H.w... for the uniformly loaded isotropically reinforced slab shown in the figure, determine the collapse load Wn. Assume that the plastic moment of resistance per meter width of slab for negative and .positive sections is Mn 28 Mode 2 H. W
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- Prestressed hallow core slabs with typical section shown are used for flooring of a library. Properties of the slab are as follows: A = 14 x 105 mm?; S, = S, = 6.8 × 10€ mm?; a = 1.2 m; b = 200 mm. The slab is prestressed with 920 kN force at an eccentricity e = 63 mm below the neutral axis of the section. Slab weight is 2.7 kPa, superimposed DL = 2.0 kPa; LL = 2.9 kPa. The slab is simply supported on a span of L = 8 m. Allowable stresses at service loads are 3.2 MPa in tension and 15.5 MPa in compression. Consider 20% loss of prestress at service loads. 1. Compute the maximum compressive stress (MPa) in the slab due to initial prestress force. A. 2.54 B. 12.6 C. 1.95 D. 15.1 2. Determine the maximum stress (MPa) at the bottom of the slab due to service loads and prestress force. A. 1.35 T В. 9.17 C c. 1.35 C D. 9.171 3. Determine the maximum additional load (kPa) including its own weight, that the slab can be subjected to if the allowable stresses at service loads are not to be…In a particular project, the vertical compressive stress at a point of focus in a soil is 100 kPa while the horizontal compress stress at the same point is 57 kPa. Both stresses are principal stress. (1) Where is the center of the Mohr-circle that describes the 2D stress at the point? (2) What is the maximum shear stress that acts at the point?r = 0.675" The bar shown, thickness t = ½", width, D= 3" and a hole of radius, r= 0.675" is under and average Oavg = 4 ksi Oavg = 4 ksi stress of 4ksi. What is the value of the maximum D = 3" stress near the hole?
- 11. (a) Plot Mohr envelopes of strength for (1) = 0°, (2) = 30°, (3) = 60°, and (4) = 90° for the slate whose strength anisotropy is described by Equation 3.18a and 3.19a. (b) Plot the peak compressive strength of the slate as a function of for (1) 03 = 0 and (2) σ3 = 30 MPa.This is a mechanics of deformable bodies problemProblem 266 At 20°C, a rigid slab having a mass of 55MG is placed upon two bronze rods and one steel rod as shown. At what temperature will the stress in the steel rod be zero? For the steel rod, A=6,000 mm2, E=200 x 10' N/m2 and a=11.7 um/(m C). For each bronze rod, A=6,000 mm?. E=83 x 10 N/m2, and a=19.0 um/(m°C). M 23Dmm Bronze Steel Bronze
- this is a rock mechanics class. Thanks for your help and explainationH.M..... An isotropically reinforced. Square two way slab is supported as shown in the figure below and is subjected to a uniformly distributed load W. using the principle of virtual work, determine the collapse load Wn. The plastic moment of resistance per .meter width of the slab is Mn H.W Mode 2 H.W a) ±ve mom. Mn tve mom=Mn -ve mom.al-2nn 内容Due to loading, the plate is deformed into the dashed shape shown in the figure. Assume a = 39 in., b= 33 in., δ1= 0.1625 in., δ2= 0.1 in. Determine the average normal strain along the side AB? Determine the average shear strain in the plate at A relative to the horizontal and vertical axes? In micro rad
- 2. The following square section is subjected to an unsymmetric bending moment M=850 Nm, as shown. Compute the stresses at each of the 4 outer corners of the section, and sketch a 3D distribution of the stresses 2 B M=850 Nm mm 260 E 25 A D 250 mm REQ'D - stress at each corner - 3D stress distributionA clay sample was tested in the laboratory for unconfined compressive test. Determine the undrained shear strength if the unconfined compressive strength is 50kPA. (Answer in kPa only value without unit.)50% Due to loading, the plate is deformed into the dashed shape shown in the figure. Assume a = 32 in., b= 40 in., δ1= 0.225 in., δ2= 0.075 in. Determine the average normal strain along the side AB? Determine the average shear strain in the plate at A relative to the horizontal and vertical axes?