portal frame as shown in Fig. 5 [10]
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OR
Q.5 (a) List losses in prestressing. [04]
(b) Draw influence line diagram for propped cantilever beam AB of length 12 m for (i) Reaction at fixed end (Va) (ii) Reaction at propped end (Vb) [10]
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