Bond-slip parameter estimation in fiber reinforced concrete at failure using inverse stochastic model

被引：20

作者：

Kozar, Ivica ^{[1
]}

Malic, Neira Toric ^{[1
]}

Simonetti, Danijel ^{[1
]}

Smolcic, Zeljko ^{[1
]}

机构：

[1] Univ Rijeka, Fac Civil Engn, R Matejcic 3, Rijeka 51000, Croatia

来源：

ENGINEERING FAILURE ANALYSIS | 2019年 / 104卷

关键词：

Debonding; Failure mechanism/analysis; Fracture; Probability; Tensile properties; Inverse model; Parameter estimation;

D O I：

10.1016/j.engfailanal.2019.05.019

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fiber reinforced concrete is an emerging material in civil engineering with many desirable properties. However, material model for this material has not been yet firmly established. Failure model has a particular property: fibers do not break in failure, they got pulled-out of the concrete matrix. Accordingly, the bond between the fiber and the matrix (bond-slip law) strongly influences material behavior in failure. In attempts to experimentally determine the bond-slip law rather large spread in results becomes evident. This variance in results can be simulated by replacing the deterministic model with the stochastic description based on the idea from the fiber bundle model. Stochastic parameters are difficult to guess so mathematical procedure based on inverse analysis has been devised. The inverse model relies on the non-linear least squares approach combined with order statistics. This novel procedure successfully extracts stochastic bond-slip parameters from experimental results.

引用

页码：84 / 95

页数：12

共 26 条

[1] Statistical models of fracture [J].

Alava, Mikko J. ;

Nukalaz, Phani K. V. V. ;

Zapperi, Stefano .

ADVANCES IN PHYSICS, 2006, 55 (3-4) :349-476

[2]

Arnold B. C., 2008, 1 COURSE ORDER STAT

[3]

Aster R. C., 2005, Parameter estimation and inverse problems, V2nd

[4]

Binoj J., 2019, ENG FAIL ANAL, V95

[5] Irregular lattice model for quasistatic crack propagation [J].

Bolander, JE ;

Sukumar, N .

PHYSICAL REVIEW B, 2005, 71 (09)

[6] Fibre reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering [J].

Brandt, Andrzej M. .

COMPOSITE STRUCTURES, 2008, 86 (1-3) :3-9

[7]

Daniels H., 1945, PHYS ENG SCI, V183

[8] The effect of material density on load rate sensitivity in nonlinear viscoelastic material models [J].

Kozar, Ivica ;

Rukavina, Tea .

ARCHIVE OF APPLIED MECHANICS, 2019, 89 (05) :873-883

[9] Inverse model for pullout determination of steel fibers [J].

Kozar, Ivica ;

Malic, Neira Toric ;

Rukavina, Tea .

COUPLED SYSTEMS MECHANICS, 2018, 7 (02) :197-209

[10]

Kun F., 2007, MODELLING CRITICAL C, P627

← 1 2 3 →