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Structural Concrete - Hassoun

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Problems 187<br />

Figure 4.17 Problem 4.14.<br />

Figure 4.18 Problem 4.15.<br />

Given: L = 20 ft, b = 12 in., and h = 24 in. Use d = 18 in. for one row of bars and d = 17 in. for two rows.<br />

Assume f c ′ = 4ksiandf y = 60 ksi.<br />

4.15 The two-hinged frame shown in Fig. 4.18 carries a uniform dead load of 3.93 K/ft and a uniform live<br />

load of 2.4 K/ft on BC. The reactions at A and D can be evaluated as follows: HA = HD = wL/9 and<br />

RA = RD = wL/2, where w is the uniform load on BC. A typical cross section of the beam BC is also<br />

shown. It is required to:<br />

a. Draw the bending moment diagram for the frame ABCD.<br />

b. Design the beam BC for the applied factored moments (positive and negative).<br />

c. Draw the reinforcement details of BC.<br />

Given: f c ′ = 4ksiandf y = 60 ksi.

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