SWANGREMAINING FATIGUE LIFE AND SERVICE SAFETY ASSESSMENT FOR STEEL BRIDGES: METHODS AND APPLICATION

摘要：

Based on investigation of linear fatigue-damage accumulation theory and fracture mechanics, the deterministic assessment approach was proposed, in which the fatigue failure behavior of existing steel bridges was reflected. According to the stochastic fatigue failure mechanism of existing steel bridges, a probabilistic fracture failure model for members and a systems fatigue reliability assessment model were proposed. Furthermore, based on Monte-Carlo method, a fatigue reliability analysis program was developed to calculate members and system fatigue failure probability of existing steel bridges. The deterministic and probabilistic assessment methods proposed in this paper were applied to evaluate the remaining fatigue life and service safety of an existing railway steel bridge. According to assessment results, the deterministic and probabilistic remaining fatigue life, safe inspection intervals and maintenance strategy are determined, which can control and avoid fatigue failure accident and reduce the contingent disaster in bridge service life.

作者: WANG Chun-sheng FENG Ya-cheng ZHAN Ang YU Xin

作者单位: Key Laboratory for Bridge and Tunnel Engineering of Shaanxi Province, Highway College, Chang’an University,Xi’an 710064, China.

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）