Calibrating Codes Safety Factors for Different Life Cycles – Proposed Simplified Procedure
A simpler method for calibrating code safety factors was employed in the updating of the revised Israeli Code specifications for aseismic bridge building due to a 120-year life cycle. Structures are frequently developed with a 50-year life cycle in mind, however unique or vital infrastructure facilities should be developed with a longer life cycle in mind. Aside from difficulties of reliability and maintenance, this also necessitates the requirement to cover the risk of exceeding characteristic design live loads for an extended period while retaining the same agreed-upon risk levels assumed by various codes as adequate enough for a normal 50-year life cycle. Scaling partial safety factors, or an additional “compensating” factor, is required since these structures are developed utilizing design methodologies, formulations, material characteristic strengths, and partial safety factors in compliance with existing regulations. This paper proposes a streamlined approach for determining an appropriate code safety factor calibration based on structural reliability.
Author (s) Details
Shamir Posner Brown Consulting Engineering LTD., BneiBrak 5120263, Israel.
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