Estimation of modal parameters of structures subjected to known base accelerations: Application to shake table tests
Year: 2025
Type: article
Abstract: This paper presents a state space model in conjunction with a maximum likelihood method for extracting the modal parameters in the particular case of structures where the vibration is not caused by external forces acting directly on the system and independently of it, but indirectly due to inertial forces induced by the accelerations applied to the base of the structure. Shake table tests are well-known examples of these situations, but not the only ones. It is shown that in these cases, the state space model used to compute the modal parameters consists of a set of equations that are the same regardless of whether accelerations or displacements are used as output data. This is specially important in shake table tests because it is common to use different type of sensors, so it is suggested to exploit the above-mentioned fact to assess the consistency and reliability of the measurements obtained from different instruments (i.e. accelerometers and displacement transducers). Finally, the proposed method is applied to the experimental data measured during shake table tests conducted on a reinforced concrete structure.
Institutions: Universidad Politécnica de Madrid, Universidad de Granada
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,900
OpenAlex ID: W4409595264