The figure shows a cast-in-place reinforced concrete spread footing for an interior column that is concentrically loaded. Punching shear controls the footing thickness in the design. Neglecting the shear strength of reinforcing, the design punching shear capacity of the footing (kips) per ACI 318-11, excluding Appendix C, is most nearly:

The figure shows a cast-in-place reinforced concrete spread footing for an interior column that is concentrically loaded. Punching shear controls the footing thickness in the design. Neglecting the shear strength of reinforcing, the design punching shear capacity of the footing (kips) per ACI 318-11, excluding Appendix C, is most nearly:

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

The figure shows a cast-in-place reinforced concrete spread footing for an interior column that is
concentrically loaded. Punching shear controls the footing thickness in the design. Neglecting the
shear strength of reinforcing, the design punching shear capacity of the footing (kips) per
ACI 318-11, excluding Appendix C, is most nearly:
(A)
(B)
(C)
(D)
870
680
560
420
10 ft
1 ft
1 t
10 it
PLAN
Pu
#8 BARS (EACH WAY)
58/104
2 ft I
fe = 3,000 psi
d = 20 in.
ELEVATION

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