JNTU
JNTU B.Tech II STRUCTURAL ANALYSIS I Previous Question Paper (September/October - 2023 - R13)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
PART - A
Define statically determinate structures with examples.
Answer
A structure is statically determinate if all its internal forces and support reactions can be determined using only the equations of static equilibrium. Examples include simply supported beams, cantilever beams, and three-hinged arches.
Define statically indeterminate structure with examples.
Answer
A structure is statically indeterminate if the number of unknown reactions or internal forces exceeds the number of available equilibrium equations, requiring compatibility conditions for solution. Examples include fixed beams, propped cantilevers, and continuous beams.
Differentiate perfect and imperfect frame.
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Distinguish between pin jointed and rigidly jointed structures.
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Mention the causes for sway in portal frames.
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Explain the use of slope deflection method.
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What is distribution factor? Explain.
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Define flexural rigidity.
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What is the use of influence line diagram?
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State the three equilibrium equations.
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PART - B
Determine the forces in members by method of joints and check the force in member GF by method of sections shown in figure.1.
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Determine the forces in all the members of the truss shown in Figure 2. By method of joints and verify the forces in members BC, AF by method of sections.
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A 3 hinged parabolic arch has a span of 20m and central rise of 4m. It is loaded with UDL of 2kN/m for a length of 8m from left hand support. Determine the normal thrust and radial shear & BM at a distance of 2m, 4m & 6m.
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Show that the bending moment anywhere in three hinged Parabolic arch subjected to u.d.l. over entire span is equal to zero.
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A propped cantilever of span 9m subjected to an UDL of 12kN/m throughout the length and it is propped at 5m from left end. Draw BMD and SFD.
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A fixed beam AB of span 20m carries point load 160kN and clockwise moment of 150kNm at distances 5m and 15m from the left end respectively. If the left end support sinks by 20mm, Find the fixed end moments and reactions at the supports. Take EI = 5500kNm2.
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Analyse the beam shown in figure 3 by slope deletion method.
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Analyse the beam shown in figure 4 by Moment distribution method.
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A single rolling load of 100kN moves on a girder of span 20m. Construct the influence lines for Shear force and Bending moment for a section 5m from the left support.
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A single rolling load of 500 kN moves on a girder of span 16m. Construct the influence lines for points at which the maximum shears and maximum bending moment develop. Determine these maximum values.
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