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1. Choose an existing and failed bridge and conduct research upon them 2. Sketch and plan DIY bridge 3. Identify and examine weaknesses of DIY bridge 4. Identify calculations required doesn't have to be too detailed ENG 10003 Mechanics of Structures Final Project Semester 2 2021 Version 1.3 July 2021 Assessment Title: Design and Build Your Model Bridge Due Dates: First submission: 20th September 2021 by 11:59pm AEST with peer-review feedback component to be completed no later than the 24th September (7%) Final submission: 7th November by 11:59pm AEST (33%) Total Assessment Weighting: 40% Assessment Type: Individual, with assessable peer review activity for first submission Individual or optional group of 2 for final submission Aims This project aims to further develop your understanding of the key learnings from this unit (and to exercise your brain to churn creative solutions while working from home.) Project Learning Outcomes Students who successfully complete this project should be able to: 1. Identify an existing bridge (online) and explore the forces and/or other actions acting on the bridge and describe how the bridge maintains equilibrium and stability. Consider traffic load/ wind load or any other type of loads that you can identify. Reflect on a previous bridge failure and lessons learnt. 2. Plan and design your own bridge with materials that you can find from home – minimum clear span of 600mm. The bridge must sustain the loads for a minimum of 10 seconds. Minimum width of bridge (80mm). The total weight of your bridge should not exceed 1kg. Challenge yourself to create a bridge that can carry the heaviest load. Be as Creative with the built as you can!). Theme of design: Heaviest load carrying, creative built Your Tasks You have been contracted to design a bridge from materials from home (for example spaghetti, popsicle sticks, marshmallows, straws, toilet paper roll, Lego blocks or anything else that you can think of). First submission report - mandatory Task 1: Background research (for submission in first stage and refined for final submission) 1) Research an existing bridge online. a) Describe the type of bridge, location, materials, span, member sizes, support type b) Identify type of loads acting on the bridge – direction of loads acting on the bridge ENG 10003 Mechanics of Structures Final Project Semester 2 2021 Version 1.3 July 2021 c) Identify tension and compression members, sketch free body diagrams and describe how the bridge maintains its equilibrium d) Identify 3 points of advantages and disadvantages for this type of bridge 2) Research on a bridge that has failed in the past a) Identify what were the causes of failure b) What are the lessons learnt? c) If you were the design engineer, what would you have done differently? Task 2: Plan and design your own bridge (for submission in first stage and refined for final submission) 3) Do a search on Google if you need inspiration for DIY bridge (for e.g. Spaghetti bridge, straw bridge etc.) 4) Plan the design of your bridge a. explain selection of materials, b. identify how to connect pieces together, c. explain why you have chosen the shape of the bridge d. targeted span and loads that it can carry – do some trials if necessary to justify the loads that you think your bridge can carry (Remember, your home-made bridge should have a clear span of 600mm minimum) 5) Explain how are you ensuring stability of the bridge, identify where could the bridge potentially fail, what are the perceived weak points? What are you going to do about it? Final submission report and video - mandatory Task 3: Construct and presentation your own bridge 6) Construct your bridge, document step by step on how you have built your bridge (Remember to take a photo of you and your final bridge) 7) Identify what changes you have made since your first submission and why you have done so. 8) Provide calculations to explain the built of your bridge, to include the following: a. Identify load path – explain how the load from midspan reach the supports b. Calculation of reactions to include point load and self-weight of your bridge c. If DIY bridge is a truss, analyse member forces near support and at mid span via method of joint/section d. Draw bending moment and shear force diagram assuming bridge is a simple beam e. Calculate section properties of the main deck. f. Provide 3 suggestions on how you can improve the section properties to give your bridge better performance g. Calculate stresses in main members -bending stress and transverse shear stress at critical sections 9) Showcase your bridge in a video presentation, explaining how you have built the bridge, video should show clearly the dimensions and weight of the bridge, the perform load test - start with a load of 1kg at midspan (hold it for 10s) and continue increasing the load (see video of how load was added incrementally in this competition). Clearly mention what is the https://www.youtube.com/watch?v=-xvmwa8_fII ENG 10003 Mechanics of Structures Final Project Semester 2 2021 Version 1.3 July 2021 load to weight ratio of your bridge. Reflect on what improvements could be done for your bridge. 