30 kip 4 kip' · ft

The point loads are placed at the fixed positions shown in the figure and they are live loads. A k a b a b dn = 1₂ Icr= M B 7 Ast Stress profile (concrete) Cross section before cracking Aso Cross section Asc Ast N.A. Q2) Now, the live load increases gradually and the moment at the critical section just exceeds the cracking moment (Mcr), but the compressive section of the concrete is still under the linear elastic region. Please be reminded that in the flexural design, the crack of the concrete section starts where the tensile stress reaches the tensile strength. It is assumed that the cracks then propagate rapidly up to the entire tension section (up to the neutral axis) and this cracked concrete section cannot resist the tension. It should be noted that in reality, concrete sections between the primary cracks can still resist some tensile stresses as shown in the figure, which should be considered in the displacement design. However, in flexure design, we design the critical section…

The aluminum bar ACDB is rigidly connected to a steel tube in CD. The data is presented in the table. If the load P is equal to 125 kN, determine: The stress of aluminum in segment AC. Answ: 63.66 MPa The stress of aluminum in segment CD. Answ: 13.93 MPa The stress in steel in segment CD. Answ: 39.79 MPa The total deformation of the bar. Answ: 0.29273 mm

Consider the compound system consisting of three sections with cross-sectional areas 3A, 2A, and A and loaded as shown. Which of the following gives the maximum average normal stress in the system shown? 6P 4P A5.5 P/A B.4.5 P/A 3A 2A A 3P C.4 P/A D.3 P/A 4P 6P Which of the following is the highest value of stress within the strain hardening region of a typical elasto-plastic material subjected to tensile test? A. Elastic Limit B.Yield Stress C.Ultimate Stress D.Proportional Limit What is the lateral strain of a uniaxially loaded member if its longitudinal strain is 0.02 and its Poisson's ratio is equal to 0.3? A.+0.006 B.-0.006 C.+0.667 D.-0.667 Which of the following is the highest value of stress within the elastic region of a typical elasto-plastic material subjected to tensile test? A.Yield Stress B.Elastic Limit C.Ultimate Stress D.Proportional Limit

In the following beam system, the beam is subjected to uniform distributed load W = 25 lb /in. Assume a = 90-inch, b = 130-inch, C = 40 inch and d = 50 inch a)  Determine the resultant force produced at the pin C for the distributed load, W b)  What is the factor of safety that exists for pin C with respect to its fracture strength? assume that the pin at C fractures when the resultant force reaches a value 35000 lb.

A 42 meter solid shaft is under torsional loading 53 Nm. If in this application, the allowable shear stress for the material is 369 MPa.    Calculate the required minimum diameter of the shaft: _____ mm ( input the value directly from your calculation before rounding it up to an engineering accepted diameter) Pay attention to units, and calculate your answer to one decimal place.

N = 7

Q5) The wooden block shown in Figure (4) will fail if the shear stress acting along the grain is (3.85 MPa). If the normal stress (d, = 2.8 MPa), determine the necessary compressive stress (a) that will cause failure. Figure (4)

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