Abstract
A review is made of the development of models used to examine the dynamic response of semi-rigid frames. The connection flexibility is modeled by linear elastic rotational springs. The reducing coefficients and the lateral rigidity values are determined by using a computer program. Response characteristics of frames are compared with reference to their modal attributes.
Highlights
The purpose of engineering design is to produce a structure capable of withstanding the environmental loading to which it may subject to
The primary objective of the present study is to investigate the dynamic characteristics of semi-rigid frames and how connection flexibility influences them
None of them is about the reducing coefficients and lateral rigidity values for different models
Summary
The purpose of engineering design is to produce a structure capable of withstanding the environmental loading to which it may subject to. Linear elastic springs which represent flexible connection behavior are located at the intersection of beam and column. Linear elastic springs are located at the ends of the beam. The main difference between these models is the location of the linear elastic springs This difference affects behavior, dynamic properties and model attributes of frames. The connections are modeled as rotational springs at beam-to-column joints. For the connection with the hinge, rigidity index is zero, and flexural moments do not occur at the ends of frame elements. This value is infinite, and flexural moments occur at the ends of frame elements [3]. Flexural moments at the two ends for a frame element, with spring coefficients represented by Cθ,j and Cθ,k, can be given by. The stiffness matrix of a semi-rigid column element in Figure 1 can be written by
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