Design of a column - Reinforced Concrete with FRP Bars: Mechanics and Design - page 329

Design of a column

9.1 INTRODUCTION

The floor plan of a two-story medical facility building is shown in
Figure 9.1. The building hosts two MRI units at the second level that are
located in bays AB-34 and BC-34. The floor system is a one-way fiber-
reinforced polymer (FRP) reinforced concrete (RC) slab spanning along
the east-west plan direction. The location of the building excluded the
presence of any snow load. The building is located in a region of low
seismicity. This design example describes the procedure to design col-
umn B3 (lower level). The frame considered in the analysis is displayed
in Figure 9.2.
Loads on each floor consist of the self-weight, a superimposed dead load
of 2.5 psf, and a live load of 100 psf (on both levels). The MRI equipment
load of 815 psf is included in the self-weight and is considered as uniformly
distributed over an area of 10 by 10 ft 2 (Figure 9.1). It is assumed that the
lateral load effects on the building are caused by a wind force of 100 kip
applied conservatively at the roof level, and that the dead and live loads are
the only sustained loads. A roof uplift pressure of 35 psf is also considered.
Wind loads are computed according to ASCE 7-10. 1
This example describes the procedure to design the first-story portion of
column B3 (Figure 9.3). The design is presented as a sequence of five steps
as summarized here:

Step 1 Define column geometry and concrete properties

Step 2 Compute factored loads

Step 3 Design FRP longitudinal reinforcement

Step 4 Design FRP shear reinforcement

Step 5 Check creep-rupture stress

1 ASCE 7-10, 2010, “Minimum Design Loads for Buildings and Other Structures,” American
Society of Civil Engineers, Washington, DC.

331