Question

Problem 1 Reinforced Concrete T-Flanged Sections (50 pts.) You are required to analyze and design the propped cantilever t-section from HM 4 but for shear only. Draw shear V and moment M diagrams for uniformly distributed load throughout the 30ft span and equally concentrated loads at 10ft and 30ft. Recall that the connection at the left joint N1 is fixed. The connection at 20ft N3 is a roller. The right end node N2 is a free end. Use a concrete compressive strength fc-4ksi and a steel yield stress fy- 60ksi. Use normal weight concrete NWC with a density of 150pcf. Figure 1.2 shows a 3D view of the T-beam section. The uniform unfactored design loads are DL = 1.5k/ft and LL = 2.5k/ft. The concentrated load is Pdead 1.5k and Plive-2.5k. Include the weight of the section in the analysis. Use a factored load combination U = 1.2DL+1.6LL. Determine the required reinforcement in shear. Do not change the spacing more than four times. The beam stem is 12 inches, the slab thickness is 6 inches and the flange width is 32 inches. No need to design for bending. Other considerations are required bu t not necessary at this time. Show cross sections and elevations with results. 10 N2 Figure 1.1 RC Beam with Cantilever 2 Figure 1.2 3D View of Reinforced Concrete T-Beam Section

Answer 1

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