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Hi, Folks ! Welcome to
Structural Analysis I
Hae Sung LeeStructural Analysis Lab, Dept. of Civil and Environmental Eng.
Seoul National UniversitySpring Semester, 2011
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Whos who ? Instructor : Lee, Hae Sung ()
Office : 35-408
Tel : 880-8388
e-mail : [email protected]
Hompage : http://strana.snu.ac.kr
TA : Goh, Heedong/Lee, Hohyun (32-303, 1538)() ()
Class Hours : Wed. 17:00-18:40Fri. 17:00-17:50Fri. 18:00-18:50 (Practice)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Text & Other Tools
Class note by Instructor
Reference- Structural Analysis - Classical and Matrix Approachby Jack C. McCormac and R. E. Elling
- Elementary Structural Analysis 4th Ed. by C. H. Norris- Statically Indeterminate Structures by Chu-Kia Wang
SNUSEA
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Class Contents Introduction of Structural Analysis (1)
Types of Structures and Supports (1)
Free-Body Diagram (2)
Forces and Moments and Their Diagram (2-3)
Analysis of Various Statically Determinate Structures (4-5)
Virtual Work Principles and Related Issues (6-8)
Introduction of Statically Indeterminate Structures (9)
Flexibility Method for Analyzing Statically IndeterminateStructures (10-13)
Influence Lines (14-16)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Evaluation 2 Mid Term Exams(April 8, May 13) : 40 %
Final Exams (June 16, 16:00-19:00) : 30 %
Home work and attendance : 30 %
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Aah.Structural Analysis !!
1
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Structure ?? Definition by Late Prof. Shin
Thing built to safely withstand all possible external forces applicable during itsexpected lifetime by properly connecting solid materials with various shapesaccording to its purpose.
Definition by Live Prof. LeeEverything made by solid materials that you can see !!!
Types Mobile structures : Cars, Airplanes, shipFixed structures : Civil structures (social infrastructures) & Buildings
Purpose : Bridge, Dam, Tunnel, Building
Material : Wooden, Steel, Concrete
Mechanical Behavior : Beam, Truss, Arch, Frame
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Human BodyThe most sophisticated structures in the world designed by God!!!
Shell
Beam
Arch
Column
Footing
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Force Newtons Second Law of Motion
Gravity Newtons Law of Gravitation:
Dynamic Force :
Water, Earth and Wind Pressure
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
City & Structure (1)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
City & Structure (2)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Bridge (1)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Bridge (2)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Bridge (3)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Building (1)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Building (2)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Building (3)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Cultural Facility (1)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Cultural Facility (2)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Troublesome Structures
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Different Structures with same idea
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Different Structures with same idea
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Classification Mechanical Behaviors
- Beam ()- Truss ()- Frame ( , Rahmen)- Arch- Plate and Shell ( )- General Continuous structures ( )
Analysis Method (existence of redundancy)- Statically Determinate ()- Statically Indeterminate ()
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Beam
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Truss
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Frame
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Arch
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Structural Engineering ?? Objective
- Design and construction of structures- Management, maintenance and rehabilitation of structures
Tools- Solid and applied mechanics- Mathematics and numerical methods- Experiences, experiments and statistical data
In Consideration of - Safety and economics- Manageability, maintenance and rehabilitation- Harmony with surroundings (environmental and aesthetic)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Engineering Design ?
Trial SystemInput Response
SatisfyDesign Criteria ?No !!
Modify System
Yes !!
Final System
Analysis
Satisfy Budget ?No !! Yes !!
Design
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Sequence of Structural Construction Feasibility Study
- Economical and Engineering Aspects
Determination of Structural type and Material
Structural Analysis
Preliminary Design
Main Design
Construction- Design and construction of temporary structures- Construction management- Design change
Management and Maintenance
Design Process
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Structural Analysis ??? Objective
- Calculation of structural responses such as stress, strain anddisplacement for given structural properties and external loadingconditions
Purpose- To calculate structural responses as accurately as possible for all
loading conditions applicable during the lifetime of a structure forthe design of a safe and economical structure.
Tools- Healthy body and Smart Brain (Study)- Mathematics (Linear algebra, Calculus, Differential Equation...)- Physics (Statics and Dynamics- Numerical Method (Computer)- Experiments
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Classification of Classic Mechanics
Mechanics( )
Granular Mechanics( )
Thermo Mechanics( )
Solid Mechanics( )
Fluid Mechanics( )
Structural Analysis( )
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Classification of Engineering Problems Direct Problems : (k u) = f (Analysis)
Inverse Problems : Reconstruction
Inverse Problems : System Identification
SystemInput Response
SystemInput Measured Response
SystemInput Measured Response
ErrorError
Error
Error
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Types of Structural Analysis Loading Speed
- Static analysis : neglecting inertia force- Dynamic analysis : with inertia force
Unknowns- Flexibility method : Forces are unknown.- Stiffness method : Displacement is unknown.
Tool- Classic method : (pensile + Paper + Brain + Hand)- Computational method : (+ Computer)
Distribution of Unknowns- Discrete structure (ODE)- Continuous structure (PDE)
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Structural Division ofDept. of Civil and Environmental Eng.
Seoul National University
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Professors
Prof. Hyun Moo KohStructural Engineering Lab.http://sel.snu.ac.kr
Prof. Jae Kwan KimStructural Dynamics Lab.http://dyna.snu.ac.kr
Prof. Hae Sung LeeStructural Analysis Lab.http://strana.snu.ac.kr
Prof. Jae Yeol ChoConcrete Structures Lab.http://concrete.snu.ac.kr
Prof. Ho Kyung KimStructural Design Lab.http://bridge.snu.ac.kr
Structural Analysis Lab
Seoul National University
http://strana.snu.ac.kr
Course Semester Title Contents
Under-
graduate
2-1
2-2
3-1
3-2
4-1
Mechanics of Materials
Applied Dynamics
Structural Analysis 1
Structural Analysis 2
Structural Information Eng.
Statics
Dynamics
Flexibility Method