EAS 140 Engineering Solutions

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EAS 140Engineering Solutions

• Lecture 9
• Civil Engineering Case Study

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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

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Civil Engineering

• 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

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Civil Engineering Disciplines

• Structural engineering
• Geotechnical engineering
• Construction management
• Environmental engineering

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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)

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Geotechnical Engineering

• Where structures touch the dirt
• Areas
• soil mechanics
• foundation engineering
• engineering geology
• rock mechanics and rock engineering

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Construction Management

• Management of materials, money, and people
• Areas
• scheduling
• decision-making
• Web-based inspections

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Environmental Engineering

• Analysis and design of natural and engineered
  systems
• Areas
• drinking water treatment
• wastewater treatment
• environmental modeling
• water resources

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Example Earthquakes

• Structural engineers
• design and implement passive/active control
• Geotechnical engineering
• soil liquification
• Construction management
• reconstruction with limited resources
• Environmental engineering
• lifelines water, sewer

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Civil Eng. Case Study

• Topic Collapse of suspended walkways in the
  Kansas City Hyatt Regency hotel

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Civil Eng. Case Study

• After the collapse

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Civil Eng. Case Study

• Anatomy of a Walkway

deck
rod
box beam
stringer
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Civil Eng. Case Study

• Nut/washer pulled through box beam

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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?

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Civil Eng. Case Study

• Case Study Questions
• How did the change order affect the load on the
  weld?