Design of a T-beam - Reinforced Concrete with FRP Bars: Mechanics and Design - page 243

Design of a T-beam

7.1 INTRODUCTION

The floor plan of a two-story medical facility building is shown in
Figure 7.1. The column spacing is dictated by the size of the equipment that
occupies the ground floor. The second floor system is a one-way RC slab
spanning along the east-west direction. The building is located in a region
of low seismicity. This example describes the procedure to design beam
AB-3. Loading of each floor consists of the self-weight, a superimposed
dead load of 2.5 psf, and a live load of 100 psf.
The design is discussed as a sequence of nine steps as summarized here:

Step 1 Define beam geometry and concrete properties

Step 2 Compute factored loads

Step 3 Compute ultimate and service bending moments and shear forces

Step 4 Design FRP primary reinforcement for bending moment capacity

Step 5 Check creep-rupture stress

Step 6 Check crack width

Step 7 Check maximum midspan deflection

Step 8 Design FRP reinforcement for shear capacity

Step 9 Compute FRP contribution to torsional strength

The beam design is summarized in the next section and discussed in
detail in the following ones.

7.2 DESIGN SUMMARY

Considering a T-beam of dimensions 14 in. (b w ) by 28 in. (h), the following
loads are considered:

Dead load 2.31 kip/ft

Live load for positive moments 1.29 kip/ft

Live load for negative moments 1.05 kip/ft

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