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Text Information. Manual of Steel Construction - $95 Make check to AISC Notes for CE482 by Dr. Hans Gesund - $10 Cash or check to University of Kentucky Both will be distributed today. Payment is due by next Wednesday, June 29 th. CE482 Elementary Structural Design. Summer 2004

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  1. Text Information Manual of Steel Construction - $95 Make check to AISC Notes for CE482 by Dr. Hans Gesund - $10 Cash or check to University of Kentucky Both will be distributed today. Payment is due by next Wednesday, June 29th.

  2. CE482Elementary Structural Design Summer 2004 TWR 3:00 – 5:30 EST June 22 – August 4

  3. CE 482 – Elementary Structural Design (Summer 2004) INSTRUCTOR: Christine F. Goble, Ph.D. 261 RGAN (859)257-6336 x80652 goble@engr.uky.edu OFFICE HOURS: TWR 1:00 – 2:30 EST ASSISTANT: Balu Datchanamourty 372 OHR; (859)257-3034 d_balsu@yahoo.com

  4. Syllabus Continued REQUIRED TEXT Notes for CE482 Elementary Structural Designby Dr. Hans H. Gesund Manual of Steel Construction, Load and Resistance Factor Design, 3rd ed. American Institute of Steel Construction, Inc., 2001. COURSE DESCRIPTION Application of principles of solid mechanics to the design of steel, timber, and reinforced concrete members and structures. Emphasis is on basic ideas and their application to practical design of relatively simple structures according to the building codes.

  5. Syllabus Continued GRADING POLICY Final averages will be computed as follows: Homework 24 % Midterm 38 % Final Exam 38 % • Lower cut-offs for letter grades A, B, C, D will be 90, 80, 70, 60 respectively. However a slight upward adjustment of the grades may be made if, in the instructor’s opinion, the grades are too low. • Homework assignments will be made throughout the semester. All homework must be submitted at the start of class on the assigned date. Late papers will not be accepted except in the case of extreme illness or officially sanctioned absence from campus. • A grade of zero will be given for all unexcused absences from exams. Make-ups will be given only in cases of extreme illness or officially sanctioned absence from campus. Requests for make-up exams must be made before the scheduled test if possible.

  6. Syllabus Continued ENGINEERING ETHICS It will be assumed that each student subscribes to a professional code of ethics that is the basis for their behavior in class. Any and every case where these ethics are violated will be dealt with according to the provisions in the Student Code. The minimum penalty specified by the Student Code for cheating is an E in the course.

  7. COURSE OUTLINE ClassDateTopicsReading (notes) STEEL 1 June 22 Loads, LRFD Manual, Tension member design 1-12 2 June 23 Tension member design 3 June 28 Tension member connections 12-23 4 June 29 Flexural design 25-36 5 June 30 Flexural design, Composite members 36-43 6 July 5 Biaxial bending, Cover plates 45-50 7 July 6 Columns, Combined bending and axial 61-68 TIMBER 8 July 7 Midterm review, Timber 1-11 • July 12 Midterm Exam • July 13 Timber

  8. COURSE OUTLINE ClassDateTopicsReading (notes) CONCRETE 11 July 14 Intro, Short columns 3-13 12 July 19 Flexural members 14-25 13 July 20 Flexural members 14 July 21 Flexural members – shear 26-30 15 July 26 Flexural members – Torsion 43-46 16 July 27 Anchorage and development length 31-39 17 July 28 Pan Joists, Columns w/ Bending 39-43, 56-61 18 Aug. 2 Review 19 Aug. 3 No Class • Aug. 4 Final Exam Midterm Exam: Tuesday, July 12, 3:00 – 5:00 Final Exam: Thursday, August 4, 3:00 – 5:00 Schedule subject to change as semester progresses

  9. We will spend the first few weeks on steel design. • You will need to bring your Manual of Steel Construction and Lectures on Steel Design (first section of notes) to class each night. • WARNING: EACH CLASS MEETING IS EQUIVALENT TO ABOUT ONE WEEK DURING THE REGULAR SEMESTER.

  10. Introduction Before we can discuss each material, we must know what loads we are designing for and how to compare those loads to the strength of the material. Before we begin steel design we will discuss: • Loads • Design Philosophies

  11. LOADS All loads fall into two main categories: • Dead Loads • Live Loads

  12. Dead Loads • Fixed position, gravity service loads (permanent) • Structural members • Plumbing • HVAC • Floor coverings • Suspended ceilings • Etc.

  13. Live Loads • Gravity loads acting when the structure is in service, but varying in magnitude and location. • Human occupants • Furniture • Stored goods • Vehicles • Environmental Loads

  14. Environmental Loads • Live loads but usually treated separately. They include: • Snow • Ice • Wind • Etc.

  15. Building Code Live Loads • Live loads are usually specified in Building Codes • We will reference the Kentucky Building Code (see the appendix to the steel section of the class notes) • A reduction to the live load is provided based on the probability that the entire building will not be subjected to the full combination of loads at one time.

  16. Live Load Reduction Factor L = Lo (0.25 +15/√Ai), Ai in square feet L = Lo (0.25 +4.57/√Ai), Ai in square meters

  17. Influence Area, Ai • Tributary area times 2 for beams • Tributary area time 4 for columns • Tributary area is the loaded area attributed to a member.

  18. Calculating Tributary and Influence Areas • modified from p. 2 notes – partial floor plan 1 10 ft beams 2 10 ft 3 10 ft 4 30 ft supporting girders

  19. Example: Office Building Floor PlanDetermine live loads on Beams B4 and B5, Girders G1 and G2, and Column B2figure from p. A-11 notes

  20. Design Philosophies LRFD – Load and Resistance Factor Design γi = Load Factors Qi = Load Effect Ф = Resistance Factor Rn = Nominal Strength or Resistance

  21. Design Philosophies ASD – Allowable Stress Design Qi = Load Effect Rn = Nominal Strength or Resistance F.S. = Factor of Safety

  22. Typical Steel Stress-Strain Curve

  23. Manual of Steel ConstructionLRFD • Part 16 (Thumbnail ‘SPEC’) –Specification and Codes There are four different Specification listed on page 16-1. We will examine only the first, ‘LRFD Specification for Structural Steel Buildings’.

  24. LRFD Specification for Structural Steel Buildings Table of Contents – p. 16.1-v • The specification is divided into lettered chapters • The chapters are followed by the Appendix then the Commentary • The Appendix and Commentary are lettered to correspond to the main specification chapters

  25. LRFD Specification for Structural Steel Buildings • Pages with Gray edges are not officially part of the Specification • p. 16.1-xv Symbol List • p. 16.1 xxiii Glossary • Written like a legal document • Remainder of LRFD book is support information to aid in designing according to the specification

  26. Remainder of LRFD • Part 1 – Dimensions and Properties • Part 2 – General Design Conditions • Part 3 – Tension Members • Part 4 – Compression Members • Part 5 – Flexural Members • Part 6 – Combined Loading • Part 7 – Bolts …. • Part 17 – Misc. • Index

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