Development of novel isolator for seismic application

The proposed semi-active rolling seismic isolation system offers an innovative solution to address limitations in passive isolators when exposed to near-fault seismic waves with velocity pulses. Passive isolators effectively control acceleration responses against typical far-field seismic waves but can allow excessive displacement responses during near-fault events, risking collisions and structural damage.

This system integrates sloped rolling-type isolators (SRI) with magnetorheological (MR) dampers and earthquake early warning technology. Utilizing the initial acceleration time history after P-wave arrival, it estimates peak floor velocity. A predictive model then applies control laws to determine the optimal voltage for the MR dampers. This proactive approach regulates the SRI displacement response below a predefined threshold prior to intense seismic wave impacts.

Experimental shaking table validation confirms the prototype system’s effectiveness in constraining SRI displacement within acceptable limits. While Canada may experience lower seismic activity than Taiwan, this technology offers wide-ranging applications for general building seismic isolation design and critical infrastructure protection. It presents opportunities for academic collaboration between the two countries, enhancing research capabilities. As climate change impacts intensify, improving disaster resilience becomes crucial, making this system valuable for proactive preparedness. Successful development could also lead to commercial potential in global seismic protection markets.

Faculty Supervisor:

Tony Yang

Student:

Partner:

National Taiwan University of Science and Technology

Discipline:

Engineering

Sector:

Education

University:

The University of British Columbia

Program: