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CE - 809: Structural Dynamics
Description and Rationale
• As modern structures are becoming slender and light, they are also becoming more susceptible to dynamic loadings.
• Various 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• The traditional engineering solutions to these problems, based on “static force” and “static response”, are no longer valid in most cases.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 the 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.
With recent advances in computing and modeling tools, and with growing challenges in terms of increase in population, urbanization, complexities in structural forms and innovative systems, the practicing structural engineers and designers nowadays need to equip themselves with various advanced skills. The demand and complexity is rapidly increasing for built environment including accommodation, offices, and commercial areas to accommodate rapidly growing urban population. Resultantly, the cities and infrastructure of future will need to be denser, complex and taller. These challenges require great expertise and computational capabilities in terms of using state-of-the-art analysis procedures, latest computer modeling software and developing insight into the complex dynamic behavior of structures.
Pakistan is located on a highly earthquake-prone and seismically active part of the world. The country lies on a tectonically active Himalayan orogenic belt developed as a result of slow collision (extended over last 30-40 million years) among the Indian, Arabian, and Eurasian tectonic plates. This geological setting has resulted in a number of active seismic sources and faults in the region which are capable of producing moderate- to large-magnitude earthquakes. Besides having a high level of seismic hazard, the country is also confronted over the years with high rate of population increase and rapid growth of urbanization. With all these challenges and high seismic risk, there is an urgent need of equipping the practicing engineers, designers, structural engineering students with state-of-the-art information about the dynamic analysis of structures.
This course aims to develop basic expertise and skill among students about various practical aspects of dynamic analysis of buildings and structures.
Develop the basic understanding of principles of structural dynamics
Develop the ability to integrate the principles of structural dynamics in structural design of
buildings and structures
Develop the ability to analyze and solve problems in dynamic response and behavior of buildings and structures
Dynamics of Simple Structures (single degree-of-freedom systems)
a. Equation of motion
b. Free vibrations
c. Response to harmonic force
d. Response to periodic force
e. Response to arbitrary dynamic force
f. Nonlinear dynamic response
a. Formulation of matrix equations of motion
b. Analysis of free vibrations
c. Modal analysis and forced vibrations
d. Nonlinear dynamic response
a. Partial differential equations of motions (for strings, bars, beams)
b. Modal analysis
c. Wave propagation analysis
Earthquake Response of Buildings
a. Response spectrum concept
b. Application to earthquake engineering
a. Probability theory, random processes
b. Correlation and spectral density functions
c. Response to stationary random excitations
d. Crossing, peak distributions, extreme value analysis, evaluation of fatigue life
e. Application to wind engineering
Control of Dynamic Response
a. Overview of vibration control
b. Tuned Mass Dampers
c. Active vibration controlvibration control
Term Project: The Dynamic Analysis of a Real Case Study Building
Who Should Attend this Course?
The expected audience for this course includes the following.
Masters and Ph.D. students, Structural designers, practicing engineers and consultants, Architects, planners, Real-estate developers and owners
Textbooks, References and Reading Material
Textbooks: Lecture notes provided by instructor
1) T. Pauley, and M. J. N. Priestley, (1992): Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley and Sons, New York.
2) A. K. Chopra, (1995): Dynamics of Structures-Theory and Applications to Earthquake Engineering, Prentice Hall, New Jersey.
3) R. W. Clough, and J. Penzien, (1993): Dynamics of Structures, McGraw-Hill, New York, 2nd Edition.
4) J. W. Smith, (1988): Vibration of Structures: Applications in Civil Engineering Design, Chapman and Hall, London.
5) W. F. Chen and C. Scawthorn (2003), Earthquake Engineering Handbook.
6) T. Y. Lin and S.D. Stotesbury (1988): Structural Concepts and Systems for Architects and Engineers, 2nd edition, Van Nostrand Reinhold.
7) Graham H. Powell (2010): Modeling for Structural Analysis, Computers & Structures Inc.
8) Edward L. Wilson (2000): Three-Dimensional Static and Dynamic Analysis of Structures, Computers & Structures Inc.
9) Tall and Super-tall Buildings: Planning and Design (2014): Editor: Akbar Tamboli, Publisher: McGraw-Hill Professional, with CTBUH and ICC, ISBN13: 978-0071818711 ISBN: 0071818715
10) James K. Wight (2016): Reinforced concrete: Mechanics and design, 7th edition, Prentice Hall.
11) E. G. Nawy (2009): Reinforced concrete: A Fundamental Approach, 6th edition, Prentice Hall International
12) Arthur H. Nilson, David Darwin, Charles W. Dolan (2005): Design of Concrete Structures, 13th Edition.
13) Bungale S. Taranath (2010): Reinforced Concrete Design of Tall Buildings, Taylor and Francis Group, LLC.
1) TBI (2010): Guidelines for Performance-Based Seismic Design of Tall Buildings – PEER
2) FEMA 356 (2000): Pre-standard and Commentary for the Seismic Rehabilitation of Buildings
3) ATC-40 (1996) Seismic Evaluation and Retrofit of Concrete Buildings, USA
2) Title: “PBD Seminar and Workshop” – AIT Solutions (Youtube Channel)
Description: International Seminar and Workshop on Performance Based Design of Reinforced Concrete Buildings – 27-28 August 2013 – Hosted by the Asian Center for Engineering Computations and Software (ACECOMS) in collaboration with AIT Consulting.
Description: CSI founder and CEO Ashraf Habibullah talks during a one-day seminar titled “The theory and practice of Performance-Based Design: The Future of Earthquake Engineering.”
i. The 4 performance levels in PBD
ii. Nonlinear analysis and energy dissipation
iii. Animations in structural engineering
iv. Strength and deformation of tall structures
v. The Advantage of a Ritz Analysis over an Eigen Analysis in Dynamics
vi. The Power of Virtual Work in Deflection Control of Structures
vii. Optimization in Design of Large Steel Structures
8) IRIS Earthquake Science (Youtube Channel)
Description: Official YouTube channel of Incorporated Research Institutions for Seismology
Assignments + Quizzes: 20% OHT Exams: 30% Term Project: 10% End Semester Exam: 50% Total: 100%
Dr. Fawad Ahmed Najam Assistant Professor (Structural Engineering) NUST Institute of Civil Engineering (NICE) School of Civil and Environmental Engineering (SCEE) National University of Sciences and Technology (NUST) H-12 Islamabad, Pakistan Cell: 92-334-5192533, Email: firstname.lastname@example.org Office No: 118, 1st Floor, NIT Building, SCEE, NUST