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• The traditional engineering solutions to these problems, based on “static force” and “static  response”, are no longer valid in most cases.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.

Learning Outcomes

• 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

 

Course Contents

 

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

Multi-Degree-of-Freedom Systems

a. Formulation of matrix equations of motion

b. Analysis of free vibrations 

c. Modal analysis and forced vibrations

d. Nonlinear dynamic response

Continuous Structures

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

Random Vibrations

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

Reference Books

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.

International Standards/Guidelines

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

4) ASCE/SEI 41-13 (2014): Seismic Rehabilitation of Existing Buildings (ASCE/SEI 41-13)

5) Council on Tall Buildings and Urban-Habitat (2008): Recommendations for the Seismic Design of High-Rise Buildings.

6) PEER/ATC-72-1 (2011): Modeling and Acceptance Criteria for Tall Buildings, USA

7) ASCE 7-16 (2017): Minimum Design Loads and Associated Criteria for Buildings and Other Structures (ASCE/SEI 7-16)

Research Journals:

1) Earthquake Engineering & Structural Dynamics, Wiley
2) Engineering Structures, Elsevier
3) The Structural Design of Tall and Special Buildings
4) Soil Dynamics and Earthquake Engineering, Elsevier
5) Journal of Structural Engineering, ASCE
6) ACI Structural Journal, ACI
7) Structural Engineering International Journal, IABSE
8) Magazine of Concrete Research, ICE

Internet Resources

Useful Websites

1) http://peer.berkeley.edu/
2) https://www.fema.gov/
3) www.ctbuh.org
4) www.structuralengineering.info
5) https://earthquake.usgs.gov/
6) http://www.iris.edu/hq/
7) http://ds.iris.edu/ieb/

Major Ground Motion Databases

1) USGS Earthquake Catalog: https://earthquake.usgs.gov/
2) PEER Ground Motion Database: https://ngawest2.berkeley.edu/site
3) British Geological Survey Database: http://quakes.bgs.ac.uk/
4) COSMOS Ground Motion Data Center: http://www.cosmos-eq.org/
5) K-NET and KiK-net, the NIED Strong-motion Seismograph Network Database: http://www.kyoshin.bosai.go.jp/

Magazines/Articles

http://www.structuremag.org/
https://www.istructe.org
http://ctbuh-korea.org/ijhrb/index.php
https://www.express.pk/story/968021/
http://www.technologyreview.pk/the-science-of-earthquakes/
http://www.technologyreview.pk/12-years-october-earthquake-pakistan-prepared-handle-another-big-one/

Video Playlists

1) Nonlinear Modeling and PERFORM 3D Seminar by Graham H. Powell

Description: Four valuable sessions on nonlinear modeling of structural components + Hands-on training sessions PERFORM 3D.

Link: Click Here

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.

Link: Click Here

3) Computers and Structures, Inc. (Youtube Channel)

Description: CSI Watch and Learn Video Tutorials

Link: Click Here

ETABS: Click Here

PERFORM 3D: Click Here

4) International Seminar on Design of Tall Buildings – November 2016 (Bangkok)

Description: Hands-on training sessions of different finite element modeling and analysis software (SAP, ETABS, SAFE and PERFORM 3D)

Day 1 (Training on Other CSI Software):

Link: Click Here

Day 2 (Training on PERFORM 3D):

Link: Click Here

5) Lecture Series on Performance Based Design: State of Practice for Tall Buildings

Description: A full playlist (presentations) from the 2014 Earthquake Engineering Research Institute (EERI) Technical Seminar Series – “Performance Based Design: State of Practice for Tall Buildings”.

Link: Click Here

6) Talk and Group Panel Discussion on Performance-based Design

Description: Special Talk on PBD by Mr. Ron Klemencic at the Asian Institute of Technology (AIT), Thailand, November 2017.

Link: Click Here

7) Ashraf Habibullah Talks

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.”

Links:

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

Link: https://www.youtube.com/user/IRISEnO

Grading Scheme

Assignments + Quizzes: 20%
OHT Exams: 30%
Term Project: 10%
End Semester Exam: 50%
Total: 100%

Instructor

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: fawad@nice.nust.edu.pk
Office No: 118, 1st Floor, NIT Building, SCEE, NUST