JNTU
JNTU B.Tech III STRUCTRUAL ANALYSIS - II Previous Question Paper (April - 2018 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Define distribution factor.
Answer
The distribution factor at a joint is defined as the ratio of the stiffness of a specific member connected to that joint to the total stiffness of all members meeting at that joint. It represents the proportion of an unbalanced moment at the joint that is resisted by a particular member.
What is the carry over factor of a bending member when the far end is (i) hinged (ii) fixed.
Answer
The carry over factor (COF) represents the ratio of the moment induced at the far end to the moment applied at the near end. (i) When the far end is hinged, the COF is 0. (ii) When the far end is fixed, the COF is 0.5.
What are the basic assumptions made in slope deflection method?
Answer
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Name the different types of arches as per structure configuration and determine SI of fixed arch.
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What is Substitute frame method, when this method will be used?
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Write the assumptions made in portal method.
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Discuss the properties of stiffness matrix.
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Develop flexibility matrix for the beam shown in Figure 1.
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State Castigliano's First theorem.
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Draw ILD for Reaction at prop of a Propped Cantilever beam.
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Part B
Analyze the continuous beam shown in Figure 2 using Kani's method.
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Analyze the portal frame shown in figure 3 by Moment Distribution method and draw BMD.
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Analyze the portal frame shown figure 4 by Slope-Deflection method.
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A parabolic two hinged arch has a span of 24m and a rise of 4m is subjected to 100kN and 150kN acting left and right quarter span respectively. Calculate the horizontal thrust and also calculate the bending moment at the loaded points.
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Determine the approximate values of moment, shear and axial force in each member of frame as shown in figure 5 using portal method.
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Discuss about factor method and substitute frame method analysis of frames for loads.
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Analyse the continuous beam shown in Figure 6 using Flexibility method.
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Analyse the frame shown in figure 7 by matrix stiffness method. Flexural rigidity is EI.
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Analyze the truss shown in Figure 8.
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State Muller-Breslau’s Principle, explain how to draw Qualitative Influence Lines for Statically Indeterminate Structures.
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Draw qualitative ILD for vertical reaction at each supports of a three span continuous beam.
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