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QUESTION 1 (16%) For each of the concrete members shown in Figure 1 below, sketch a feasible strut and tie model indicating the position and...

Strut and tie modeling to AS 3600 and Continuous Beam Design to AS 3600
QUESTION 1 (16%) For each of the concrete members shown in Figure 1 below, sketch a feasible strut and tie model indicating the position and orientation of the compression struts and tension ties. Beam with single ledge support Beam with double ledge support Irregular deep beam Deep beam Irregular deep beam Beam-column joint under closing bending moment w*
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Irregular deep beam Beam with stepped double ledge support Figure 1 QUESTION 2 (18%) A deep reinforced concrete member carries two members with factored loads as shown in Figure 2. Material properties: f sy = 400 MPa, f’ c = 50 MPa. a) Sketch a feasible strut and tie model indicating the position and orientation of the compression struts and tension ties and calculate the forces in the struts and ties. b) Check the bearing stresses at where the loads are applied. c) What is the minimum width required for the most heavily loaded compression strut. d) Calculate the minimum width required for support b s . Take: u = 0.12 h; w = b s sin θ + u cos θ ; f b1 = 0.85 α f’ c , where α = either 1.0 or 0.8 1800 mm 1800 mm Figure 2
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