I.S. ENV 1998-1-4:1996

Foreword
1 General
  1.1 Scope
  1.2 Distinction between principles and Application
      Rules
  1.3 Assumptions
  1.4 Definitions
  1.5 S.I. Units
  1.6 Symbols
2 Information for structural assessment
  2.1 General information and history
  2.2 Minimum input data
3 Evaluation
  3.1 General
  3.2 Modified seismic action. Non seismic actions
  3.3 Modified material strengths and partial safety
  factors related to resistance
  3.4 Structural data and combination of actions
      3.4.1 Estimation of actual structural characteristics
            of building elements before intervention
      3.4.2 Combination of the seismic action
  3.5 Analysis (prior to intervention)
      3.5.1 General
      3.5.2 General methods
      3.5.3 Approximate static non-linear methods
  3.6 Verification (final evaluation)
      3.6.1 Computational verification
      3.6.2 Vulnerability evaluation methods
4 Decisions for structural intervention
  4.1 Post earthquake immediate measures
  4.2 Criteria for a structural intervention
      4.2.1 General criteria
      4.2.2 Technical criteria
      4.2.3 Type of intervention
      4.2.4 Ductility considerations
      4.2.5 Non-structural elements
      4.2.6 Justifications of the selected intervention
            type
  4.3 Priority of interventions
5 Redesign of repair and/or strengthening
  5.1 Redesign procedures
  5.2 Revised gamma[m] factors
  5.3 Basic data for forte transfer
      5.3.1 Compression against pre cracked interfaces
      5.3.2 Adhesion between non-metallic materials
      5.3.3 Friction between non-metallic materials
      5.3.4 Load transfer through resin layers
      5.3.5 Clamping effect of steel across interface
      5.3.6 Dowel action
      5.3.7 Anchoring of new reinforcement
      5.3.8 Welding of steel elements
      5.3.9 Connections of timber-to-timber elements
  5.4 Local and global ductility
      5.4.1 General
      5.4.2 Modified behaviour factors
  5.5 Analysis (determination of action-effects) after
      the Intervention
  5.6 Post-Intervention stiffnesses and resistances
      5.6.1 General
      5.6.2 Analytical estimation of stiffness and
            resistance
      5.6.3 Simplified estimation of stiffness and
            resistance
  5.7 Verification
6 Quality assurance of interventions
  6.1 Quality assurance as a performance criterion
  6.2 Quality control of redesign documents
  6.3 Quality control of execution
  6.4 Maintenance
Annexes
Annex A (informative) Post earthquake measures
Annex B (informative) Information for structural
        assessment
Annex C (informative) Conceptual bases for Design
        Documents allowing for reduced a[g]-values
        in assessment and redesign operations
Annex D (informative) Vulnerability methods
Annex E (informative) Quality assurance of interventions
Annex F (informative) Particular considerations for
        historical buildings and monuments
Annex G (informative) Specific provisions for concrete
        structure
Annex H (informative) Specific provisions for steel
        structures
Annex J (informative) Specific provisions for timber
        structures
Annex K (informative) Specific provisions for masonry
        structures

Provides criteria for the evaluation of the seismic performance of existing individual structures.