温度作用是桥梁结构在建造、使用过程中需要考虑的重要荷载。随着交通网络的延伸，越来越多的桥梁结构受到严酷的环境温度作用，同时桥梁交通环境复杂化也使得桥梁遭受火灾并发生损失的几率增大。深入研究桥梁环境与火灾温度场，识别其作用与效应，有利用从设计、建造与养护等方面保障桥梁结构安全。本文就国内外2020年度桥梁环境温度作用、温致效应、桥梁火灾作用与效应方面最新研究进展进行梳理与总结，并基于以上最新研究进展，对未来桥梁温度作用与效应方面研究热点和方向做了展望。

Temperature action is one of the important loads in bridge construction and operation stages. With the extension of traffic network, severe climate could be expected to cause larger temperature action than those recommended in the specifications. The complexity of traffic environment also increases the probability of bridge fire and related damage. In-depth study of bridge ambient and fire temperature field, and identification of its actions and effects can ensure the safety of bridge from the aspects of design, construction and maintenance. This study reviews the latest domestic and overseas research on ambient temperature action, temperature effect and bridge fire action in 2020, and prospects the hotspots and directions of the future research of bridge thermal action and effects.

国家自然科学基金项目（52178170）