In order to accurately simulate the temperature inside the box girders, we researched the temperature distributions on cross-sections of box girders by choosing appropriate simulation methods of inner boundary conditions. Taking a concrete box girder bridge as a study case, we measured the temperature distributions on the cross-sections of box girders on site. Moreover, we developed finite element models of the cross-sections of box girders by using MIDAS FEA software to analyze the influences of four simulation methods of inner boundary conditions (namely, measured temperature method, ambient temperature method, mean ambient temperature method and air element method) on the temperature distributions on the cross-sections of box girders, and analyzed the average temperatures of the cross-sections of box girders under historically extreme temperature conditions. The results indicate that the hourly temperature curves of the cross-sections of box girders calculated using the finite element model by the measured temperature method provide the closest agreement with measured hourly temperature curves. When there is a lack of measured temperature data from the inside of the box girders, the hourly temperature curves calculated using the finite element model by the air element method provide the closest agreement with measured hourly temperature curves. The influence of four simulation methods of inner boundary conditions on the average temperatures and positive vertical temperature gradients on the cross-sections of box girders is negligible. The air element method can be used to analyze the temperature distributions on the cross-sections of box girders under historically extreme temperature conditions. The air element method is proposed to carry out the research on the temperature distributions on cross-sections of concrete box girders.

Research on Influence of Simulation Method of Inner Boundary Condition on Temperature Distributions on Cross-Sections of Concrete Box Girders / Xue, J. -Q.; Lin, J. -H.; Briseghella, B.; Huang, F. -Y.. - In: QIAOLIANG JIANSHE. - ISSN 1003-4722. - 49:4(2019), pp. 52-57.

Research on Influence of Simulation Method of Inner Boundary Condition on Temperature Distributions on Cross-Sections of Concrete Box Girders

Briseghella B.;
2019

Abstract

In order to accurately simulate the temperature inside the box girders, we researched the temperature distributions on cross-sections of box girders by choosing appropriate simulation methods of inner boundary conditions. Taking a concrete box girder bridge as a study case, we measured the temperature distributions on the cross-sections of box girders on site. Moreover, we developed finite element models of the cross-sections of box girders by using MIDAS FEA software to analyze the influences of four simulation methods of inner boundary conditions (namely, measured temperature method, ambient temperature method, mean ambient temperature method and air element method) on the temperature distributions on the cross-sections of box girders, and analyzed the average temperatures of the cross-sections of box girders under historically extreme temperature conditions. The results indicate that the hourly temperature curves of the cross-sections of box girders calculated using the finite element model by the measured temperature method provide the closest agreement with measured hourly temperature curves. When there is a lack of measured temperature data from the inside of the box girders, the hourly temperature curves calculated using the finite element model by the air element method provide the closest agreement with measured hourly temperature curves. The influence of four simulation methods of inner boundary conditions on the average temperatures and positive vertical temperature gradients on the cross-sections of box girders is negligible. The air element method can be used to analyze the temperature distributions on the cross-sections of box girders under historically extreme temperature conditions. The air element method is proposed to carry out the research on the temperature distributions on cross-sections of concrete box girders.
2019
49
4
52
57
Research on Influence of Simulation Method of Inner Boundary Condition on Temperature Distributions on Cross-Sections of Concrete Box Girders / Xue, J. -Q.; Lin, J. -H.; Briseghella, B.; Huang, F. -Y.. - In: QIAOLIANG JIANSHE. - ISSN 1003-4722. - 49:4(2019), pp. 52-57.
Xue, J. -Q.; Lin, J. -H.; Briseghella, B.; Huang, F. -Y.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1287457
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