What is the purpose of the compressive stress check in the design process for a reinforced concrete T-beam?
To ensure the concrete has compressive
... [Show More] capacity well and above that which is required based on the analysis method which ignores compression in the web and assumes a constant value for compressive stress in the flange, at the depth of the flange.
Information regarding concrete design incorporated into building codes is provided by what agency?
(ACI) American Concrete Institute
What type of section is preferred for reinforced concrete beam design in order to prevent catastrophic failure?
Underreinforced Section: Ductile Failure-cracks concrete, lets people know first
For a reinforced concrete, rectangular beam section, the variables h, a, d, b, C, T stand for what, respectively?
overall height, depth of compressive stress block, effective depth, overall width, compressive force, tensile force
Eccentricity is the amount by which an axis deviates from another parallel axis
True
For a singly reinforced concrete beam, the steel is assumed to resist all the tensile stresses and concrete is assumed to resist all the compressive stresses
True
Since concrete is typically poured in forms extending across several columns, or as a slab extending over several beams, concrete structures are considered to be continuous
True
For a rectangular beam section classified as underreinforced, code provides minimum area requirements for reinforcements
False, not area -help?
In the following equation, the variable rho (p) is applied a safety reduction factor: As = pbd
not safety reduction -percentage
The height of a reinforced concrete beam is the depth of the section measured from the compression face to the centroid of the tension reinforcement
Face, not the height -extreme depth
Proper curing is vital to the quality of the concrete
True
Diagonal tension stress can be counteracted by using either stirrups or some of the tension steel bent up at a 45-degree angle
True
The portion of a T-beam that responds to shear is the rectangular section
True
The resistant factor used for shear in reinforced concrete beams is 0.9
False, its .75
The minimum bar size for longitudinal reinforcement in tied and spiral columns is #8
False it's #5
The minimum and maximum amount of area of steel for reinforced concrete column design is 1% and 8% of the gross column area, respectively, with a practical limit of 6%
False, not 6% -4%
The minimum side dimension for a rectangular concrete column is 6 inches
False, not 6 in. -help
The minimum number of code required longitudinal bars for a spiral column is six
False, for square it's at least 4 bars
Lateral reinforcement is placed within a concrete column to restrain the vertical reinforcing and prevent buckling
True
A #3 stirrup will work for shear in a reinforced concrete beam if the code required minimum area of steel to be provided is .23in ^2
False, not .23in^2 -.22in ^2
Isolated, edge, and symmetrical are all types of T-beam conditions
True
For shear reinforcement design, the code requires the use of minimum reinforcement even when the maximum computed shear stress falls below the capacity of the concrete (less than 1/2 resistance factor of shear concrete stress)
True
Columns that are eccentrically loaded have an interaction response, a combination of axial compression an bending
True
The maximum shear for a critical section in a reinforced concrete beam is computed at a distance d form the face of the support
True
The maximum shear for a critical section in a reinforced concrete beam is computed at a distance d from the face of the support
True
The top section of a T-beam is the web and the bottom section is the flange
False, the top is the flange and the bottom is the web
Concrete has some capacity to resist shear forces
True [Show Less]