Reinforced Concrete Design
Reinforced concrete is a composite material consisting of concrete and intimately bonded steel reinforcing bars. A typical reinforced concrete cross section is shown in Fig. 11.1. The reinforcing steel is always present in the portion of the cross section which experiences tensile stresses under load. In some cases, such as in columns and doubly reinforced beams (Fig. 11.2), steel is placed in the compression zone. The purposes of such steel are to increase the load capacity over singly reinforced sections, properly reinforce sections which are subject to stress reversals, increase the load capacity of column sections, and provide resistance to tensile stresses, which are caused by accidental eccentricities, buckling, and combined axial and flexural loads in compression members.
KeywordsReinforce Concrete Concrete Beam Live Load American Concrete Institute Moment Capacity
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