APPLICATION OF SURVIVAL ANALYSIS TO DETERIORATED CONCRETE BRIDGES IN EAST JAPAN
-
- YAMAZAKI Takahiro
- 東京大学大学院 工学系研究科
-
- ISHIDA Tetsuya
- 東京大学大学院 工学系研究科
Bibliographic Information
- Other Title
-
- 生存時間解析を用いた東北地方における橋梁コンクリート部材の劣化定量分析
- セイゾン ジカン カイセキ オ モチイタ トウホク チホウ ニ オケル キョウリョウ コンクリート ブザイ ノ レッカ テイリョウ ブンセキ
Search this article
Description
In East Japan, the bridge structures face severe environmental condition which induces composit deterioration of salt damage, frost damage and more. The estimation of deterioration rate and the analysis of predominant factors of deterioration would be effective for improving the efficiency of bridge maintenance. To evaluate the deterioration risk quantitatively, two types of survival analysis, Kaplan-Meier estimator and Cox regression analysis, are applied to the periodic inspection data of bridges in East Japan. KaplanMeier estimator is applied to the PC bridge girders' data. The difference of deterioration rate between deterioration mechanisms can be discriminated by the estimator, and degradation tendency can be determined. Cox regression analysis is applied to RC slabs' data to estimate the respective effect of structural and environmental condition on the deterioration. In this analysis, the predominant risk factors are quantitatively explained, and the validity of estimation is assessed by actual inspection records. Furthermore, by comparing the calcurated hazard rate of individual bridges, the actualized or potential risks are evaluated quantitatively. These results demonstrate the applicability of survival analysis to the inspection data, which can introduce the reasonable insight to bridge maintenance.
Journal
-
- Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management)
-
Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management) 71 (4), I_11-I_22, 2015
Japan Society of Civil Engineers