TY  - SER
AU  - Josko Ozbolt
AU  - Ivica Kozar
AU  - Rolf Eligehausen 
AU  - Goran Periskic
TI  - Three-dimensional FE analysis of headed stud anchors exposed to fire
SN  - 1598-8198
KW  - Concrete
KW  - High Temperature
KW  - 3D Finite Element Analysis
KW  - Microplane Model
KW  - Thermo-mechanical model
KW  - Headed studs
N2  - In the present paper a transient three-dimensional thermo-mechanical model for concrete is presented. For given boundary conditions, temperature distribution is calculated by employing a three-dimensional transient thermal finite element analysis. Thermal properties of concrete are assumed to be constant and independent of the stress-strain distribution. In the thermo-mechanical model for concrete the total strain tensor is decomposed into pure mechanical strain, free thermal strain and load induced thermal strain. The mechanical strain is calculated by using temperature dependent microplane model for concrete (Ozbolt, et.al. 2001). The dependency of the macroscpic concrete properties (young's mudulus, tensile and copressive strengths and fracture energy ) on temperature is based on the available experimental database. The stress independent free thermal strain is calculated according to the proposal of Nielsen, et. al. (2001). The load induced thermal strain is obtained by employing the bi-parabolic model, which was recently proposed by Nielsen, et.al (2004). It is assemed that the total load induced thermal strain is irrecoverable, i.e., creep component is neglected. The model is implemented into a three-dimensional transient thermal FE analysis was carried out for three embedment d
UR  - DOI: 10.12989/cac.2005.2.4.249
ER  -