10) Write up a report documenting your research, design and performance of your model bridge and thoughts about what you may do differently to improve the bridge. Your report should contain photos explaining the built and load test. More info on First and Final Report Format: • Cover page • Table of contents • Numbered headings and subheadings • Page numbers • Justified paragraphs • Swinburne Harvard Referencing • Numbering of figures and tables and making sure they are cross-referenced throughout the report • Use Calibri 11 font, 1.5 line spacing, 2.5cm margins Please refer to relevant rubrics for marking assessment. RUBRICS ENG10003 Mechanics of Structures Semester 2, 2021 RUBRICS_ENG10003_Mechanics of Structures SEMESTER 2, 2021 | VERSION 1.1. Last updated: July 2021 1 First Submission_DIY Bridge (7% weighting, Individual assessment with peer-review feedback) Criteria Points Attributes Poor (0.0-0.5) Fair (0.5-0.7) Good (0.7-0.8) Excellent (0.8-1.0) Research ULO 1, 2, 3 2.5 Research a bridge of choice online 1. Describe the type of bridge, location, materials, span, member sizes, support type 2. Describe the purpose of the bridge 3. Identify type of loads acting on the bridge, sketch and describe how the bridge maintains its equilibrium (draw free body diagram) 4. Identify tension/compression members 5. Identify possible advantages and disadvantages of this type of bridge Failure of bridge 6. Describe type of bridge, location 7. When did failure occur? How long after operation 8. Why did failure occur? What were the lessons learnt. 9. If you were the engineer responsible for this bridge, what would you have done differently? Please note PLAGIARISM!! Do not cut and paste materials straight from website – write in your own words Missing attributes, most aspects are poorly addressed Most attributes are stated. All attributes are stated and explained clearly. All attributes are addressed excellently and explained clearly. DIY Bridge Plan of Action 1.5 Reminder to address ALL attributes Missing attributes, most aspects are Most attributes are stated. All attributes are stated and All attributes are addressed RUBRICS ENG10003 Mechanics of Structures Semester 2, 2021 RUBRICS_ENG10003_Mechanics of Structures SEMESTER 2, 2021 | VERSION 1.1. Last updated: July 2021 2 ULO 1, 2, 3 Clear descriptions of: 1. type of DIY bridge that you are planning to build 2. sketches of design (provide 2 design – discuss the merits and weaknesses) 3. materials considered & weight of materials (justify choice of materials considered) 4. how is clear span of 600mm achieved? 5. how is minimum width of 80mm achieved? 6. connections (how are you joining the different members together) 7. load capacity that you are aiming for (and why you think the bridge is able to carry this load) Preliminary Analysis of the most likely design you will build: 1. Load path (describe how bridge resist vertical and any accidental horizontal load) 2. Calculation of reactions under self- weight and applied loads 3. Deflected shape under load (explore applying loads in middle and closer to supports) 4. Weak points identified (where do you expect the bridge to fail? What are you going to do to strengthen the bridge?) poorly addressed explained clearly. excellently and explained clearly. Presentation of Report 1 a) Organisation and structure b) Formatting c) Referencing Report is poorly written, with poor paragraph and Some attributes are missing. All attributes are performed. All attributes are performed well. RUBRICS ENG10003 Mechanics of Structures Semester 2, 2021 RUBRICS_ENG10003_Mechanics of Structures SEMESTER 2, 2021 | VERSION 1.1. Last updated: July 2021 3 Clarity of Writing and Presenting ULO 1, 2, 3 d) Grammar and spelling e) Professional presentation f) Includes an Abstract; Table of Contents; List of Figures; List of Tables; Appendices (where relevant) Whole report is well-organized into Introduction, Sections, Sub-sections with enumeration and Table of Contents documenting research of a bridge online and DIY bridge: • Clearly documenting bridge span, size and type of loads carried. • Calibri – font size 1,1 min 1.5 line spacing, page number and margin • Enumeration of equations, Figures, and Tables • Cross referencing of Figures, Tables and equations in text. • Grammar and spelling • Cited reference to all borrowed materials using Swinburne Harvard Referencing style Consistency throughout report Estimated 6-8 pages for report excluding front cover and table of contents sentence structure. Report is difficult to follow. Few links within or between sections or paragraphs. Formatting is poor and/or inconsistent. Report contains many errors in grammar and spelling. Fails to include Abstract, Table of Contents, List of Figures, OR List of Tables Missing cross