STRUCTURAL SAFETY ASSESSMENT OF BRIDGE BASED ON EWMA CONTROL CHART
People have paid great attention all the while to the structural safety assessment of bridge in the academe and the engineering. However, the lack of the document of the old bridge and the change of the structural paramenters in service due to many complicated factors will bring about the great difficulty in the construction of the structural model. And the further challenge of structural safety assessment still lies in the uncertainty of the ambient excitation in the structural health monitoring of bridge by using the classical assessment method that depends seriously upon the certain excitation of the system and the structural model. In this paper, a novel technique is introduced for safety assessment of bridge based on the exponentially weighted moving average (EWMA)control chart. In the context, the effect of live-load deflection of the bridge girder is firstly extracted from the history data of total deflection by wavelet analysis. Further more, the structural safety assessment of the real bridge is completed for demonstration by EWMA control chart, according to the distribution of the statistic outside the control limits at the chart. The result indicates that the proposed method is effective in structural safety assessment of bridge without the structural model and certain excitation, avoiding the huge shortcoming of the traditional assessment.
Bridge structural safety assessment EWMA control chart wavelet analysis
Zongbao Liang Weimin Chen Yumei Fu Yong Zhu Peng Zhang
The Key Laboratory for Optoelectronic Technology & System, Education Ministry of China, Chongqing University,400044,Chongqing, China
国际会议
南京
英文
345-353
2006-09-24（万方平台首次上网日期，不代表论文的发表时间）