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6th Edition

Segui + 1 other

Publisher: Cengage Learning

ISBN: 9781337094740

Chapter 9, Problem 9.8.6P

Textbook Problem

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Same as Problem 9.8-5, but use ASD.

To determine

**(a)**

Selection of

**Given:**

Thickness of slab, t = 4 inches, spacing = 8.0 ft, span length, L = 36 feet, height of the deck rib, H =2 Inches.

Construction load = 20 psf, partition load = 20 psf, ceiling load =8 psf and live load = 100 psf.

The value of

**Calculation:**

The loading condition on the beam is as follows:

The loading after curing.

Where, the thickness of the slab is

Calculate the dead load on the beam after curing as follows:

Where, W_{D} is the dead load on the beam,

Substitute the values in the above equation, we get:

Compute the live load on the beam using following equation.

Where,

Substitute the values, we get:

Calculate the factored uniformly distributed load after curing has completed by following formula:

Where,

Substitute the values, we get:

Calculate the bending moment acting at the center.

Where,

Let’s try for

From the table 3-19 for the plastic neutral axis at 4 inches from top:

We have the effective flange width as follows:

Where,

Now for selecting the shape of the composite section as follows:

Calculate the distance from the top of steel shape to compressive force in concrete :

Location of the plastic neutral axis from the top of the slab is as follows;

Substitute the values, we have:

Compute the distance of the plastic neutral axis from the top of the concrete slab as follows;

As the neutral axis lies in concrete slab, the full area of steel is in tension and the tensile force of

concrete below the neutral axis is neglected.

Substitute the values in the above equation, we get:

Compute the value of Y_{2} (distance between top of the steel to the centroid of the concrete)

below:

To determine

**(b)**

Number of shear studs required.

Steel Design (Activate Learning with these NEW titles from Engineering!)

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