ISO 22762-5:2021

Overview

ISO 22762-5:2021 - Elastomeric seismic-protection isolators: Part 5 - Sliding seismic-protection isolators for buildings specifies minimum requirements and test methods for flat sliding seismic-protection isolators and the materials used in their manufacture. It applies to flat sliding isolators that protect buildings from earthquake damage, where each slider is mounted on elastomeric bearings to provide vertical compliance and rotational flexibility about horizontal axes.

Key topics and technical requirements

This standard addresses the full lifecycle of sliding isolators, with emphasis on performance, safety and quality control. Major technical topics include:

• Classification and identification
  • Isolator types, sliding friction coefficient categories, cross-section definitions.
• Requirements
  • General functional and performance requirements, tolerances, design compressive force and horizontal velocity considerations.
• Materials
  • Specifications and test methods for rubber materials, sliding materials, and steels used for flanges, plates and backing components.
• Testing and performance evaluation
  • Type and routine tests including:
    • Compression, shear stiffness and friction coefficient tests
    • Compressive-shear tests
    • Dependence tests: compressive force, velocity, repeated deformation, temperature, vertical loading time
    • Ultimate shear and durability tests (degradation and creep)
  • Rubber-specific tests: tensile, hardness, ozone resistance.
• Design rules
  • Vertical stiffness, horizontal properties, maximum displacement and compressive load limits for elastic sliding bearings.
• Manufacturing and QA
  • Tolerances, measurement methods, marking and labelling, test methods and quality assurance procedures.

Applications and users

ISO 22762-5 is intended for practical use where seismic isolation is specified or evaluated:

• Structural and seismic engineers designing base-isolated buildings
• Manufacturers developing and producing sliding seismic-protection isolators
• Testing laboratories performing type and routine tests, durability and material tests
• Specifiers, procurement teams and building authorities writing performance-based specifications and conformity checks
• Consultants and certification bodies responsible for verification, marking and quality assurance

Typical applications include base isolation systems for small-to-large buildings seeking reduced earthquake forces, improved post-earthquake functionality and controlled displacement via elastomeric-supported sliding bearings.

Related standards

• ISO 22762 series (other parts cover general test methods and related isolator types). Check the ISO website for the complete series and cross-references (ISO/TC 45 responsibility).

Keywords: ISO 22762-5:2021, sliding seismic-protection isolators, elastomeric isolators, seismic isolation, test methods, durability testing, rubber material tests, building protection.