ISO 22762-3:2024

Overview

ISO 22762-3:2024 - "Elastomeric seismic-protection isolators - Part 3: Applications for buildings - Specifications" defines minimum requirements and test methods for elastomeric seismic isolators and the rubber materials used to manufacture them. The standard applies to laminated elastomeric isolators (alternate elastomeric layers and reinforcing steel plates) placed between a building’s superstructure and substructure to provide flexibility, damping, and energy isolation at the seismic isolation frequency.

Key topics and technical requirements

The standard addresses the full product lifecycle from design to testing and marking, including:

• Performance requirements

  • Compressive, shear and tensile properties
  • Shear displacement capacity and damping performance
  • Dependence of shear/compressive properties on geometry and material
  • Durability and long-term behaviour

• Materials and components

  • Requirements for rubber material: tensile properties, ageing resistance, hardness, ozone resistance
  • Requirements for reinforcing steel plates, flanges and lead material for lead-rubber bearings (LRB)

• Design rules

  • Shape-factor concepts (first and second shape factor)
  • Calculation of compressive and shear stiffness, equivalent damping ratio
  • Ultimate property diagrams, buckling/roll-out considerations and stability under large deformations

• Quality, manufacturing and dimensional control

  • Manufacturing tolerances, plan dimensions, flatness, offsets
  • Measurement methods, testing equipment and routine versus type tests

• Testing, marking and documentation

  • Type tests, routine tests, test methods and annexes with experimental procedures
  • Marking and labelling requirements and quality assurance provisions

Applications and practical use

ISO 22762-3:2024 is intended for use where elastomeric seismic-protection isolators are specified to reduce earthquake forces transmitted to buildings. Typical applications include:

• Base isolation of new buildings (commercial, public, critical infrastructure)
• Retrofit solutions where seismic isolation is added between superstructure and foundation
• Design verification, factory production control and acceptance testing of isolators
• Specifying material and performance criteria for suppliers and manufacturers

Who should use this standard

• Structural and seismic design engineers specifying base-isolation solutions
• Manufacturers of elastomeric isolators and rubber compounds
• Test laboratories performing type and routine tests
• Building owners, asset managers and code authorities evaluating isolation systems
• Procurement teams ensuring conformity and traceability

Related standards

ISO 22762-3:2024 is part of the ISO 22762 series for elastomeric seismic-protection isolators. Users should consult other parts of the series and relevant seismic design codes for comprehensive design and implementation requirements.

Keywords: ISO 22762-3:2024, elastomeric seismic-protection isolators, seismic isolation, buildings, rubber material, shear stiffness, compressive stiffness, damping, lead-rubber bearings.