【摘要】 作为露天环境中的大型钢结构，人字闸门在太阳辐射下会形成非均匀时变温度场，使结构产生复杂的温度效应，若工程中不加以重视，可能会出现焊缝开裂、结构失稳等安全问题。对此，通过改变表面涂层，利用有限元软件对比分析结构温度场分布。结果表明，太阳辐射下，闸门面板与顶梁形成多高温区域阵列式分布的温度场，梁系温度整体分布较均匀；表面涂层对闸门温度场影响较大，采用低辐射吸收率的涂层可使闸门各构件温升减小，最高温度可下降约25%;温度场分布得到较大改善，可有效防止闸门应力场与变形场中可能出现的局部应力集中或变形过大现象。更多还原

【Abstract】 As a large steel structure in the open environment, the miter gate will form a non-uniform time-varying temperature field under the solar radiation, resulting in complex temperature effect on the structure. If not paid attention to the project, it may lead to safety problems such as weld cracking and structure instability. The temperature field of the structure was analyzed by changing the surface coating and using finite element software. The results show that under solar radiation, the gate panel and the top beam form a multi-temperature area array distribution of temperature field, and the beam system temperature distribution is relatively uniform. The surface coating has great influence on the temperature field of the gate. The coating with low radiation absorption rate can reduce the temperature rise of the gate components, and the maximum temperature can be reduced by about 25%. The distribution of temperature field is greatly improved, which can effectively prevent local stress concentration or excessive deformation in the stress field and deformation field of the gate.更多还原