Math Problem Statement

Para la viga simple de la figura. Calcular la pendiente en A y la flecha máxima. EI es constante:

Para la viga simple de la figura. Calcular la pendiente en A y la flecha máxima. EI es constante:

Solution

The image shows a simply supported beam with a central point load of 600 kg applied at the center (C), with the distances from the supports (A and B) to the load being equal (4.5 m each).

To calculate the slope (or pendiente) at point A and the maximum deflection (or flecha máxima) of the beam, we use formulas derived from beam theory under bending. Since EIEI (modulus of elasticity multiplied by the moment of inertia) is constant, we can apply these formulas for a beam with a central load.

Step 1: Convert the Load to Newtons

Given that the load is 600 kg, we convert it to Newtons: W=600kg×9.81m/s2=5886NW = 600 \, \text{kg} \times 9.81 \, \text{m/s}^2 = 5886 \, \text{N}

Step 2: Use Deflection and Slope Formulas for a Central Load

For a simply supported beam with a central load PP, the slope at the ends (A or B) and the maximum deflection occur at the midpoint. The formulas for these are:

  • Slope at A (or B): θA=PL216EI\theta_A = \frac{PL^2}{16EI}
  • Maximum deflection (at C): δmax=PL348EI\delta_{\text{max}} = \frac{PL^3}{48EI} Where:
  • PP is the central load (5886 N),
  • LL is the length of the beam (9 m total, 4.5 m on each side),
  • EIEI is the flexural rigidity (constant).

Step

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Math Problem Analysis

Mathematical Concepts

Statics
Beam Deflection Theory
Structural Analysis

Formulas

Slope at A (or B): θ_A = (P * L^2) / (16 * EI)
Maximum deflection: δ_max = (P * L^3) / (48 * EI)

Theorems

Beam Deflection Formulas for Central Load

Suitable Grade Level

College/University Level (Engineering)