2000 Fiscal Year Final Research Report Summary

METHODS TO PREDICT THE TIME OF CREEP FAILURE

Research Project

Project/Area Number	09650557
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Geotechnical engineering
Research Institution	Toyota College of Technology
Principal Investigator	AKAGI Tomoyuki Civil Engineering, Toyota College of Technology Professor, 環境都市工学科, 教授 (90006685)
Co-Investigator(Kenkyū-buntansha)	ITO Takashi Civil Engineering, Toyota College of Technology Associate Professor, 環境都市工学科, 助教授 (50193496)
Project Period (FY)	1997 – 2000
Keywords	Rocks / Creep Failure / Long Term Strength / prediction
Research Abstract	The creep characteristic of soft rocks should be evaluated by considering the creep failure. If the creep failure is not likely to occur, creep characteristics can be expressed in terms of creep coefficients and delay time constants. we presented the some ways of estimating creep failure time. At the acceleration creep step, we applied a technique of Saito. Then, it considered about the relation between the prediction time and the prediction precision. At the secondary creep step, we examined about the effectiveness of the way of prediction based on the relation between the minimum strain rate and the creep failure time. Lastly, we examined about the possibility of prediction at the step in the early stages. In this paper, we consider the way of the precision which used these techniques of estimating creep failure time.

(2 results)