Quasi-Static Cyclic Testing of a Drift-Sensitive Sub-Assembly of Non-Structural Elements with Low-Damage Characteristics

Abstract

In an ongoing effort to improve the seismic performance of non-structural elements (NSEs), a precast concrete cladding system with novel rocking connections has been recently developed at the University of Canterbury, New Zealand. In this system, cladding panels are attached to the structure through steel-embeds with vertical slots placed at four corners of the panel. The panels sit on the structure at the locations of weld-plates in the panels. The steel embeds allow the panels to rock under inter-storey drifts while the weld-plates transfer the gravity loads to the structure. This allows for the accommodation of significant drift demands, delaying and minimising damage to the cladding system.

This design has been validated as a low-damage solution, but its interaction with other drift-sensitive non-structural elements such as partition walls and glazed curtain walls has not been investigated. Moreover, as air and watertightness are desired attributes of cladding systems, satisfactory weather-tightness performance of the cladding system is also essential.

This study investigates interactions between a sub-assembly of low-damage internal partition walls, glazed curtain walls and the novel cladding system. The test results will provide essential information on the applicability and effectiveness of this cladding system as an alternative to conventional systems.