GIVEN; Steel / wood composite beam with cross-section shown Mmax = 1.5 x 10° in-lb Estel = 30 x 10º psi Ewood - 3 x 10° psi 11.5" REQ'D: A) Sketch transformed cross-section above. B) Calculate the transformed moment of inertia C) Maximum bending stress in the wood D) Maximum bending stress in the steel
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- く> Q Search MT ACTIVITY 2M Close Activity File Home Insert Draw View Help Open in Desktop App O Tell me what you want to do v11 I U クv Av S A。 ニvニ A Styles v E Tags v abc Calibri ... Teams SW Assignments The composite bar shown in Fig. P-273 is firmly attached to unyielding supports. An axial force P = 50 kips is applied at 60°F. Compute the stress in each material at 120°F. Assume a = 6.5 × 10 6 in/(in-°F) for steel and 12.8 × 10-6 in/(in·°F) for aluminum. 国 Calendar Calls Files ... Aluminum A = 2 in? E = 10 x 10° psi Steel A = 3 in? E = 29 x 10° psi 田 15 in 10 in HelpC100 x 8. Angle 100 x 75 x 6 The composite shape shown below was manufactured by welding a structural steel angle shape to a standard C-channel. a) Delermine the location of be horzontal Centroidal axis ol the composile shape, b) Compute the arca moment of mertia with respect to the honzontal cetroidal axisA 300 mm X 500 mm exterior beam is reinforced with 25 mm main bars and 12 mm stirrups. The tension side has a steel area of 2450 mm² and the compression side has a steel area of 1480 mm². 60% of the tension steel area is laid out on the first layer, the remaining is on the second layer and the compression steels are on a single layer. Determine the following if the steel yield strength of the compression steel is 276 MPa, the steel yield strength of the tension steel is 415 MPa and the depth of the tension zone 340 mm: a. The compressive stress in the concrete. b. The net tensile stress. c. Ultimate Moment Capacity of the beam.
- Two pieces of wood are glued together, find the maximum load which the glued wood could carry that must not exceed 12 MPa normal stress and 7 MPa shear stress. P 30° P 100 mm Glued Section 100 mmA composite bar is rigidly attached to the wall at A as shown, Axial loads are applied at the positions indicated. Which of the following most nearly gives the axial stress in member AB? Bronze E = 83 GPa $ 100 mm Steel E= 200 GPa O 80 mm 1,200 kN 900 kN A B 2.50 m 3 m; Select the correct response: 179.05 MPa 38.20 MPa 59.58 MPa 114.59 MPaA 5 ft. long laminated wood beam is built up by gluing together three 2” x 6” boards to form asolid beam 6” x 6” cross section, as shown in the figure. Calculate the maximum allowable valueof P (lb.) such that both the (1) allowable shear stress in the glued joints of 100 psi and the (2)allowable bending stress of 1200 psi is not exceeded. (Disregard the weight of the beam).[Formula: Bending Stress: = (M)(y)/I; max = (M)(c)/I; Transverse Shear Stress: =(V)(Q)/(I*t); max = (V)(QNA)/(I*tNA)]
- A beam is fabricated by gluing four dimension lumber boards, each 40 mm wide and 80 mm deep, to a 30 mm x335 mm plywood web. Determine the maximum allowable shear force and the maximum allowable bending moment that this section can carry if the allowable bending stress is 5.7 MPa, the allowable shear stress in the plywood is 545 kPa, and the allowable shear stress in the glued joints is 240 kPa. 80 mm (typ) 30 mm- Answers: Vmax 2 110 mm Mmax = 1.982 335 mm JkN kN-mSeatwork The beam shown is prestressed by using a bonded (stress relieved tendons) with a specified tensile strength of prestressing tendons strength fpu=1350 MPa, fc'=35 MPa. The area of prestressed reinforcement in tension zone Aps=1000 mm?. The specific yield strength of prestressing tendons sd, foy=1160 MPa. а. What is the value of the stress in prestressed reinforcement at nominal strength (Aps) b. What is the value of the depth of the compression block. С. What is the ultimate moment capacity of the prestressed beam. 0.85fc' 430 NA |(d-a/2) · A=1000 T=Ap.Sps 250Problem 1 Considering flexural buckling, determine the allowable and design compressive strength using L = 5m (A = 6,265mm2, rx = 106.43mm, ry = 49.28mm %3D %3D W10× 33 L A992 steel
- III. Locate the centroid of the composite area below. Y 50 80 mm, mm R=50mm 250mm R=65mm -- X 50 50 mm mmFill in the blanks: Determine the required tension steel area of the T beam with given properties below. Width of flange bf= 500 mm Width of web bw = 400mm Thickness of flange tf 140 mm Effective depth d = 380 mm Effective concrete covering d' = 75 mm Compressive strength of concrete fc' = 30 MPa Yield stress of steel bar fy = 300 MPa Mu = 448 kN-m As = mm2 CS Scanned with CamScannerDetermine the prestressing steel area required for the precast concrete T-beam. Use the following data: Total moment = 250 kN-m Effective stress fse= 862 MPa Allowable concrete stress = f.=11 MPa Consider zero stress at the bottom of the beam I=3673x106 mm4 A=103125 mm² Eccentricity = 271.6 mm Centroid of steel is located at 100 mm from the bottom of the beam. Select one: a. 591.97 mm b. 789.29 mm 2. C. 443.98 mm 2. d. 986.61 mm