Numerical investigation into thermal load responses of steel railway bridge

International Conference on Civil Engineering and Infrastructural Issues in Emerging Economies 2017

土木建筑工程;经济学

Saravana Raja Mohan, K.^1 ; Sreemathy, J.R.^1 ; Saravanan, U.^2

School of Civil Engineering, SASTRA University, Tamil Nadu, Thanjavur, India^1

Department of Structural Engineering, Indian Institute of Technology Madras, Tamil Nadu, Chennai, India^2

关键词: Effects of temperature;    Expansion and contraction;    Numerical investigations;    Serviceability limit state;    Steel railway bridge;    Temperature field distribution;    Temperature fluctuation;    Temperature variation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/80/1/012042/pdf
DOI  :  10.1088/1755-1315/80/1/012042

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Bridge design requires consideration of the effects produced by temperature variations and the resultant thermal gradients in the structure. Temperature fluctuation leads to expansion and contraction of bridges and these movements are taken care by providing expansion joints and bearings. Free movements of a member can be restrained by imposing certain boundary condition but at the same time considerable allowances should be made for the stresses resulting from this restrained condition since the additional deformations and stresses produced may affect the ultimate and serviceability limit states of the structure. If the reaction force generated by the restraints is very large, then its omission can lead to unsafe design. The principal objective of this research is to study the effects of temperature variation on stresses and deflection in a steel railway bridge. A numerical model, based on finite element analysis is presented for evaluating the thermal performance of the bridge. The selected bridge is analyzed and the temperature field distribution and the corresponding thermal stresses and strains are calculated using the finite element software ABAQUS. A thorough understanding of the thermal load responses of a structure will result in safer and dependable design practices.