Hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures as a moving boundary problem

被引：43

作者：

Benes, Michal ^{[1
]}

Stefan, Radek ^{[2
]}

机构：

[1] Czech Tech Univ, Fac Civil Engn, Dept Math, Prague 16629 6, Czech Republic

[2] Czech Tech Univ, Fac Civil Engn, Dept Concrete & Masonry Struct, Prague 16629 6, Czech Republic

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2015年 / 85卷

关键词：

Concrete; High temperature; Spalling; Hygro-thermo-mechanical analysis; Moving boundary; Thermal stress; Pore pressure; Finite element method; HIGH-PERFORMANCE CONCRETE; FINITE-ELEMENT-ANALYSIS; PORE PRESSURE; HYGROTHERMAL BEHAVIOR; PHYSICAL PHENOMENA; MODELING CONCRETE; COUPLED HEAT; FIRE; TRANSPORT; STRESS;

D O I：

10.1016/j.ijheatmasstransfer.2015.01.050

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A mathematical model allowing coupled hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures by means of the moving boundary problem is presented. A simplified mechanical approach to account for effects of thermal stresses and pore pressure build-up on spalling is incorporated into the model. The numerical algorithm based on finite element discretization in space and the semi-implicit method for discretization in time is presented. The validity of the developed model is carefully examined by a comparison between the experimentally determined data stated in literature and the results obtained from the numerical simulation. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：110 / 134

页数：25

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