Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. 98-Civ-B2 Advanced Structural Design, National Exams May 2015 — 3 hours, closed book (textbooks and design handbooks permitted, no notes). Seven design questions of 20 marks each; any five constitute a complete paper, so all seven are solved here. All loads shown on the figures are unfactored. Page 1 supplies the design data used throughout: concrete f′c = 30 MPa, structural steel Fy = 350 MPa, reinforcing steel fy = 400 MPa; for the prestressed member f′ci = 35 MPa, f′c = 50 MPa, n = 6, fpu = 1750 MPa, fpy = 1450 MPa, initial stress 1200 MPa and total losses 240 MPa.
Reference texts. CSA S16:19 Design of Steel Structures; CISC Handbook of Steel Construction, 12th ed.; CSA A23.3:19 Design of Concrete Structures; CSA S6:19 Canadian Highway Bridge Design Code; NBCC 2020 Part 4; Hibbeler, Structural Analysis, 10th ed. (plastic analysis, Ch. 18).
Check — load factors. Page 1 states only that “all loads shown are unfactored” and gives no dead/live split. Throughout this paper the applied loads on the figures are factored by 1.5, and any self weight introduced by the solution itself (the plate girder, the deck, the prestressed beam, the reinforced-concrete frame) by 1.25, consistent with NBCC 2020 Table 4.1.3.2. The mechanisms, section classifications and interaction equations are independent of that choice — only the magnitudes change.
