Abstract
In this paper, the idea of using polymer adhesive as a damping layer is proposed. An experimental study of two aluminium cantilevered beams has been conducted. One of them presents a plain cantilevered beam, while the second one considers two aluminium beams bonded with a polymer adhesive of different thickness (0,5; 1,2; 1,75; 3,1 and 5 mm). The polymer adhesive considered in the study is a specially designed flexible two-component grout, which has high damping properties. The aim of the study is to determine dynamic parameters, such as natural frequencies and damping ratios of both beams, based on the tests in which analyzed elements have been induced to vibrations by a modal hammer. The behaviour of the beams under different additional weight, installed at the end of elements, has been studied. The results of the study clearly show that the response of the composite aluminium beam with polymer adhesive inside is substantially different then the response of the plain beam. The application of polymer adhesive leads to significant increase in structural damping. Based on the results, the method of using the polymer adhesive can be considered as an effective one in reduction of structural vibrations.
Highlights
The presence of dynamic loads caused by wind, earthquake or crowd load effect generates structural vibrations that can be dangerous to the strength and stability of civil engineering structures
Dynamic parameters, such as natural frequencies and damping ratios have been calculated for both cantilevered beams, based on the tests in which analyzed elements have been induced to vibrations by a modal hammer
One of them describes a plain cantilevered beam, while the second one present composite beam consisting of two aluminium beams bonded with polymer adhesive of different thickness (0.5; 1.2; 1.75; 3.1; 5 mm)
Summary
The presence of dynamic loads caused by wind, earthquake or crowd load effect generates structural vibrations that can be dangerous to the strength and stability of civil engineering structures (see for example [1,2,3]). The most popular method to reduce structural vibrations generated by dynamic effects is to install additional stiffening elements to increase the overall structural dynamic resistance [8]. Other approaches aiming to reduce structural vibrations are used, for example application of additional elements so as to increase dissipation of energy during excitations (see [911]). The aim of the study is to determine the effectiveness of polymer adhesive in reduction of structural member vibrations. Dynamic parameters, such as natural frequencies and damping ratios have been calculated for both cantilevered beams, based on the tests in which analyzed elements have been induced to vibrations by a modal hammer. The behaviour of the beams under different additional weight, installed at the end of elements, has been studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
