ABSTRACT
Using base-isolated technology in hospitals, teaching buildings, apartments and so on, Seismic energy of superstructure was efficiently dissipated. Great achievements have been achieved by numerous scholars who did well in field of BIS (e.g., Di Sarno et al. 2011; Gueguen 2012; Loh et al. 2013; Ma et al. 2014). Though BIS experienced seismic action successfully (Boroschek et al. 2012), the regularity of BIS influenced by environmental effects, the smart sprawl of BIS design and performance evaluation of BIS experienced earthquakes still need to research further by established SHMS. As the “nervous system” of BIS, SHMS is widely used in Large-span bridges (e.g., Li et al. 2010; Kim et al. 2012; Wang et al. 2013), tunnels (Okundi et al. 2003), dams (Darbre and Proulx 2002) and high-rise buildings (Ni et al. 2009). In order to investigate the degradation mechanism of BIS performance, the SHMS of BIS was established for all kinds of research targets by many scholars (Loh et al. 2013; Zhu and Zhang 2014; Du et al. 2015) referring the SHMS of non-isolated structures. Though the stress of superstructure caused by the non-loading deformation of long irregular concrete BIS is released by flexible isolation layer
lead-rubber bearing, the fitting formulas describing the property of isolation bearings with temperature variation were proposed by Li et al. (2009) and the modified equations of temperature on equivalent stiffness and post-yield stiffness were proposed by Liu et al. (2012). However, concerning environmental temperature on responses of BIS, there are relatively few studies. The dependency relationship between initial displacement of isolation bearings and environmental temperature based on the monitoring data of a large-span base-isolated steel structure were analyzed by Zhu et al (2014). As to seismic isolation design, it is no consideration that the effect of environmental temperature and initial displacement for BIS in Code (2010), which have adverse impact on the performance of BIS.
