see pdf for questions and instructions,
Microsoft Word - 2022 SP6 UO Structures 1 Test Master.docx Page 1 ASSESSMENT DESCRIPTION In this test, apply the relevant concepts covered in this course. In the first question, design different members of a truss, and in the second question determine loads, bending moments, shear forces and deflections in a building structure. Where relevant, reference the relevant Australian Standard Loading Codes AS1170 and ASI Design Capacity Tables for Structural Steel. Resources from weeks 1 ‐ 10 will be a valuable reference. Notes: 1. Test Conditions apply and there is to be no discussion with anyone else and no questions asked of teaching staff for the duration of the test. Late submissions will not be accepted. 2. The Grade and Feedback for Assessment 1 Part B will be returned after both the Test (Assessment 2) has been submitted and the Test deadline has elapsed. o All Calculations must be typed, preferably using the Word Equation Editor. Handwritten calculations will not be assessed. 2022 SP6 UO Structures 1 – Assessment 2 Page 2 UO Structures 1 Test Instructions Read this page in detail The Test is out of 100 marks and is worth 35% of overall course grade Answer All Questions All Calculations must be typed, preferably using the Word Equation Editor. Handwritten calculations will not be assessed. * Preferably, type the calculations using equation editor in MS Word. *Excel spreadsheets and software analysis tools will not be accepted for Meltzersubmission Word document submission only o Excel spreadsheets and software analysis tools will not be accepted for submission Where relevant, diagrams must be included with calculations (e.g. Free body diagrams, tributary areas) and these can be hand drawn and scanned in. o Clear and informative diagrams can help the assessor follow your calculations and reasoning. For full marks for any part of a question, working must be displayed and units must be correct at every step of working. o For example, in Question 1 Part A the correct support reactions with no working or free body diagram(s) to show how the support reactions were obtained, will only score 1 out of 10 for that part. The marks for each part are underlined in bold font Answers are to be correct to 2 decimal place. o For example, an answer of “The force in member YZ is 125.367 kN (Compression)” can be written as The force in member YZ is 125.37 kN (Compression) o For example, an answer of “The force in member YZ is 300.00 kN (Compression)” can be written as The force in member YZ is 300 kN (Compression) The Design Properties and Capacity Tables can be found in the Assessment 2 Section on the Course website. You will need to access the Australian Standards, especially AS/NZS 1170.1:2002 via Techstreet at the UniSA Library. 2022 SP6 UO Structures 1 – Assessment 2 Page 3 QUESTION 1 Use Figure 1, a pin jointed steel truss with bolted connections and the values presented in Tables 1 and 2, as well as your mathematical thinking and reasoning to respond to the following questions. a) Ignoring the self‐weight of the members, determine the support reactions. 10 marks b) Ignoring the self‐weight of the members, determine the force in the four members AB, AD, CD and AC. 15 marks c) Design members AB, AC and BC. Use Equal Angle (EA) Sections for members in Tension and assume the member is bolted with 1 Hole in Leg. Use Square Hollow Sections (SHS) for members in Compression. For zero‐force members use SHS 65x65x1.6. 12 marks d) Determine the stress, strain and elongation/shortening of member AB (Assume Esteel = 200,000 MPa) 8 marks e) Design the bolts for the connections on members AB, AC and BC. Use the same “Grade:8.8” bolt size for all connections. That is, whatever bolt size is selected on one member, needs to be used on the other three members. 9 marks f) The steel price is $14 per kg, and the bolt price is provided in Table 2. Determine the total cost of the material to build members AB, AC and BC. 6 marks Remember to include free body diagrams at part (a) and part (b) and your answers must be consistent with the orientation of the truss presented in Figure 1. 2022 SP6 UO Structures 1 – Assessment 2 Page 4 Table 1: Parameters for Question 1 P1 P2 P3 ? ? L1 L2 L3 200kN 160kN 310kN 60° 30° 4.4m 4.6m 4.5m Figure 1: Steel Truss with bolted connection Remember to include free body diagrams at part (a) and part (b) and your answers must be consistent with the orientation of the truss presented in Figure 1. The x‐axis is the horizontal axis. The y‐axis is the vertical axis. 2022 SP6 UO Structures 1 – Assessment 2 Page 5 Table 2: Cost per bolt Cost per Bolt Bolt Size Grade: 4.6 Grade: 8.8 M12 $9 M16 $11 $20 M20 $15 $24 M24 $17 $26 M30 $21 $28 M36 $23 2022 SP6 UO Structures 1 – Assessment 2 Page 6 QUESTION 2 A simple 3 storey building is to be constructed in Adelaide. Use the details provided in Figure 2, Figure 3, and Table 3 to respond to the following questions. a. Calculate the dead load and live load per area of the floor. The floor dead load consists of the floor weight plus a superimposed dead load for the wall partitions. 7 marks b. In the second floor beams, determine the maximum moment and maximum shear for beams A4‐B4 and B4‐C4 due to live load only. Also, in no more than 50 words, compare and discuss the maximum moment and shear of the two beams. 10 marks c. Calculate the deflection of beams A4‐B4 and B4‐C4 in the Second floor due to the dead load only if a cross section of 460 UB 74.6 is used. Also, in no more than 50 words, compare and discuss the deflection of the two beams. 6 marks d. In no more than 100 words, explain why I‐shaped sections are usually used for beam members and also explain which part of an I‐shaped section resists shear and which part resists moment. 5 marks e. Column i. Determine the force in columns A2 and B2 at the First Floor and Second Floor, due to dead load only 6 marks ii. In no more than 50 words, Compare and discuss the loads of the edge (A2) and internal (B2) column. Also, in no more than 50 words, compare and discuss the loads of these columns in the Second and First floor. 6 marks Your calculations are to be based on the following design assumptions: Ignore the weight of the beams and columns. Beams are simply supported at their ends The building has N levels o First Floor o Second Floor o … o Nth Floor The loads on all floors including the roof (which is the ceiling of the Nth Floor) are the same The slab design is a One‐way slab in the Y‐axis direction Assume Esteel = 200,000 MPa If required, make further design assumptions and justify with suitable explanations. 2022 SP6 UO Structures 1 – Assessment 2 Page 7 Table 3: Parameters you will use for Question 2 Number of floors (N) Building function Dead load due to partitions (kPa) L1 (m) L2 (m) L3 (m) L4 (m) L5 (m) Storey height (m) 3 Museum 1.8kPa 5.7m 4.5m 5.9m 3.6m 2.7m 4.4m Floor Details (See Figure 2) Floor surface Sand Concrete Slab Ceiling Clay tiling Sand Reinforcement ratio= 3% Portland cement plaster Thickness 14mm 45mm 160mm 22mm Ceiling Floor surface Sand Concrete Figure 2: Floor Detailing 2022 SP6 UO Structures 1 – Assessment 2 Page 8 A B C 1 2 3 4 L 3 L 4 L 5 L2 L1Y X Figure 3: Typical Floor Layout Plan