A fractional order rate approach for modeling concrete structures subjected to creep and fracture

被引：32

作者：

Barpi, F ^{[1
]}

Valente, S ^{[1
]}

机构：

[1] Politecn Torino, Dept Struct & Geotech Engn, I-10129 Turin, Italy

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2004年 / 41卷 / 9-10期

关键词：

cohesive; concrete; crack; creep; fracture; fractional; long-term behaviour; softening; viscosity;

D O I：

10.1016/j.ijsolstr.2003.12.025

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The paper analyses the behaviour of concrete in the case of quasi-static fracture. The attention is focused on the interaction between strain-softening and time-dependent behaviour: a viscous rheological element (based on a fractional order rate law) is coupled with a micromechanical model for the fracture process zone. This approach makes it possible to include a whole range of dissipative mechanisms in a single Rheological element. Creep fracture in mode I conditions is analysed through the finite element method and the cohesive (or fictitious) crack model. The comparison with creep tests executed on three-point bending conditions (three different load levels) shows a good agreement both in terms of failure-lifetime, and, load-displacement. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2607 / 2621

页数：15

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