Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

Structural Analysis

Civil Engineering (CE) : Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

The document Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev is a part of the Civil Engineering (CE) Course Structural Analysis.
All you need of Civil Engineering (CE) at this link: Civil Engineering (CE)

Q.1 A long uniformly distributed load of 10 kN/m and a concentrated load of 60 kN are moving together on the beam ABCD shows in the figure (not drawn to scale). The relative positions of the two loads are not fixed. The maximum shear force (in kN, round off to the nearest integer) caused at the internal hinge B due to the two loads is______    [2019 : 2 Marks, Set-I I]
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Solution:

ILD for VB
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Max. shear Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
= 70KN
Note: The maximum shear force at hinge B may be +70 kN or -70 kN. So, student can challenge this questions.

Q.2 Consider the beam ABCD shown in the figure
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
For a moving concentrated load of 50 kN on the beam, the magnitude of the maximum bending moment (in kN-m) obtained at the support C will be equal to _________ .    [2017 : 2 Marks, Set-I]
Solution:

Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
ILD for BM at C
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Max. BM occurs at C, when 50 kN load is at B.
Max. BM at C = 50 x (-4) = -200 kNm

Q.3 A simply supported beam AB of span, L = 24 m is subjected to two wheel loads acting at a distance, d = 5 m apart as shown in the figure below. Each wheel transmits a load, P = 3 kN and may occupy any position along the beam. If the beam is an I-section having section modulus, S=16.2 cm3, the maximum bending stress (in GPa) due to the wheel loads is _________ .    [2015 : 2 Marks, Set-II]
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Solution:
 
Method-1 (By ILD)
C.G. of system = 2.5 m from any load
For maximum bending moment, system of load should be,
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

Maximum BM will occur below load at C. Ordinate of ILD at C
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Ordinate of ILD at D
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Maximum BM = 5.935 x 3 + 3.695 x 3
= 28.89 kN-m
Maximum bending stress,
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Method-II  (By Statics)
Let the section at which absolute max. BM ocurs be at x distance from left support.
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Max. BM at section
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
For absolute max. BM,
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
⇒ x = 10.75 m
Absolute max BM
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Absolute max bending stress
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
AVOID MISTAK
(I)
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Max. bending stress
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
(II)
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Max. bending stress
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
This is the maximum bending stress at mid= span and not the absolute max. bending stress in the beam.

Q.4 In a beam of length L, four possible influence line diagrams for shear force at a section located at a distance of L/4  from the left end support (marked as P, Q, R and S) are shown below. The correct influence line diagram is    [2014 : 1 Mark, Set-I]
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
(a) P
(b) Q
(c) R
(d) S
Ans.
(A)
Solution:
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

Q.5 Beam PQRS has internal hinges in spans in spans PQ and RS as shown. The beam may be subjected to a moving distributed vertical load of maximum intensity 4 kN/m of any length anywhere on the beam. The maximum absolute value of the shear force (in kN) that can occur due to this loading just to the right of support Q shall be   [2013 : 2 Marks]
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev 
(a) 30 kN
(b) 40 kN
(c) 45 kN
(d) 55 kN
Ans.
(C)
Solution:
Drawing the ILD of shear force just to right of Q by using Muller Breslau’s principle. A cut is made just to the right of Q, since cut is very close to support Q, therefore displacement of left portion is almost zero and that to the right portion will be 1.
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev
If moving distributed load is present over span PR then we get maximum shear force just to the right of Q.
Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev 

Offer running on EduRev: Apply code STAYHOME200 to get INR 200 off on our premium plan EduRev Infinity!

Related Searches

Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

,

past year papers

,

Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

,

Free

,

Sample Paper

,

Previous Year Questions with Solutions

,

MCQs

,

shortcuts and tricks

,

ppt

,

Viva Questions

,

Semester Notes

,

practice quizzes

,

Extra Questions

,

Exam

,

Summary

,

mock tests for examination

,

Important questions

,

video lectures

,

pdf

,

study material

,

Objective type Questions

,

Past Year Questions: Influence Line Diagram & Rolling Loads GATE Notes | EduRev

;