Approximate Methods in Structural Seismic Design

Description

In the structural design of buildings, approximate methods of structural analysis are used in the initial selection of the structural solution, assessment of the main elements' dimensions, and in checking the final results. The most difficult problem in the design of multi-storey buildings is the effect of horizontal forces, either seismic loads or wind pressure, and approximate methods can be very useful. Two types of approximate method are dealt with in this book: methods for determining the stresses and displacements of a given structure by using substitute structures; methods based on global parameters' (seismic coefficients, total area of structural walls, etc). The author has taken advantage of recent developments in computerised structural analysis and finite element analysis to re-appraise existing approximate techniques and to define their scope and limits more accurately. A number of new techniques are proposed. Many numerical examples and comparisons with accurate' methods are given. The book is the result of many years spent by the author in structural design and teaching. While aimed principally at design engineers, it will also be valuable for non-specia and as a teaching aid, especially in connection with first screening' of existing buildings.

"This book...shows how some very simple calculations can produce answers almost identical to those generated from full 3D finite element analyses. this book shows that engineers don't always need a lot of computer power to perform seismic analyses and the techniques described should be useful for any designers who need quick anwsers to what may appear to be very difficult analysis problems - The Structural Engineer. "The advent of computerised structural analysis and, in particular, of finite element programs has opened up vast possibilities for a fundamental reappraisal of existing approximate methods, including a more accurate definition of their scope and limits. A number of new methods are proposed. Many numerical examples and comparisons with "accurate" methods are given" - Concrete International '...will be very useful for designers...a very good addition to the libraries of consulting engineers, engineering organisations, and academic institutions. ...useful book with excellent printing, illustrations, and binding.' - Journal of Structural Engineering