Παθητικός έλεγχος των κατασκευών: πειραματική πιστοποίηση αποσβεστήρων ελεγχόμενης μάζας
Passive control of structures: experimental verification using tuned mass dampers
Προβολή/ Άνοιγμα
Συγγραφέας
Καραΐσκος, Γρηγόριος Κ.Όνομα μέλους επιτροπής
Παπανικολάου, Παναγιώτης
Καραμάνος, Σπύρος
Όνομα Επιβλέποντος
Παπαδημητρίου, Κωνσταντίνος
Ημερομηνία
2008Γλώσσα
en
Πρόσβαση
ελεύθερη
Επιτομή
The focus of this thesis is to review and experimentally verify the effect of vibrational
control systems applied in tall and flexible structures. The installation of these systems on
new and existing structures aim at the spectacular improvement of the structural dynamic
behavior under different types of manmade and ambient excitations on the concepts of
structural safety and operational conditions.
The control theory of this thesis is applied for the design of Passive Control Systems and
more specifically for the design of Tuned Mass Damper (TMD) installed properly on the
main structure. The main mass of the Tuned Mass Damper, which is named as secondary
system, is significantly smaller than the main mass of the primary system which is a
Single Degree of Freedom (SDOF) system.
A series of experiments with one and two TMDs installed on a SDOF modeled small
laboratory structure are designed, constructed and performed. The structural behavior of
the laboratory structure was tested by subjecting to artificially induced harmonic
excitation and one of the components available during the strong El Centro earthquake.
The main modal characteristics of the combined primary-secondary system studied are
the modal frequencies, the damping coefficients and the mass ratios between primary and
secondary systems.
A smart laboratory technique for damping improvement of structures was also employed
to both primary and secondary systems and it is shown that sensibly contributes to
vibration attenuation of the primary system.
All the experimental concepts and results are discussed herein and demonstrate the
effectiveness and reliability of Passive Control Systems installed on tall and flexible
structures that are susceptible to strong winds and earthquake events.
Ακαδημαϊκός Εκδότης
Πανεπιστήμιο Θεσσαλίας. Πολυτεχνική Σχολή. Τμήμα Μηχανολόγων Μηχανικών Βιομηχανίας.