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Structural dynamics of earthquake engineering: Theory and application using MATHEMATICA and MATLAB
In the present decade, the world has witnessed many great earthquakes like
Bhujj in India in 2001, Iran in 2003, the Asian Tsunami in Indonesia in 2004
and Pakistan in 2005 resulting in the death of thousands of people and
significant property damage. Housing and safety are basic human needs.
Structures adequately designed for usual loads need not necessarily be safe
for earthquake forces. In the case of design to withstand earthquake loading,
it is not practical and economically viable to design the structures to remain
within elastic limits. Cracking of concrete and yielding of steel which would
be considered unacceptable for usual types of loading are depended on to
dissipate the seismic energy without collapse during ground shaking that
may take place infrequently.
Earthquake engineering is a relatively new subject. A dynamic approach,
taking into account the flexibility of the structure and an inelastic response
with ductility, is universally accepted as the appropriate method of analysis
for earthquakes. In view of the earthquake risk in various countries, it is of
paramount importance that civil engineering students are taught the basic
principles of analysis of structures pertaining to earthquakes. As technology
in this area continues to advance, practical dynamic analysis, both linear and
nonlinear, of extremely complicated systems are becoming more commonplace.
Therefore, it is imperative that engineers familiarize themselves with these
modern numerical solution techniques and implementation on digital
computers.
The objectives of this book are to provide engineers and students with an
understanding of the dynamic response of structures to earthquakes and of
the common analysis techniques employed to evaluate these responses. Even
though the book emphasizes numerical solution techniques, a comprehensive
treatment of the classical analytical methods is also included. The first 15
chapters of the book deal with dynamic analysis and the next six chapters are
devoted to the response of the structure due to earthquake excitation. Moreover,
the solution techniques demonstrated throughout the text are versatile and
not limited to one application but are appropriate for many other applications
in civil, mechanical and aerospace engineering. The topics single- and multipledegrees-
of-freedom systems, continuous systems, linear and nonlinear dynamic
response, finite element method, differential quadrature and differential
transformation methods are applicable to earthquake engineering and are
discussed in 21 chapters. Even though there are many general purpose packages
available to calculate the response of structures to earthquakes to the user,
they are like a black box. For understanding the basic principles, a suite of
computer programs in MATHEMATICA and MATLAB are given and they
may be employed for problem solving. Depending on a student’s level of
sophistication, they may write their own program.
This book may not only be used as a textbook but also as a reference book
for practising engineers. The contents of the book are the result of teaching
courses viz: structural dynamics and aseismic design of structures to the
graduate students at PSG College of Technology.
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