referencing of most Figures, Tables and equations in text. Citations and the reference list exhibit many deviations from the Harvard referencing The report has an adequate layout, Writing is basic but able to be followed. Some errors in grammar and spelling. Cross referencing of most Figures, Tables and equations in text. Citations and the reference list are generally compliant with the Harvard referencing style. The report has a professional layout. Writing is clear and easy to follow. Few errors in grammar and spelling. Cross referencing of all Figures, Tables and equations and well integrated in text. Citations and the reference list are mostly compliant with the Harvard referencing style. The report is an exemplar of a professional layout. The writing is very clear and engaging to read. No errors in grammar and spelling. Cross referencing of all Figures, Tables and equations and expertly integrated in text. Citations and the reference list are fully compliant with the Harvard referencing style. Peer review ULO 1, 2, 3 2 Peer review using TEMPLATE provided The feedback was written in a supportive tone that highlighted the positives and suggested refinements for things that need to be improved on Missing attributes Most attributes are stated. All attributes are stated and explained clearly. All attributes are addressed excellently and explained clearly. Submitted peer https://www.swinburne.edu.au/library/search/referencing-guides/harvard-style-guide/ https://www.swinburne.edu.au/library/search/referencing-guides/harvard-style-guide/ RUBRICS ENG10003 Mechanics of Structures Semester 2, 2021 RUBRICS_ENG10003_Mechanics of Structures SEMESTER 2, 2021 | VERSION 1.1. Last updated: July 2021 4 Typed comments were provided that will assist the person receiving the feedback in refining his/her final project submission. What suggestions do you have for improving the proposed DIY bridge of your peers? What other reflections would you suggest for the research bridge? Submission in the required 2 places: 1) under “Submit your peer review” 2) to your colleague under “First Stage Submission” review in 2 places as required. Provide succinct examples and feedback to help colleague reflect and refine submission Note: The “Attributes” in Column 3 refers to different components of the “Criteria” in Column 1. Project Briefing “Build-It-Yourself” Bridge Project Stage 1: Research and Peer Review Stage 2 : Final report and video ENG10003 Engineering Mechanics We respectfully acknowledge the Wurundjeri People of the Kulin Nation, who are the Traditional Owners of the land on which Swinburne’s Australian campuses are located in Melbourne’s east and outer-east, and pay our respect to their Elders past, present and emerging. We are honoured to recognise our connection to Wurundjeri Country, history, culture, and spirituality through these locations, and strive to ensure that we operate in a manner that respects and honours the Elders and Ancestors of these lands. We also respectfully acknowledge Swinburne’s Aboriginal and Torres Strait Islander staff, students, alumni, partners and visitors. We also acknowledge and respect the Traditional Owners of lands across Australia, their Elders, Ancestors, cultures, and heritage, and recognise the continuing sovereignties of all Aboriginal and Torres Strait Islander Nations. Acknowledgement of Country Task 1: Research on bridges 1) An existing functioning bridge • Type of bridge, location, materials… • Types of loads on the bridge • Pros & Cons • Others… 2) A bridge that has failed • What happened? • WHY? • Lessons learnt…. TASK 1: Research on bridges https://www.slideshare.net/dheerendraMTECH/suspension- bridges-47320545 TASK 1: Research on bridges https://www.slideshare.net/dheerendraMTECH/suspension-bridges-47320545 Failures of bridges – where, when, WHY? • Design? • Accidental overload? • Construction? • Maintenance? Reflections on lessons learnt TASK 1: Research on bridges Failures of bridges – where, when, WHY? TASK 1: Research on bridges Pedestrian Bridge Collapsed in 2018 Caused 6 DEATHS Source: New Civil Engineer Failures of bridges – where, when, WHY? TASK 1: Research on bridges Task 2: Plan and design your own bridge • Min clear span – 600mm • Max bridge weight – 1kg • Min width of bridge – 80mm • Your aim: MAXIMUM load carrying capacity! • Choice of materials • Connections • Strength and stability Task 2: Plan and design your own bridge Task 3: Build-Your-Own Bridge Task 3: Build-Your-Own Bridge Task 3: Build-Your-Own Bridge Google….. for inspiration Getting Started….. Task for this week (Week 2) • Be familiar with the Project Brief posted in Modules • Start your research on existing bridge, and examples of failures • Start planning your DIY bridge – see examples from Google, checkout Spaghetti Bridge Competition and Lego Masters Bridge • Be familiar with the requirements of the Rubric • Assignment 2 due on Sunday • Study Group commences next Friday (week 3) – please enrol from CANVAS if you haven’t done so