1. EAS 140 Engineering Solutions
Lecture #9
Civil Engineering Case Study

2. Announcements Reading for Civil Eng. Case Study:
Jensen, section 4.5 and Chapters 5, 6, and 7
Reading for Lab 4:
Laboratory Guide, Chapter on Charting
Midterm:
Friday, October 22nd, 6-8 pm
Chemical Eng. Case study - due at Lecture 10

3. Civil Engineering In the good old days, everyone was civil
Oldest engineering discipline
In the good old days, everyone was civil
American Society of Civil Engineers (ASCE) – 1852
Most diverse engineering discipline
Tall buildings to highways to drinking water treatment
Common threads:
mechanics – solid or fluid
engineered and natural systems
mathematics

4. Civil Engineering Disciplines
Structural engineering
Geotechnical engineering
Construction management
Environmental engineering

5. Structural Engineering
Creative use of: F = ma
Intelligent approaches to uncertainty
Engineering is the art of modelling materials we do not wholly understand, into shapes we cannot precisely analyse so as to withstand forces we cannot properly assess, in such a way that the public has no reason to suspect the extent of our ignorance. AR Dykes (1976)

6. Geotechnical Engineering
Where structures touch the dirt
Areas:
soil mechanics
foundation engineering
engineering geology
rock mechanics and rock engineering

7. Construction Management
Management of materials, money, and people
Areas:
scheduling
decision-making
Web-based inspections

8. Environmental Engineering
Analysis and design of natural and engineered systems
Areas:
drinking water treatment
wastewater treatment
environmental modeling
water resources

9. Example: Earthquakes Structural engineers Geotechnical engineering
design and implement passive/active control
Geotechnical engineering
soil liquification
Construction management
reconstruction with limited resources
Environmental engineering
lifelines – water, sewer

10. Civil Eng. Case Study
Topic: Collapse of suspended walkways in the Kansas City Hyatt Regency hotel 10

11. Civil Eng. Case Study
After the collapse: 10

12. Civil Eng. Case Study deck rod box beam stringer Anatomy of a Walkway:12

13. Civil Eng. Case Study
Nut/washer pulled through box beam: 13

14. Civil Eng. Case Study Case Study Question:
Was the fourth-floor walkway designed properly?
How did the capacity compare to the code?
How did the capacity compare to the load? 13

15. Civil Eng. Case Study Case Study Questions:
How did the change order affect the load on the weld? 13