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(7 Problem 1. The concrete (y = 150 lb/ft³) dam shown below retains water (y = 62.4 lb/ft³) at a depth of 20 ft. The tailwater depth is zero and use a width of 1 ft. 425 ft 20 ft a. Calculate the three forces on the dam in terms of L. b. Sum moments about the dam base centerline and calculate the required minimum L that maintains compression at the dam base, or when eN = L/6. c. The foundation rock has an angle of internal friction = 43° with cohesion c = 1900 lb/ft². Determine the Factor of Safety against sliding using the L calculated above.

(7 Problem 1. The concrete (y = 150 lb/ft³) dam shown below retains water (y = 62.4 lb/ft³) at a depth of 20 ft. The tailwater depth is zero and use a width of 1 ft. 425 ft 20 ft a. Calculate the three forces on the dam in terms of L. b. Sum moments about the dam base centerline and calculate the required minimum L that maintains compression at the dam base, or when eN = L/6. c. The foundation rock has an angle of internal friction = 43° with cohesion c = 1900 lb/ft². Determine the Factor of Safety against sliding using the L calculated above.

Structural Analysis
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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(7 Problem 1. The concrete (y = 150 lb/ft³) dam shown below retains water (y = 62.4 lb/ft³) at a depth of 20 ft. The tailwater depth is zero and use a width of 1 ft. 425 ft 20 ft a. Calculate the three forces on the dam in terms of L. b. Sum moments about the dam base centerline and calculate the required minimum L that maintains compression at the dam base, or when eN = L/6. c. The foundation rock has an angle of internal friction = 43° with cohesion c = 1900 lb/ft². Determine the Factor of Safety against sliding using the L calculated above.
Transcribed Image Text:(7 Problem 1. The concrete (y = 150 lb/ft³) dam shown below retains water (y = 62.4 lb/ft³) at a depth of 20 ft. The tailwater depth is zero and use a width of 1 ft. 425 ft 20 ft a. Calculate the three forces on the dam in terms of L. b. Sum moments about the dam base centerline and calculate the required minimum L that maintains compression at the dam base, or when eN = L/6. c. The foundation rock has an angle of internal friction = 43° with cohesion c = 1900 lb/ft². Determine the Factor of Safety against sliding using the L calculated above.
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