Drexel University Department of Civil, Architectural and Environmental Engineering 21 February 2006 Introduction to Civil/Structural Introduction to Civil/Structural Engineering Engineering Franklin Moon, Ph.D. Franklin Moon, Ph.D. Assistant Professor Assistant Professor Department of Civil, Architectural, and Department of Civil, Architectural, and Environmental Engineering Environmental Engineering Drexel University Drexel University
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Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
Introduction to Civil/Structural Introduction to Civil/Structural EngineeringEngineering
Franklin Moon, Ph.D.Franklin Moon, Ph.D.
Assistant ProfessorAssistant Professor
Department of Civil, Architectural, andDepartment of Civil, Architectural, andEnvironmental EngineeringEnvironmental Engineering
Drexel UniversityDrexel University
Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
ObjectivesObjectives
Provide an introduction to EngineeringProvide an introduction to EngineeringIntroduce the mechanics of ‘Spanning Introduce the mechanics of ‘Spanning Across’ (the ‘science’ side of engineering)Across’ (the ‘science’ side of engineering)Introduce the concept of Introduce the concept of PrestressedPrestressedConcrete (the ‘creative’ side of Concrete (the ‘creative’ side of engineering)engineering)Provide insight into the scale (overall size, Provide insight into the scale (overall size, forces, etc.) of Structural Engineeringforces, etc.) of Structural Engineering
Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
Engineering versus Applied ScienceEngineering versus Applied Science
What is the goal of Engineering?What is the goal of Engineering?Create structures, machines, processes, and Create structures, machines, processes, and
networks networks To make things that previously did To make things that previously did not existnot exist
What is the goal of Science?What is the goal of Science?Explain natural systems Explain natural systems To discover things that To discover things that
have long existedhave long existed
Billington, D.P. (1983) “The tower and the bridge,” Basic Books, Inc., Publishers, New York
Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
History of (Civil) EngineeringHistory of (Civil) Engineering
Military Engineering(mid-1600s)
Civil Engineering
1775 1775 -- King Louis XV authorized a King Louis XV authorized a School of Bridges and HighwaysSchool of Bridges and Highways
1794 1794 -- Napoleon developed Napoleon developed EcoleEcolePolytechniquePolytechnique
1835 1835 –– First class of US civil First class of US civil engineers graduatesengineers graduates
ShelterTransportationWater
3 keys to civilization
Structural Engineering
Transportation Engineering
Environmental Engineering
Water Resource Engineering
Architectural Engineering
Geotechnical Engineering
Grayson, L.P. (1993) “The Making of an Engineer: An Illustrated History of Engineering Education in the United States and Canada”
Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
Challenges of Structural EngineeringChallenges of Structural EngineeringBuilding UpBuilding Up Spanning AcrossSpanning Across
Typical Span Lengths ~150 ftTypical Span Lengths ~150 ft
Typical Girder Spacing ~8 ftTypical Girder Spacing ~8 ft
Good DurabilityGood Durability
Drexel UniversityDepartment of Civil, Architectural and
Environmental Engineering 21 February 2006
Introduction to Prestressed ConcreteIntroduction to Prestressed Concrete
MotivationMotivation -- Concrete is “strong” in Concrete is “strong” in compression and “weak” in tensioncompression and “weak” in tension
GoalGoal –– Introduce “internal” forces into the Introduce “internal” forces into the concrete to keep the concrete in concrete to keep the concrete in compression under “everyday loads”compression under “everyday loads”