Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 14, Problem 14.14P
The elevation and plan of a bracing system for an open cut in sand are shown in Figure 14.21. Using Peck’s empirical pressure diagrams, determine the design strut loads. Given: γsand = 18 kN/m3, ϕ' = 38°, x = 3 m, z = 1.25 m, and s = 3 m.
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Principles of Geotechnical Engineering (MindTap Course List)
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- Pls show step by step and formula usedarrow_forwardA: Wel Question 2 (a) A simple circular hollow section (CHS) tubular K-joint in a steel structure, subjected to balanced axial loading, is illustrated in Figure 2a. Determine the maximum hot spot stress at the joint intersection of the chord and the loaded brace B. (b) The steel structure is installed in the seawater with cathodic protection. Determine the number of stress cycles to failure based on the maximum hot stress range obtained in part (a). Use the NORSOK standard. (Refer to S-N curves for tubular joints in air environment and seawater with cathodic protection). (c) Estimate the number of load repetitions required to induce fatigue failure in the tubular joint, based on the load history provided in Figure 2b. The nominal yield and ultimate tensile strength are 355 N/mm² and 510 N/mm², respectively. Assume a damage limit of 1.0. Use the Modified Goodman formulation to determine the equivalent completely reversed stress. (d) Describe briefly the procedure to determine the hot…arrow_forwardThe steel member is a fillet welded built-up section that comprises two flange plates (100mm x 20mm) and a web plate (250mm x 10mm) as depicted in Section A-A. The leg size of the weld is 8 mm. Use an appropriate consequence class. Based on the damage tolerant method and the modified Goodman equation. Determine an equivalent completely reversed stress. Ignore the vibration and dynamic amplification. Use Euro-code 1993-1-9. (a) Calculate the maximum and minimum stresses at steel member section A-A. (b) Check the fatigue resistance of the steel member at Section A-A using the fatigue limit. (c) Discuss the possible failure mode of the steel member due to fatigue loading. State your design assumptions, if any. Steel plate (Flange) 100mm x 20mm 10.0 m Fillet weld (manual) (Typical) Steel plate (Web) 250mm x 10 mm Steel plate (Flange) 100mm x 20mm Section A-A Fixed end Welded built-up steel section 5.0 m A 2.5m 3.0 m Fatigue load range 5 kN A Total weight of steel section Total weight of…arrow_forward
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