Experimental beyond design and residual performances of full‐scale viscoelastic dampers and their empirical modeling

Abstract

Summary Most past researches relevant to viscoelastic (VE) dampers, regardless of analytical and experimental ones, aimed at their design (or pre‐damage) performance. In reality, however, under maximum considered or greater shaking caused by earthquakes, the shear deformation of the VE dampers installed in a structure may exceed or is even much larger than their nominal design range, thus leading to damage to the VE material. Under this circumstance, the structural design might become not conservative when the viscoelastically damped structure is a retrofit design or is not a supplemental damping design. Therefore, in this study, the beyond design and residual performances of the full‐scale VE dampers after suffering damage are experimentally probed and compared with their design (or pre‐damage) performance tested before. To have more engineering sense in practice, some suitable and conservative empirical post‐damage models through considering reduction factors in the Kelvin‐Voigt model for assessing the beyond design and residual performances of the full‐scale VE dampers after suffering damage are recommended.

Experimental study and multi‐scale refinement model of high damping acrylic polymer matrix VEDs for civil structural seismic retrofit

“…14 Wang et al conducted experimental studies on pre-damage and post-damage VEDs under various temperatures, amplitudes, and frequencies. 15 Xu et al investigated the influencing rules of frequency, temperature, and displacement amplitude on the mechanical properties and damping dissipation performance of VEDs by tests using cyclic loading. [16][17][18][19] It was a key link in the dynamic analysis of viscoelastic damping structures to establish a mathematical model that can accurately describe the dynamic mechanical properties of VEDs.…”

“…Wang et al. conducted experimental studies on pre‐damage and post‐damage VEDs under various temperatures, amplitudes, and frequencies 15 . Xu et al.…”

Experimental and Theoretical Investigation of Viscoelastic Damper by Applying Fractional Derivative Method and Internal Variable Theory

“…The damping performance and energy dissipation capacity of viscoelastic dampers mainly depend on the mechanical properties of viscoelastic materials [5]. Scholars have accomplished a lot of achievements in the research of viscoelastic materials and dampers [6][7][8][9].…”