REDUNDANT CRITERIA OF ENGINEERING STRVCTURE AND ITS DEVELOPMENT

Recent, accidents show that traditional design and assessment of engineering structures could not gUarantee their safety after damaged. People try to introduce new redundant criteria to solve the problem.The concept and definition of redundant criteria are very complicated and on the development. Redundancy is defined in this article. Varied redundant criteria are classified, their characteristics and applications are also reviewed. Finally we discuss some concepts related to redundancy.