Premature failure of prestressed steel bars

✍ Scribed by A. Valiente; M. Elices

• Book ID: 104383577
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 721 KB
• Volume: 5
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/s1350-6307(98)00002-8

✦ Synopsis

The details of two failures of prestressed steel bars are reported and a failure analysis is carried out using Linear Elastic Fracture Mechanics] the fracture toughness was measured using two standardized procedures and the pertinent stress intensity factor computed by numerical methods[ The analysis of the failures show that the usual design requirements for prestressing bars fail to warn against brittle failures if damage exists[ Some procedures\ based on the concept of damage tolerance\ are suggested to avoid similar accidents[ Þ 0887 Elsevier Science Ltd[ All rights reserved[ Keywords] Damage tolerance\ fracture toughness\ prestressing\ stress intensity factors\ surface cracks[