الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
For latticed towers ,diagonal steel bracing members are efficient elements in
resisting seismic motion, and therefore, they are frequently used to control the
lateral displacements of structures .When such structures are subjected to
earthquake motion of even moderate intensity .bracing members typically yield
in tention and lor buckle in compression. The research contains an analytical
procedures for the inelastic dynamic analysis of space trusses using the stepby-step
implicit integration methods. Two methods for solving the dynamic
governing equations are presented .These methods are the linear acceleration
method and the constant average acceleration method .The formulation of
displacement,velocity and acceleration are presented for each method. The
above scheme of integration methods are explained and implemented in a
computer program .The presented analytical procedure is used for the inelastic
deterministic analysis ,in time domain of structures subjected to seismic loads
.The dynamic behaviour of a tower tank and a transmission Tower is
investigated under EL-CENTRO earthquake for different cases. The elastic
and inelastic responses are illustrated and compared for all different cases of
loading. A brief sununary , discussion of the results and conc1ussions are
given