In order to study the deformation and stress effects of different closure temperatures on bridge structures,taking the Lugou River Extra Large Bridge as the engineering background,a three-dimensional finite element analysis software was used to establish a numerical model of the bridge.Combined with the influence of the construction stage,the influence of temperature on the structural per-formance during the closure section construction of the bridge was analyzed.The results show that the effect of closure temperature on the stress and displacement deformation of the main beam is significant.As the temperature of the bridge increases from 5℃ to 15℃,the impact of temperature on the displacement and deformation of the bridge structure also doubles;When closure temperature changes by 5℃,the stress change amplitude at the lower edge of the main beam section is greater than that at the upper edge,and the maxi-mum difference can reach 32.5%.
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