Đề cương động lực học - P16

School of Civil Engineering, (SCE)


Semester Offering: August

CE72.21 : Structural Dynamics 3(3-0) [Elective course]

Rationale:
As modern structures are becoming more slender and light, they are also becoming more
susceptible to dynamic loadings. Examples of real-life dynamic problems that frequently confront
civil engineers include: aerodynamic stability of long-span bridges, earthquake response of multi-
story buildings, impact of moving vehicles on highway structures, etc. The traditional engineering
solutions to these problems, based on "static force" and "static response", are no longer valid in
most cases. Many of these problems have to be tackled by applying knowledge of structural
dynamics. Thus, a basic understanding of the dynamic behavior of structures as well as the
underlying principles is essential for structural engineers.

Catalog Description:
Dynamics of simple structures (single-degree-of-freedom systems); multi-degree-of-freedom
structures; continuous structures; earthquake response; random vibrations; control of dynamic
response.

Pre-requisite(s):
None

Course Outline:
I Dynamics of Simple Structures (single-
degree-of-freedom systems)
1. Equation of motion
2. Free vibrations
3. Response to harmonic force

4. Response to periodic force
5. Response to arbitrary dynamic force
6. Nonlinear dynamic response
II Multi-Degree-Of-Freedom Structures
1. Formulation of matrix equations of motion
2. Analysis of free vibrations
3. Modal analysis and forced vibrations
4. Nonlinear dynamic response
III Continuous Structures
1. Partial differential equations of motions (for
strings, bars, beams)
2. Modal analysis
3. Wave propagation analysis
IV Earthquake Response
1. Response spectrum concept
2. Application to earthquake engineering
V Random Vibrations
1. Probability theory, random processes
2. Correlation and spectral density functions
3. Response to stationary random excitations
4. Crossing, peak distributions, extreme value
analysis, evaluation of fatigue life
5. Application to wind engineering
VI Control of Dynamic Response
1. Overview of vibration control
2. Tuned Mass Dampers
3. Active control

Textbook:
Lecture notes provided by the instructor.

References:
R. W. Clough, and J. Penzien, (1993):
Dynamics of Structures, McGraw-Hill, New York, 2nd Edition.
A. K. Chopra, (1995):
Dynamics of Structures-Theory and Applications to Earthquake Engineering, Prentice Hall,
New Jersey.
J. W. Smith, (1988):
Vibration of Structures: Applications in Civil Engineering Design, Chapman and Hall,
London.
T. R. Tauchert, (1974):
Energy Principles in Structural Mechanics, McGraw-Hill, ISE.
H. Bachmann, and W. Ammann, (1987):
Vibrations in Structures-Induced by Man and Machines, Series: Structural Engineering
Documents. Vol. 3e. International Association for Bridge and Structural Engineering (IABSE),
Zurich, Switzerland.
D. E. Newland, (1993):
An Introduction to Random Vibrations, Spectral and Wavelet Analysis, Longman, 3rd Edition,
London.
S. H. Crandall, and W. D. Mark, (1963):
Random Vibration in Mechanical Systems, Academic Press, New York.

Journals/Magazines/Websites:
Earthquake Engineering and Structural Dynamics.
Engineering Structures.

Grading System:
The final grade will be computed according to the following weight distribution: Mid-Semester Exam
(30%), Assignments (20%), Final Exam (50%). Open book examination is used for both mid-
semester and final exams.

