1. Find the maximum concentratedService load that Can be applied on thebeam so that the crack days not that.knowing that n = 8; fr= 4MPa.Ans: P= 27,05 kJ20PIP 132m12m435mm500mm3030000We 20 W/m included tem7 weight)3.2. Calculate the stresses in steeland concrete for the positive trudingmoment. fr= 4MPa ; n=8.Ans: fe= 6-12MPf1=0fs = 72,841Calculate the extrasses in steeland concrete if applied service montequal 100 kl.m. fr=4=8Xus: fe=10MB; fl=0; f= =8484FigureBoo ma4. Design the beam as shown inby working stress method if uniformalydistribution load equal 20kN/m²; n = 10.beam width 300mm and allwable stresses(permissible). £= 140 MPa ; fc= 10MPa(Neglected dream weight)34301m5m3f3000060046201135 THA500mm400-0 00 0Aus: h=610mm ; steel 4630200mm1=2010/m4mStructural Design III

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Answered: 1. Find the maximum concentrated…

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.7P: Estimate the transverse tensile strength of the concrete in Problem 12.6.

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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…
Problem 3.2 (CE BOARD NOVEMBER 2003, CE BOARD NOVEMBER 2004) The lower ends of the three bars shown are at the same level before the 18 Mg block is attached. Each steel bar has an area of 600 mm 2 and E = 200 GPa. For the bronze rod, the area is 900 mm^2 and E broaze = 83 GPa. Fteel steel Sm a) Find the stress in the bronze rod. b) Calculate the axial stress in the steel rod c) Detemine the elongation of each rod.
GIVEN: Solid alumınum bar shown: 4 in. by4 in. E = 10 x 10° psi oy = 36 ksi 4000 2000 1b 4000 16 B 12' REQ’D: A) Load in each section of the bar (state whether C or T) PAB = Pac PCD = B) Maximum axial stress in the bar. In which section does this occur? C) Final length of the bar
1) A rectangular reinforced concrete beam with dimensions b = 14 in, d = 25 in, and h = 28 in is reinforced with three No. 10 bars. Material strengths are fy = 60000 psi and fc' = 5000 psi. a. Find the cracking moment based on the uncracked transformed section b. Determine the maximum moment that can be carried without stressing the concrete beyond 0.45fc' or the steel beyond 0.6fy. Hint: Assume maximum compressive stress in the concrete to be 0.45fc' and check whether the maximum steel stress reaches 0.6fy. This way you can check which one is reached first C. Find the nominal moment capacity of the beam
Q4
Determine 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
Two low alloy steel plates of 8 mm thick were welded together with a fillet weld joint and have 60 mm of the weld length which subjected to a nominal stress of 210.45 MPa. According to IIW sec XIII, the FAT class of the butt joint is 71 MPa at 2 million cycles and slope (m) of fatigue strength S-N curve is 3. Calculate the fatigue life of the joint using nominal stress approach.
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Problem 1: Determine the cracking moment for the following beam sections shown if f 'c = 28 MPa. wwww w 400 mm 800 mm 5-25 mm [ 60 mm 600 mm
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3. The block is subjected to a triaxial loading as shown. If v = 0.30 and E = 29 x 106 psi, determine the following: a) the single uniformly distributed load (in kips) in the x-direction that would produce and the same deformation in the y-direction as the original loading b) the single uniformly distributed load (in kips) that must be added in the load which exists in the x-direction to produce no deformation in the z-direction. HINT: No deformation in the z-direction means there is no strain in that specific direction but is still subjected to a particular stress. With that, correlating different strains by Poisson's ratio may not be applicable in this part. Use 6 decimal places for the solved values of strain and 3 decimal places in other values. y 60 kips 48 kips 54 kips 2" 54 kips 48 kips x. 3" 60 kips 4"

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