Damage Avoidance Design of Warehouse Buildings Using the Precast Hollow Core Walls System

Abstract eng:
The need for new seismic design philosophy that has performance traits of conventional ductile concrete monolithic wall systems but without permanent damage potential is presented. Innovative construction methods are proposed that avoid earthquake induced damage by using an entirely precast wall system. The walls consist of a mix of seismic wall panels and non-seismic infill cladding panels. The seismic wall panels are used to seat the rafters. Lateral loads are transmitted via diaphragm action through a roof truss. Damage Avoidance Design (DAD) principles are incorporated by using rocking walls with armoured steel seating. A seven-step design procedure is proposed which includes: assessment of seismic hazard (demand); setting design target displacements (capacity); estimation of effective damping; calculation of the base shear capacity in the form of a lateral pushover curve; design unbonded tendons and/or fuse-bars; re-evaluation of effective damping; and an assessment of seismic resistance adequacy via a demand vs capacity evaluation of the structure.

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