Answer Happy

Use the following values if not indicated on the problem;Qa=0.9, Qs=0.85, Fy=345 MPa (50ksi), Fu=450 MPa(65ksi). A 25-meter pedestrian bridge is supported bytwo steel I-beams longitudinally at each edge. The beam supports aconcrete deck that is 2m wide and 200 mm thick. The deck supports14 people per meter length of the bridge. The mass of each personis 75kg. The unit mass of concrete is 2400 kg/m3 .(a) Calculate the combined load (1.2D+1.6L) per unit length of thebridge if each beam is a W200x71. (Answer in kN/m)(b) Determine minimum required depth of the I shaped steel beambased on shear strength only. Assume the unit weight of the beam is71 kg/m. Use LRFD (Answer in mm)(c) Calculate the design flexural strength of the beam (W200x71).Use J=815800 mm4 and Cw=2.5x1011 mm6 if necessary (Answer inkN-m)
Use the following values if not indicated on the problem; Qa=0.9, Qs=0.85, Fy=345 MPa (50ksi), Fu=450 MPa (65ksi) PROBLEM 1 (35 pts) A 25-meter pedestrian bridge is supported by two steel I-beams longitudinally at each edge. The beam supports a concrete deck that is 2m wide and 200 mm thick. The deck supports 14 people per meter length of the bridge. The mass of each person is 75kg. The unit mass of concrete is 2400 kg/m³. (a) Calculate the combined load (1.2D+1.6L) per unit length of the bridge if each beam is a W200x71. (Answer in kN/m) (b) Determine minimum required depth of the I shaped steel beam based on shear strength only. Assume the unit weight of the beam is 71 kg/m. Use LRFD (Answer in mm) (c) Calculate the design flexural strength of the beam (W200x71). Use J=815800 mm4 and Cw=2.5x10¹¹ mm if necessary (Answer in kN-m)