CE-416
Pre-stressed Concrete Lab.
Course Teacher: MR. GALIB & MS. SABRINA

Influence Line for Reaction ,Moment & Shear
for...
INFLUENCE LINE
An influence line is a plot of the magnitude of the resulting
reaction/axial force/shear/moment generated i...
INFLUENCE LINE
WHY REQUIRED???
* Dead loads are fixed in positions ---- Live loads can change their positions

* Our objec...
INFLUENCE LINE
METHODS FOR CONSTRUCTION OF INFLUENCE LINE
BRUTE FORCE METHOD[USES STATICS/MECHANICS TO CALCULATE THE
INTER...
INFLUENCE LINE
TYPES OF STRUCTURE
**STATICALLY DETERMINATE
**STATICALLY INDETERMINATE
INFLUENCE LINE
INFLUENCE LINE
INFLUENCE LINE
INFLUENCE LINE FOR REACTION & MOMENT[INDETERMINATE BEAM]
INFLUENCE LINE
INFLUENCE LINE FOR MOMENT[INDETERMINATE
BEAM]
INFLUENCE LINE
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IL of Reaction,shear,moment for indeterminate structure

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IL of Reaction,shear,moment for indeterminate structure

  1. 1. CE-416 Pre-stressed Concrete Lab. Course Teacher: MR. GALIB & MS. SABRINA Influence Line for Reaction ,Moment & Shear for Indeterminate Structure Md. Enamus Salahin. ID:08.01.03.099 Dept. of Civil Engineering Ahsanullah University of Science & Technology
  2. 2. INFLUENCE LINE An influence line is a plot of the magnitude of the resulting reaction/axial force/shear/moment generated in a beam or structure as a unit load travels across its length. Influence lines can be generated for any of these actions (reactions, axial forces, shears, or moments) in a structure.
  3. 3. INFLUENCE LINE WHY REQUIRED??? * Dead loads are fixed in positions ---- Live loads can change their positions * Our objective is to establish how to position live loads (a truck or a train) to maximize the value of certain type of force (Shear or moment in a beam or axial force in a truss) at a designated section of a structure. * To establish maximum design forces at critical sections produced by moving loads, we frequently construct influence lines.
  4. 4. INFLUENCE LINE METHODS FOR CONSTRUCTION OF INFLUENCE LINE BRUTE FORCE METHOD[USES STATICS/MECHANICS TO CALCULATE THE INTERNAL LOAD OR REACTION] MULLER BRESLAU PRINCIPAL[DRAW INFLUENCE LINES BY APPLYING UNIT DISPLACEMENT] ****MULLER BRESLAU PRINCIPAL IS THE MOST GENERAL METHOD FOR CONSTRUCTING INFLUENCE LINE DIAGRAMS.
  5. 5. INFLUENCE LINE TYPES OF STRUCTURE **STATICALLY DETERMINATE **STATICALLY INDETERMINATE
  6. 6. INFLUENCE LINE
  7. 7. INFLUENCE LINE
  8. 8. INFLUENCE LINE INFLUENCE LINE FOR REACTION & MOMENT[INDETERMINATE BEAM]
  9. 9. INFLUENCE LINE INFLUENCE LINE FOR MOMENT[INDETERMINATE BEAM]
  10. 10. INFLUENCE LINE
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