Review on temperature action and effect of steel-concrete composite girder bridge

To understand the temperature action and effect of composite girder bridge in depth, the research status of domestic and overseas, including the temperature action and effect of hydration heat in construction stage, the temperature action patterns and finding values methods in the operation stage, and the calculation methods of temperature effect, was summarized and analyzed. The subsequent research emphases and directions were discussed. Research result shows that the hydration heat temperature effect is an important reason for the early cracking of decks in cast-in-situ composite girder bridges. The accurate selection of applicable hydration heat model and the consideration of the effect of temperature history on the elastic modulus and tensile strength of hardening concrete and the connection stiffness of studs are the keys to accurately calculate the hydration heat temperature effect of composite girder. Three temperature action patterns, including uniform temperature, positive and negative temperature gradients, are generally taken into consideration on the composite girder bridge in the operation environment. The specifications of temperature action patterns and values of composite girder bridges are not coincident due to the differences in climate environments and research histories in different countries. Additionally, the temperature gradients are not obtained based on the statistical analysis and the existing historical meteorological data resources are not fully utilized. The temperature effect calculations of composite girder bridges are mostly based on the finite element numerical simulation. The analytical calculation methods for solving the temperature effect of composite girders are also improved, from taking no account of the interfacial slip and simple steel-concrete uniform temperature difference to considering the interfacial slip and arbitrary temperature distribution of steel and concrete. However, the theoretical model for solving the temperature effect of composite girder with arbitrary boundaries should be strengthened. The future research directions of composite girder bridge temperature problem should focus on the composite girder temperature action pattern based on effect classification, the in-depth understanding the temperature self-generated and secondary effects from the mechanism, and strengthening the long-term temperature measurement to determine the representative values of temperature actions by statistical analysis, as well as fully using the historical meteorological data of the meteorological departments in various regions of China to study the regional differences of the temperature action values. © 2020, Editorial Department of Journal of Traffic and Transportation Engineering. All right reserved.