Structural Mechanics, Question Paper of Civil Engineering 4th Semester, Download Question Paper 5

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STRUCTURAL MECHANICS

5^th Exam /Civil/5162

                                                             

Duration 3 Hrs.

Section –A

Note : attempt any ten questions.

1.       

a.     Explain briefly about tensile test on mild steel.

b.     What is poison ratio?

c.      Give the relationship between the elastic constants.

d.     Define normal and shear stresses.

e.      List and sketch different supports to beams

f.       What do you mean by ‘varying lands’?

g.     Define sending moment and given its sign conventions

h.     What do you mean by radius of gyration?

i.       Define theorem of parallel axis

j.       What do you mean by section modulus?

k.     Give Euler’s formula for columns.

l.       Define a redundant frame.

Section –B

Note : attempt any three questions

2.       

a.     Calculate the second moment of area of a T-section 150x 150x 50mm about horizontal and vertical axes passing through center of gravity of section.

b.     Calculate the reactions at support A and B or beam loaded as shown in fig. 1 Draw BMD and SFD. Also determine the pints of contra flexor with in span AB and show their positions on BMD.

c.      A masonry frier  3 mm x 4 m supports a vertical load of 600 KN as shown in fig 2. Determine

                                                             i.      The stresses at the comers of the frier.

                                                           ii.      Additional load that should be applied at the center of frier so that there is no tension anywhere on the section.

                                                        iii.       The stresses at four comers with the additional load at center.

                                                        iv.      A beam ABC, 5.4 m long carries a load of 120 KN at B. AB = 1.8 BC =3.6 find the defection under the load EI= 32x10³ KNm²