3.4 The required flexural (bending moment) strength is of a reinforced concrete beam is Mu= 260 kip-ft Determine which of the following reinforcing bar arrangements can be used for this beam. a) 6-#6 b) 4-#8 c) 3-#9 Material properties are: f'c = 5 ksi fy = 60 ksi 12" 24" #4 Stirrups 1in cover over the stirrups
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- 2) Find the axial stresses of menbers FD, GD, GE State if it is tensile or Compressive. 4M 3M A LE 3m G 20 RN Go KN(2) 4 0 5 211 5 4 #9 4 "1 16 #3" ft-k fé = 3 ksi, M = 90 NWC. The section is cracked. Computer the bending stresses in the beam by using transformed-area metho* TRUTT 50 kN/m 8m TIZI SLAB THICKNESS 150mm 2500 mm fe'= 21 MPa fy = 414 тра Cc = 40mm spacer barp=25mm Say bw= 0.6h DESIGN THE T-BEAM AND SHOW THAT TENSION STEEL YIELDS AND THE BEAM IS TENSION CONTROLLED
- 4 A flanged bolt coupling has ten 12-mm di ameter steel bolts on 500 mm diameter b olt circle and six 16 mm diameter aluminu m bolts on 300 mm diameter bolt circle. T he maximum shear stresses of the materi als are 60 MPa in steel and 40 MPa in al uminum. Use G = 80 GPa for steel and 3 0 GPa for aluminum. What is the maximu m required shear strength of each alumin um bolt to determine the maximum torqu e that can be applied to the system? Dra wing not included in this problem.The beam AB of length L = 2m is consisted of two attached materials which are a solid aluminum %3D 9. core ( E, = 27 GPa, (tallow), = 80 MPa ) of Da = 10mm and a tubular steel (G =80 GPa, %3D %3D a (Tallow ). = 240 MPa) cover of (D3)inner = 10mm, (D,) outer = 16mm. Determine the maximum %3D %3D S. torsion T that can be applied to the beam at B without causing yielding either in the aluminum core or steel cover a St Al 10mm a (a-a Cross-section) T 16 mm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 Help
- it a concrete encased steel composite column. It consists of a steel UC (universal column), with 8 additional steel longitudinal reinforcement bars which is then encased in concrete. Dimensions of the UC – obtain from Liberty Steel hot-rolled section properties product guide Spacing is the distance from the edge of the UC to the centre of the reinforcing bar Cover is the distance from the edge of the concrete to the centre of the reinforcing bar:Material properties are Esteel = 200 GPa Econcrete = 28 GPa, and both materials experience linearly elastic behaviour. The member is used as a column and is subjected to axial compression. UC type : 200UC52.2 steel bar diameter ds(mm): 16 spacing: 2.5 ds cover :70mm column height (L/duc):24 fsteel,max = 95MPa fconcrete,max= 12MPa strain (concrete)max = 425 x 10^-6 max shortening =2.25 mm the column must satisfy the various stress, strain and absolute shortening limits What is the maximum axial load P to satisfy all the design…PROBLEM 2: Determine the smallest safe cross-sectional areas, in mm?, of members Cl and CD for the wooden truss shown below. The working stresses are 10 MPa in tension and 8 MPa in compression. (The working stress in compression is reduced due to the danger of buckling.) 8 kN 4 kN 4 kN FINAL ANSWERS 4 kN 4 kN 4 kN - 4 kN Acı mm? K 3.5 m ACD mm2 A в с D E F PA - 6 @ 4 m = 24 mQ3: Analysis the composite structure shown in figure. The beam CD has El=40000 kN.m². the member AB has EA BOOKN. T 30kN 3m D -3m -2m-
- Problem 3: Find the design moment strength for the following section: f'e = 6000 psi hf=6" T a. Mn = fy =60 ksi Es = 29,000 ksi b = 24" 8" bw = 4" bw=4" k-ft A's = 2 in² As = 6.5 in² (total) d` = 1.5" d = 30" Strain StressH.W A Solid Steel bar of dlameter 6omm and length 350 mm is Placed inside an aluminum cylinder öf Inside diameter Femm and out side d lameter Ilomm, a comPressive load of looo lais applied on the assembly, find the stresses in the bar and the cylinder ? take Est = 200GPa and EAl = F0GPan %3D Cover Plate 0.25mm d- do 35omm A lum. cylinder Steel barDirect Stress Bronze Aluminum Steel A = 0.75 in.2 A = 1.0 in.? A = 0.5 in.? 3P 2F P 4P- -3 ft→ 5 ft 4 ft- 2. Axial loads are applied to the compound rod that is composed of an aluminum segment rigidly connected between steel and bronze segments. Find the largest safe value of P if the working stresses are 120 MPa for steel, 68 MPa for aluminum, and 110 MPa for bronze.