Experimental Investigation on Composite Seismic Isolation System

Abstract

The objective of the present work is to propose a new composite seismic isolation system device based on the cable-sliding friction aseismic bearing (CSFAB). Multi-chip steel spiral spring (MSSS) are characterized by unique mechanical properties due to elastic recovery capability. An isolation bearing system based on a MSSS elastic effect is intended to provide recovery properties to reduce or eliminate the residual deformations. The device concept is based on two separate systems, one to transmit the vertical load and to act as a lateral restrainer at meantime, the other contributes to the automatic reset functions in the system. This article presents in detail the mechanical components of the innovative device focusing on its main properties. The load-deformation curve established in this paper is verified to be efficient in describing the mechanical characteristics of the device through experiment. The results could provide reference for study and application of the new composite seismic isolation system.

Sustainable Earthquake Resilience with the Versatile Shape Memory Alloy (SMA)-Based Superelasticity-Assisted Slider

“…SSS has recently been proposed [72][73][74] to overcome some of these shortcomings due to its specifically pioneered structure, its construction-industry-friendly characteristics, and its other advantageous features such as the versatility provided by its alternative novel configurations. Figure 2 summarizes the aforementioned review, giving the attention only to the SMAbased sliding ISs, as SSS falls in this category and differs from other similar ISs that include SMA-based rubber bearings [75][76][77][78][79] and the ISs with steel cables [79][80][81][82][83]. The solid arrows connecting Figure 2a-j demonstrate the progress made by SSS and its significance.…”