Instructor(s):
SECTION NAME
A
Dr. Pennung Warnitchai
Course Structure
STE delivers three types of courses: basic, advanced and interdisciplinary. Basic courses
focus on the specific aspects of structural systems. They are offered in five areas - (a)
Analysis and Computations (CE72.1x), (b) Dynamics of Structures (CE72.2x), (c)
Mechanics of Structures (CE72.3x), (d) Material Technology (CE72.4x), and (e) Structural
Design (CE72.5x). While advanced and interdisciplinary courses (CE72.6x) address new
frontiers or the integration of skills in a holistic manner and are designed specifically for
doctoral or advanced master's students. Advanced courses provide emerging concepts and
techniques in Structural Engineering.
In offering opportunity and choice, students can design their own study programs
according to their inclinations and future career objectives. In addition to the courses
specified below, students, under the guidance of their academic advisors, can select courses
from a wide range of electives from other fields/schools as part of an approved study plan.
August(First) Semester
CE72.11 Computer Methods of Structural Analysis Elective 3 credits
CE72.21 Structural Dynamics Elective 3 credits
CE72.31 Continuum Mechanics Elective 3 credits
CE72.41 Advanced Concrete Technology Elective 3 credits
CE72.61
Nonlinear Finite Element Methods for Solids and
Structures
Elective 3 credits
CE72.63 Programming Tools in Engineering Elective 3 credits
January(Second) Semester
CE72.12 Finite Element Methods in Engineering Elective 3 credits

CE72.22 Wind and Earthquake Engineering Elective 3 credits
CE72.32 Tall Buildings Elective 3 credits
CE72.42 Experimental Methods in Structural Engineering Elective 3 credits
CE72.51 Advanced Steel Structures Elective 3 credits
CE72.52 Advanced Concrete Structures Elective 3 credits
CE72.62
Forensic Engineering, Structural Evaluation and
Retrofitting of Structures
Elective 3 credits
CE72.64 Fiber Reinforced Composite Structures Elective 3 credits
CE72.65 Structural Optimization Elective 3 credits
CE72.90 Advanced Topics in Bridge Engineering Elective 3 credits
CE72.9003
Selected Topic: Introduction to Materials Science and
Engineering
Elective 3 credits
CE72.9004
Selected Topic: New Concrete Materials and Special
Concretes
Elective 3 credits
Inter-Semester Period
Institute-wide course/English or Computer-based course Elective 2 credits
August(Third) Semester
Thesis Option
Thesis proposal preparation/defense and data/information collection
22 credits
Research Study Option
Coursework (continued)
Elective(s) 12 credits
January(Fourth) Semester

Thesis Option
Thesis preparation and final thesis report defense
continued
Research Study Option
Research study preparation and final research report defense
CE81.72 : Dynamics of Offshore Structures 3(3-0)

Rationale:
The objectives are to introduce the fundamental of oceanography, basic fluid mechanics, wave
theory, hydrodynamics, naval architecture and structural analysis to meet the needs of offshore
engineers involved with either fixed or floating offshore structures. As well as equations and
theoretical results, sections on model testing, full scale measurements, design and certification
are included to ensure that the course presents a balanced treatment of fundamental and
practical issues.

Catalog Description:
The ocean environment; Basic fluid mechanics; Gravity wave theories; Fluid loading on offshore
structures; Structural response; Hydrostatics of floating bodies; Dynamic response of floating
structures in waves; Model testing of offshore structures.

Pre-requisite(s):
None.

Course Outline:
I. The ocean environment
1. Surface gravity water waves and
wave loading
2. Current and current loading
3. Wind and wind loading
II. Basic fluid mechanics

1. Conservation of mass
2. Conservation of momentum
3. Circulation and vorticity
4. The stream function and velocity
potential
III. Gravity wave theories
1. Introduction
2. Classification of waves
3. Breaking waves and wave theory
selection
4. Waves as random processes
5. Selection of design wave spectra

IV. Fluid loading on offshore structures
1. Inertia coefficients
2. Drag coefficients
3. Wave forces on stationary slender
members
4. Wave forces on moving members
V. Structural responses
1. Reponses of single-degree-of-
freedom systems
2. Responses of multi-degree-of-
freedom systems
3. Responses of single column
structures
4. Response of multi-leg gravity
structures
5. Responses of lattice-type structures
VI. Dynamic response of floating

structures in waves
1. Hydrostatics of floating bodies
2. Linear response of moored-ship
systems
3. Nonlinear response of moored-ship
system
VII. Model testing of offshore structures
1. Theory of structural models
2. Loading system and laboratory
techniques
3. Instrumentation Principles and
application
4. Accuracy and reliability of structural
models


Textbook:
Lecture notes provided by the instructor.

References:
Clough, R. W. and Penzien J., (1993), Dynamics of Structures , McGraw-Hill , New York , 2
nd Edition.