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Structural Identification of Nonlinear Systems Subjected to Quasistatic Loading

  • A. Nappi
Part of the International Centre for Mechanical Sciences book series (CISM, volume 296)

Abstract

During the last decade the mathematical methods developed within the context of System Identification [1–2] have been applied to the solution of ‘inverse problems’ in structural engineering. Most of the research activity in this field has primarily concerned dynamic systems, with the purpose of identifying, on the basis of experimental data, parameters hardly susceptible to be measured directly, such as damping characteristics and local stiffness [3–14]. In certain civil engineering situations, however, measurements have to be made in static conditions on systems which exhibit non-linear behaviour under external actions. An interesting example is provided by models concerned with the flexural behaviour of reinforced concrete beams under cyclic loading [15]. Another case is represented by the parameters related to the local strength of rock masses (e.g.: cohesion and friction angle). Such parameters are hardly measurable ‘in situ’ and sometimes may be estimated through nonlinear response measurements [16–17]. Indeed, the application of system identification to geotechnical problems seems to be very promising and parameter estimation techniques have been the object of remarkable research activity [16–22]. This is mainly due to the importance of ‘in situ’ measurements, which can often provide much more information about large rock masses than laboratory tests.

Keywords

Nonlinear System Kalman Filter External Action Concrete Beam Linear Complementarity Problem 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Wien 1988

Authors and Affiliations

  • A. Nappi
    • 1
  1. 1.Politecnico di MilanoMilanItaly

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