Seismic Analysis Of Plane Linear Systems
With Semi-rigid Connections
Author(s)
S. Zdravkovic, D. Zlatkov, B. Mladenovic & M. Mijalkovic
Abstract
In this paper forming of the stiffness and mass matrices for a bar with semi-rigid
connections depending on the level of rigidity of the joint connection will be
presented. These two matrices are introduced into well-known computer
programs to be modified for the dynamic design of a plane linear system whose
connections are semi-rigid. The influence of semi-rigid connections on the
change of dynamic characteristics is illustrated using numerical examples.
Horizontal seismic forces and maximal horizontal displacements of a frame are
computed according to Serbian regulations, based on the circle frequencies and
vibration periods of free horizontal frame vibrations calculated for different
levels of connection rigidity. The results obtained are presented in diagrams.
This paper will also briefly present the results of an integral experimental
investigation of seismic performances of the prefabricated reinforced concrete
structural system AMONT, developed in Serbia and intended for construction of
various types of modern industrial halls. The study has been carried out for the
purpose of attesting the structural behaviour in seismic regions, particularly its
specific connections and links. It is concluded from the results obtained that the
rigidity level of connections should not be neglected, particularly in the analysis
of prefabricated structures. The design allowing for semi-rigid connections is
especially significant in earthquake engineering, because seismic forces cause
the joint connections to become slack, which has not been adequately taken into
consideration in up-to-date dynamic analysis.
Keywords: semi-rigid connections, stiffness matrix, consistent mass matrix,
circle frequency, vibration period, pre-cast reinforced concrete structural
system, seismic design.
Keywords
semi-rigid connections, stiffness matrix, consistent mass matrix,
circle frequency, vibration period, pre-cast reinforced concrete structural
system, seismic design.
Related Book
Other papers in this volume
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