27m 3m 4m 2 Toe Heel Example (6): Check the dam in example (5), for stability against overturning and sliding if the coefficient of friction between the dam base and the foundation is 0.65?
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- 六 Laboratory Problem Exercise #2 1m water surface Given the figure and the following data: 2m G. Determine (a) the width of base b on the conditions: 7 m a.1 The resultant intersects the base at the downstream edge of the middle third. GOY h a.2 If the factor of safety against overturning is 1.60 a.3 If the factor of safety against sliding is 1.20 T Yw = 1 m3 T Ye = 2.4- Which b among the three prevails? (Note T is ton) II (coefficient of friction between the base and foundation (b) Using the value of b that prevails in part (a), determine H = 0.60 b.1 the intersection of the resultant with the base b.2 the maximum and minimum pressure intensity at the base. % of seepage below the base is 60.1.) The specific weight of the concrete is 150 ??⁄??3, and the coefficient of friction between the base of the dam and the foundation is 0.42. If the factor of safety against overturning is 2, compute for the minimum width of the dam. CHOICES a.) 8.416 b.) 4.681 c.) 6.841 d.) 1. 684 2.) The specific weight of the concrete is 150 ??⁄??3, and the coefficient of friction between the base of the dam and the foundation is 0.42. Use 1.5 as the factor of safety (F.S) against sliding. Calculate the width of concrete dam that is necessary to prevent the dam from sliding. Unit of the Correct Answer: ft CHOICES a.) 5,783 b.) 7.358 c.) 3.578 d.) 8.357Dam Design. A concrete gravity dam is shown below (not drawn to scale). Determinethe depth of water, dw, allowed behind the dam if the required Factor of Safety against sliding is 2, theinterface friction angle between the concrete and the underlying soil is 25°, and the unit weight ofreinforced concrete is 25kN/m 3 . (Ignore failure due to overturning)
- Determine the mean spring constant ka of a rail support of an existing track section, the rail is loaded with a bogie with two equal wheel loads of 100 kN each. The sleeper spacing is 55cm and deflections per sleeper is summarized on the table. Sleeper # 1 2 3 4 5 6 7 8 9 O26.85 O 29.14 15.08 O 17.62 Sleeper Deflection 0.27 0.45 1.05 1.22 1.34 1.19 0.85 0.74 0.34A concrete gravity dam is shown below (not drawn to scale). Determinethe depth of water, dw, allowed behind the dam if the required Factor of Safety against sliding is 2, theinterface friction angle between the concrete and the underlying soil is 25°, and the unit weight ofreinforced concrete is 25kN/m 3 .1. Sm. l:sm. Im A concrete dam holds water as shown. If the specific gravity of concrete is 2.4 and assuming a hydrostatic uplift of full hydrostatic at the heel to zero at the toe, determine the factor of safety against sliding 15 m if the coefficient of friction between the base and the foundation is 0.75 5m
- Solve using the yield line method and then find max..W tent M +91 M/2 LL/2-+ L/3- +13-1. Minimum design dead load for a 6mm floor fill (sand). a 0.015 kPa b. 0.023 kPaC. 0.0017 kPa D. 00.90 kPa2.The performance characteristics commonly of interest in the design of structures are the following except:a. Stresses B. Deflectionsc. Support Reactions d. Loading Condition 3. These structures are composed of straight members connected at their ends by hinged connections to form a stable configurationa.Rigid Frames b. Beams c. TrussesD. Slabs4. It is the portion of the slab area whose load is carried by a particular member.a. One-way systemb. Two-way system C.Tributary width d. Tributary area5. These are the actions of other bodies on the structure under consideration.a. Internal Forces b. External Forces C.Support Reactions d. Couple Moment4- of the structure supported at the base with ....... appropriate springs and subjected to a base excitation. The study is performed on the simplified oscillator model. For flexible structures, the effect of interaction is to reduce the spectral acceleration. Dynamic analysis Direct Approach a) b) Evaluating the soil-foundation characteristics Determining the foundation input motion Boş bırak KÖnceki 4/20 Sonraki> Карat
- Example (3): Typical force ratios for a gravity dam are about 2 for overturning and 1.2 to 1.5 for sliding. Determine if these requirements are met on the dam in fig., assume a coefficient of friction of 0.7, a - 47 - Dams Design.. Dr. Ammar H. Kamel specific gravity for concrete of 2.4, full uplift forces on the dam base, and neglect earthquake and sedimentation force, (free board is Im)? 2m 1.5 10m Heel ToeQuestions 9. An RCC slab (M 25 grade) of dimensions 5 mx 5 mx 0.15 m, is supported on four square columns (M 25 grade) of side 400 mm, the clear height of each column being 3 m . Assuming rigid connections, the fundamental time period of vibration of the slab along the horizontal direction is nearly (use IS 456). (a) 4.12 s (b) 2.80 s (c) 0.50 s (d) 0.07 sA trapezoidal concrete dam is 20m high. The upstream face is vertical and the water is flush with the top, which is 3m wide. The coefficient of friction between the base of the dam and the foundation is 0.60. It is required to have a factor of safety of 3m for overturning and Knowing that the specific gravity of ancrete is 2.40. a.) Find the required width of the base. b.) Find the factor of safety against sliding c) Find the pressure at the heel and toe