RC TERMINOLOGIES Flashcards
(50 cards)
a composite material made of concrete and steel reinforcement (usually rebar) that work together to resist different types of loads with concrete handling compression and steel handling tension.
REINFORCED CONCRETE (RC)
the maximum compressive stress that a concrete specimen can withstand without failure. This is typically determined by standardized tests on concrete cubes or cylinders.
COMPRESSIVE STRENGTH
the resistance of concrete to tensile forces. Concrete has low tensile strength, so it is usually reinforced with steel rebar to resist tensile stresses.
TENSILE STRENGTH
a measure of a material’s stiffness, specifically the ratio of stress to strain in the elastic range of concrete. For concrete, it’s generally lower than that of steel.
MODULUS OF ELASTICITY
the stress at which steel reinforcement begins to deform plastically. beyond this point, deformations become permanent. This is a critical factor in designing reinforced concrete structures.
YIELD STRENGTH
steel bars embedded in concrete to provide additional tensile strength. It is typically ribbed or textured to improve the bond with concrete.
REBAR (REINFORCING BAR)
the ability of a structure to resist shear forces, which are internal forces that cause sliding failure along a plane. In rc design, shear strength is often enhanced with stirrups or ties.
SHEAR STRENGTH
the minimum thickness of concrete layer around reinforcement to protect it from
corrosion and fire, as well as to ensure adequate bond strength.
COVER
the line within a cross-section of a beam where there is zero stress during bending. Above the neutral axis, concrete is in compression; below it, concrete
and reinforcement are in tension.
NEUTRAL AXIS
a property of a cross-section that indicates its resistance to bending or flexural stresses. In rc design, it affects the stiffness and deflection of
beams.
MOMENT OF INERTIA
the capacity of a beam or slab to resist bending, a critical factor in beam and slab design. It depends on the amount and placement of reinforcement and
concrete strength.
FLEXURAL STRENGTH
the ability of reinforced concrete to undergo significant deformation before failure. This property is largely provided by the steel reinforcement and is essential in
earthquake-resistant design.
DUCTILITY
the maximum load a structural member can carry before failure. It is used to design reinforced concrete elements under ultimate limit state conditions.
ULTIMATE LOAD
the load a structure is designed to carry safely during its life under normal conditions. This load is generally lower than the ultimate load.
SERVICE LOAD
closed-loop steel bars placed perpendicular to the longitudinal reinforcement in beams to resist shear and prevent diagonal cracking.
STIRRUP
a type of rc column with longitudinal reinforcement held together by closely spaced ties. it is commonly used in structures where bending moments are
minimal.
TIED COLUMN
the minimum length of rebar embedded in concrete needed to achieve the full bond and transfer stresses. Proper development length ensures adequate anchorage.
DEVELOPMENT LENGTH
the method of connecting two pieces of rebar in line to extend the length of
reinforcement. it can be achieved through overlapping or mechanical couplers.
SPLICING
concrete in which internal stresses are introduced through tensioned steel strands before applying external loads. This technique improves the strength and reduces cracks in concrete.
PRESTRESSED CONCRETE
methods used to limit crack width in concrete, such as appropriate reinforcement placement and spacing. Crack control is essential for durability, particularly in aggressive environments.
CRACK CONTROL
the time-dependent deformation of concrete under sustained load. Creep causes gradual elongation in concrete elements, which can affect long-term deflections and stress distribution.
CREEP
the reduction in concrete volume over time due to moisture loss, especially during the curing process. shrinkage can lead to cracking if not properly managed or reinforced.
SHRINKAGE
high-strength steel strands or wires used in prestressed concrete to provide
tensile force. tendons
TENDON
the adhesive force between rebar and concrete, which allows them to act together under load. good bond strength is crucial for transferring stresses effectively.
BOND STRENGTH
