Design of a Beam for Which b and d Are Not Known A beam is to carry its own dead load plus a uniform service live load of 25.5 kN/m and a uniform superimposed service dead load of 14.5 kN/m on a 10-m span. Select b, d, and A, if f is 25 MPa and fy is 420 MPa.
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- Q5: Answer Only One A precast T beam is to be used as a bridge over a small roadway. Concrete dimensions are bw= 400 mm, hf 125 mm, and h= 750 mm. The effective depth d= 600 mm. Concrete and steel strengths are f 'c= 38 MPa and fy = 420 MPa, respectively. Determine the design moment capacity of the girder. The beam is used on a 5 m simple span. A) b = 1300 mm B) b = 1200 mm %3D %3D %3D %3D %3DA T-beam that must carry a service load of 40 kN/m and dead load of 43 kN/m (including self- weight), on a 6.71 m simple span, is limited in cross section for engineering reasons to bw = 400 mm, d=430 1264 mm bf = 1200 mm, hf = 80 mm. Determine (and) for the beam. Assume the designer intends to use: fé-20 MPa and fy = 400 MPa.A 66-foot long plate girder must support a uniformly distributed load and concentrated loads at the one-third points. The uniform load consists of a 1.3-kipyft dead load and a 2.3 kip/ft live load. Each concentrated load consists of a 28-kip dead load and a 49-kip live load. There is lateral support at the ends and at the one-third points. Use A572 Grade 50 steel, a total depth of 80 inches, and LRFD. a. Select the girder cross section and the required spacing of intermediate stiffeners. b. Determine the size of intermediate and bearing stiffeners. c. Design all welds
- A welded plate girder of 18 m span having flange plates 400x16 mm for each flange and 200x10 mm web. Compute the sectional properties and moment of resistance of the plate girder . Design also the end bearing and intermediate transverse stiffener, if the girder is subjected to U.D.L. of 120 kN/ml, For the beam in F!gure , (n) Druw the ineluence lines for RA, MB, and Re (b) Assumlng that the Span Can be loaded with a is Kips/ft uni form load of varilBable length and the concentrated load of detall) 20 ok'ps, determine the maximum posielco Value of MB cplease wr!te Hinge(M-0) 8t 8ft 8ftA plate girder cross section consists of two flanges, 11⁄2 inchesx 15 inches, and a 5⁄16-inch 3 66-inch web. A572 Grade 50 steel is used. The span length is 55 feet, the service live load is 2.0 kips/ft, and the dead load is 0.225 kips/ft, including the weight of the girder. Bearing stiffeners are placed at the ends, and intermediate stiffeners are placed at 69-20 and 12,-9,, from each end. Does this girder have enough shear strength? a. Use LRFD. b. Use ASD
- Draw BMD and SFD for the beam shown below: 8 kN w 2 kN/m A 3 m B. 9 m 3 m Rp D.a) Write and explain one advantage and onedisadvantage of using intermediate stiffeners in plate girders. b) If a plate girder design was initially determined to require intermediate stiffeners, but one optedtonot use them, how else could the plate girder be designed to achieve the same shaer capacity. c) A w-shepe beam is bent in bi-axial bending. All loading passes through its shear center. Please explain why the flexural strenght about its weak axis is the fullplastic moment capacity regardless of LbCantilever beam is rectrangular in section having (80 mm width) and (120 mm depth). If the cantilever is subjected to a point load of (6 kN) at the free end and the bending stress is not to exceed (40 MPa), find the span of the cantilever *.beam 6 kN 120 mm 80 mm- 1.48 m 1.28 m 2.56 m O 2.10 m O
- Q4. Considering BOTH strength and deflection criteria in approximate truss design, what would be the maximum distributed load, w, that the below truss can carry? d is the distance between the top and bottom boom. Given: alloeable - 200 MPa - Span 350 W 20kN 15m Sallowable E = 200 GPa d= 1.5m Cross-section area of tensile or compressive boom (not together) A= 2500mmPp-35 k PL 80 k 18 ft 8 ft A simply supported beam (AB) of 18 ft with an overhang (BC) of another 8 ft is loaded at the free end C with a concentrated service dead load of 35 k and a service live load of 80 k. The beam is laterally supported at both supports (at A and B) and there is no bracing at the free end (at C) of the cantilever. Neglect the weight of the beam, select the lightest W section of A 992 steel for this beam (ABC) that can safely carry the applied loads theANSWER THE PROBLEM AND SUBMIT IT ON OR BEFORE 8:50 AM 20.JPG 2A rectangular beam has a clear span of 7.5m and carries a service live load of 75KN/m and a dead load of 45K/m including its own weight. The beam has a width of depth of 500mm. It is reinforced with 4 – 32mm rebar in two rows. Total depth of the beam is 600mm with F'c = 32MPA, Fy = 414MPA, Fyt = 276MPA. Use normal weight concrete. a Using Detailed calculation method for shear strength for concrete, determine the spacing of 10mm vertical U-stirrups at critical section. 300mm and an effective %3D