A gravity dam of trapezoidal cross section with one face vertical and horizontal base is 22m high and has a thickness of 4m at the top. Water upstream stands 2m below the crest of the dam. The specific gravity of masonry is 2.4. A. Considering uplift pressure to vary uniformly from full hydrostatic pressure at the heel to zero at the toe: 1. Find the base width B of the dam so that the resultant force will act the extremity of the middle third near the toe. 2. Compute the maximum and minimum compressive stresses acting against the base of the dam. 6.

A gravity dam of trapezoidal cross section with one face vertical and horizontal base is 22m high and has a thickness of 4m at the top. Water upstream stands 2m below the crest of the dam. The specific gravity of masonry is 2.4. A. Considering uplift pressure to vary uniformly from full hydrostatic pressure at the heel to zero at the toe: 1. Find the base width B of the dam so that the resultant force will act the extremity of the middle third near the toe. 2. Compute the maximum and minimum compressive stresses acting against the base of the dam. 6.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A concrete gravity dam has the following data: Maximum water level = 300.00 m Bed level = 220.00 m R.L top of dam = 304.00 m %3D The d/s slope of 0.67:1 starts at RL of 295.00 m U/s face is vertical. Center line of the drainage gallery = 8.0 m from u/s face. Consider only weight of dam, water pressure and uplift pressure. Calculate only the normal stresses at the toe and heel of the dam, assuming 100% uplift pressure at the h eel and 50% at the gallery and zero at the toe.
A gravity dam of trapezoidal cross section shown below, with one face vertical and a horizontal base is 20 m high and 4 m thick at the top. The water at the upstream vertical face stands 2 m below the crest of the dam. The specific gravity of the masonry is 2.4. Compute the base width of the dam when the resultant force will cut the extremity of the middle third considering the uplift pressure force varies uniformly 100% from heel to zero at toe.
A concrete gravity dam with a trapezoidal section is holding water as shown in the figure. A distance of 15 meters from the toe, a drain is located. The drain has a pressure due to uplift of zero and increasing uniformly to full hydrostatic at the heel. Upstream face 1H:5V, while downstream face is inclined 1H:2V. Which of the ff nearly gives the maximum foundation pressure on the base of the dam in kilopascal ? Assume 23.54 kN/m3 for the unit weight of concrete. a. 3114 b. 1095 c. 4115 d. 964 e. 680
A concrete dam is triangular in cross section and (30+0.314)m high from the horizontal base. If water reaches a depth of (27+0.314)m on the vertical face, what is the minimum length of the base of the dam such that the resultant will intersect the base within the middle third? What minimum coefficient of friction is required to prevent sliding ? Determine the pressure distribution along the base. If the uplift pressure varies from half full hydrostatic at the heel to zero at the toe.
A dam is triangular in cross section with the upstream face vertical. Water is flush with the top. The dam is 8 m high, 6 m wide at the base and weighs 23.5 kN/m3 . The coefficient of friction between the base and the foundation is 0.80. There is hydrostatic uplift that varies from full hydrostatic pressure at the heel to zero at the base. b.) Determine the factor against overturning.
A damn having a triangular section has a vertical face 24 m high and base 12 m wide. Use sg=2.4 a. determine the height of water that could rise on the vertical side of the dam so that the maximum intensity of pressure at the toe is twice the average pressure at the base. Neglect hydrostatic uplift. b. What is the shearing stress at the base?
A trapezoidal dam having a top width of 0.60m and a bottom width of 1.2m is 1.8m high. The depth of water on the vertical side of the dam is 2.4m. Unit wt. of concrete is 23.5 kN/m3. Neglecting hydrostatic uplift. Determine the total horizontal hydrostatic force acting on the dam, the factor of safety against overturning and the factor of safety against sliding if coefficient of friction between the dam and the soil is 0.80.
A masonry dam of trapezoidal cross section, with one face vertical has thickness of 60cm at the top, 3.70m at the base, and has a height of 7.40m. What is the depth of water on the vertical face if the resultant intersects the base at the downstream edge of the middle third? Assume that the uplift pressure varies uniformly from full hydrostatic at the heel to zero at the toe
A trapezoidal dam with vertical upstream face is 6m high, 0.6m at the top and 3m wide of the bottom. Unit weight of concrete is 23.5 kN/m^3 Using the computed depth of water, compute the hydrostatic uplift force (pound-force) if the uplift varies from full hydrostatic pressure at the heel to zero at the toe using yards instead of meters
A dam with vertical upstream face is 6.5 m high, 3.2 m wide of the bottom and 0.5 m at the top. Considering 1 m strip of the entire dam. 1. Find the depth (in meter) of water on the vertical upstream face if pressure at the toe is twice the average pressure at the base. Weight of concrete is 23.60 kN/m^3. 2. Find the hydrostatic uplift force (in newton) if varies from full pressure at the heel to zero pressure at the toe. 3. Factor of safety against sliding, u = 0.8 4. Factor of safety against overturning.
A masonry dam of trapezoidal cross section, with one face vertical, has a thickness of 1m at the top and 3m at the bottom. It is 7m high and has horizontal base. The vertical face is subjected to water pressure, the water standing 4.5m above the base. The weight of the masonry is 23.5kN/cu.m. Assuming no hydrostatic uplift, where will the resultant pressure intersect the base, and what will be the intensity of pressure at the heel and toe.
5. What is the factor of safety against overturning for the triangular dam? Determine the pressure distribution at the base of the dam. Neglect hydrostatic uplift. Use unit weight of concrete 24kN/m³.