Answered: Qudei) Quhei) B B (b) (a) Figure 4.31…

Qudei) Quhei) B B (b) (a) Figure 4.31 Continuous foundation subjected to eccentrically inclined load: (a) partially compensated case and (b) reinforced case Qulei) = 9„B[ 1 - B°2-(D/B) 1 B

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter8: Mat Foundations

Section: Chapter Questions

Problem 8.5P

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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

Consider a continuous foundation of width B = 1.4 m on a sand deposit with c' = 0, Φ' = 38° and γ = 17.5 kN/m³. The foundation is subjected to an eccentrically inclined load (see Figure 4.31). Given: load eccentricity e = 0.15 m, D_f = 1 m, and load inclination β = 18°. Estimate the failure load Q_u(ei) per unit length of the foundation a. for a partially compensated type of loading [Eq. (4.85)]
b. for a reinforced type of loading [Eq. (4.86)]

Qudei)
Quhei)
B
B
(b)
(a)
Figure 4.31 Continuous foundation subjected to eccentrically inclined load:
(a) partially compensated case and (b) reinforced case

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