|Table of Contents|

Study of Number of Acoustic Emission with Gray Model in Compression Process of Concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2008年03期
Page:
42-46
Research Field:
Publishing date:
2008-09-20

Info

Title:
Study of Number of Acoustic Emission with Gray Model in Compression Process of Concrete
Author(s):
LIN Feng;  LI Shu-lin;  XUE Yun-liang;  WANG Ming
School of Architectural and Civil Engineering, Xiamen University, Xiamen 361005, Fujian, China
Keywords:
concrete;  gray model;  acoustic emission;  reduced coefficient;  precision of prediction
PACS:
TU37
DOI:
-
Abstract:
The whole compression failure process of acoustic emission test in single axial of concrete was established using GM(1,1)gray model multi-step prediction. The prediction values were larger than the real values and the precision of prediction was not enough. The characteristics of the reduced coefficients were emphatically discussed by introducing the prediction value reduced coefficients. Results show that the reduced coefficients are almost constant at the beginning of prediction curves and linear relation between the reduced coefficients and known data percent is assumed in the end point. Based on above characteristics, the interpolation method is used to solve the reduced coefficients in order to correctly modify traditional gray model, and the reduced modified GM(1,1)gray model can be built. Through modifying GM(1,1)gray model, a prediction model is set up in indoor acoustic emission test, and the precision of prediction by the correct model of GM(1,1)gray model is more advanced than the precision of prediction by the traditional GM(1,1)gray model.

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Last Update: 2008-09-20