1. College of Engineering Discovery with Purpose www.engineering.iastate.edu Department of Civil, Construction and Environmental Engineering Tim Ellis, Associate Professor ENGR 101, Section 8 August 26, 2008

2. College of Engineering Discovery with Purpose www.engineering.iastate.edu

3. College of Engineering Discovery with Purpose www.engineering.iastate.edu Agenda  Describe civil engineering.  Apply civil engineering concepts.  Have fun!

4. College of Engineering Discovery with Purpose www.engineering.iastate.edu

5. College of Engineering Discovery with Purpose www.engineering.iastate.edu Design-build Trend Analysis Cost & Scheduling Claim Analysis IT-based decisions Construction Intelligent Compaction Concrete materials Asphalt Pavement Engineering Geo-construction Geo/Materials Water Pollution Control Useful Byproducts Recovery Bio-fuels/energy (CH 4, H 2 ) Fate/Transport of Pollutants Hydrology and Mixing Environmental Bridge Engineering Seismic design/analysis Wind Engineering Precast/Masonry Soil-Structure Interaction Structural Traffic Safety Geographic Infor. Systems Sustainable Transportation Weather Policy and Planning Transportation

6. College of Engineering Discovery with Purpose www.engineering.iastate.edu Structural

7. College of Engineering Discovery with Purpose www.engineering.iastate.edu Structural

8. College of Engineering Discovery with Purpose www.engineering.iastate.edu Geotechnical

9. College of Engineering Discovery with Purpose www.engineering.iastate.edu Transportation

10. College of Engineering Discovery with Purpose www.engineering.iastate.edu Environmental

11. College of Engineering Discovery with Purpose www.engineering.iastate.edu Water Resources

12. College of Engineering Discovery with Purpose www.engineering.iastate.edu Construction

13. College of Engineering Discovery with Purpose www.engineering.iastate.edu Surveying

14. College of Engineering Discovery with Purpose www.engineering.iastate.edu Materials

15. College of Engineering Discovery with Purpose www.engineering.iastate.edu CE Profession – a small sample of challenges you could address for society: Water Quality : Over 2 million deaths in the world each year from water- borne diseases Transportation: In US, over 40,000 fatalities highways each year Foundations and structural failures: thousands have died in earthquakes due to inadequate materials, designs, and construction procedures

16. College of Engineering Discovery with Purpose www.engineering.iastate.edu Are you eager to be a Civil Engineer? Let’s design a bridge….

17. College of Engineering Discovery with Purpose www.engineering.iastate.edu

18. College of Engineering Discovery with Purpose www.engineering.iastate.edu Before we proceed - check the strength of materials in tension and compression In Teams:  1)Partner 1 grasp the flat sheet on the long end with thumb and index finger. Partner 2, do the same at other end of sheet. PULL with a steady force - is the flat sheet good in “Tension” ? 2) Reverse the direction of force, each person push (compress) the paper with equal force. What happened? 3) Use any additional equipment on your desk to improve the strength of the paper in compression.

19. College of Engineering Discovery with Purpose www.engineering.iastate.edu Consider other features affecting strength and stability  Shape  Slenderness  Stiffness

20. College of Engineering Discovery with Purpose www.engineering.iastate.edu

21. College of Engineering Discovery with Purpose www.engineering.iastate.edu Pratt Truss Warren Truss Howe Truss

22. College of Engineering Discovery with Purpose www.engineering.iastate.edu West Point Designer Software allows you to design a truss bridge.

23. College of Engineering Discovery with Purpose www.engineering.iastate.edu You can design your bridge selecting a joint/member combination.

24. College of Engineering Discovery with Purpose www.engineering.iastate.edu The GOAL??? Structurally adequate…. and…economical. $$$$

25. College of Engineering Discovery with Purpose www.engineering.iastate.edu

26. College of Engineering Discovery with Purpose www.engineering.iastate.edu  Bridge approach and abutments  Structural elements Material shape - flat iron or tubes Material type - carbon steel or high strength Material size - length and “width”  Connections

27. College of Engineering Discovery with Purpose www.engineering.iastate.edu

28. College of Engineering Discovery with Purpose www.engineering.iastate.edu COLOR SCHEME  TENSION members turn BLUE  COMPRESSION MEMBERS turn RED   The intensity of the color is directly proportional to the intensity of the loading

29. College of Engineering Discovery with Purpose www.engineering.iastate.edu UNLIKE MYTH BUSTERS! YOU CAN TRY THIS AT HOME http://bridgecontest.usma.edu/