Multi-metric Model-based Fatigue-life Monitoring of Bridges
The inspection and maintenance of bridges of all types is critical to the safety of the public and often critical to the economy of a region.Fatigue is among one of the most critical damage mechanisms in steel bridges.Fatigue is not readily observable, particularly during the period of crack initiation, which typically corresponds to up to 90% of the fatigue life.Fatigue is considered in the design stage using modern provi sions and, if the critical locations are known a priori, can be monitored by direct strain measurement and visual inspection.However, for todays complex civil infrastructure, the critical locations are numerous and often difficult to identify.This paper presents an innovative framework for fatigue assessmentat arbitrary loca tions on the structure combining computational models and limited physical sensor information.The use of multi-metric measurements is advocated to improve the accuracy of the approach.A numerical example is provided to illustrate the proposed fatigue assessment framework.
Hongki Joand B.F.Spencer
University of Illinois at Urbana-Champaign, Urbana, USA
国际会议
哈尔滨
英文
3-11
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）