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16-Civ-B2 Advanced Structural Design: May 2013

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Continuous welded plate girder (12 + 6 + 2 marks)
  2. Question 2 Plastic design of the rigid frame and its footing (12 + 8 marks)
  3. Question 3 Welded corner connection and the beam-column AB (14 + 6 marks)
  4. Question 4 Composite floor beam for a warehouse (15 + 5 marks)
  5. Question 5 Reinforced concrete design of member BC (14 + 6 marks)
  6. Question 6 Beam-column CD and the rigid connection at B (14 + 6 marks)
  7. Question 7 Post-tensioned prestressed concrete girder (12 + 6 + 2 marks)

Start with Question 1 →

Paper format. National Exams, May 2013, 98-Civ-B2 Advanced Structural Design; 3 hours, closed book (handbooks and textbooks permitted); seven design questions, any five of which constitute a complete paper, all of equal value (20 marks each). All seven are worked below, because the set is a study resource rather than a timed sitting. Design data given on page 1 and used throughout: concrete $f^{\prime}_{c}=30\ \text{MPa}$, structural steel $F_{y}=350\ \text{MPa}$, reinforcing bar $f_{y}=400\ \text{MPa}$; for the prestressed girder $f^{\prime}_{ci}=35\ \text{MPa}$, $f^{\prime}_{c}=50\ \text{MPa}$, $n=6$, $f_{pu}=1750\ \text{MPa}$, $f_{py}=1450\ \text{MPa}$, $f_{pi}=1200\ \text{MPa}$ and losses of 240 MPa. All loads shown on the figures are unfactored.

Reference texts. CSA S16, Design of Steel Structures; CISC, Handbook of Steel Construction; Kulak & Grondin, Limit States Design in Structural Steel; CSA A23.3, Design of Concrete Structures; MacGregor & Bartlett, Reinforced Concrete: Mechanics and Design (Canadian edition); Collins & Mitchell, Prestressed Concrete Structures; Beedle, Plastic Design of Steel Frames; National Building Code of Canada.

Check — load factor. The paper states that the loads shown are unfactored but does not separate dead from live. Every design below therefore applies a single load factor of 1.5 to the given loads, which is the NBCC live-load factor and is the conservative reading when the split is unknown. Self weight, where it is generated by a member being sized here (the reinforced concrete frame of Questions 5 and 6, and the prestressed girder of Question 7), is carried separately at 1.25. If the examiner intended a different split, only the magnitudes change — every mechanism, section classification and interaction equation is unaffected.