【摘要】 伊春西高铁站是中国目前在严寒地区纬度最高的高铁站，其结构可能遭遇多种极端荷载，结构安全性非常重要。为保障高铁站房装配式混凝土雨棚结构在极端环境下的结构安全，采用有限元软件ABAQUS模拟其在不同荷载作用下的响应，分别研究了列车风荷载和轮轨激励振动、极端雪荷载、土体冻融循环对装配式混凝土雨棚结构的影响，分别得到装配式混凝土雨棚结构在上述荷载单独作用以及耦合作用下的结构响应，为严寒地区高铁站台装配式混凝土雨棚的设计提供参考。研究结果表明：高速列车越站行驶产生的振动效应，无论是在单独作用还是在考虑与其他荷载耦合作用时，对雨棚结构的变形都有着明显影响，但对结构应力的增加作用不明显；桩基础冻胀位移会显著增大雨棚结构的应力，并且在单独考虑冻胀位移的影响时，结构的应力达到最大，考虑与其他作用耦合时会降低结构的应力。更多还原

【Abstract】 Yichun West High-speed Railway Station is currently the highest-latitude high-speed railway station in the severely cold regions of China. Its structure may encounter various extreme loads, making its structural safety extremely important. To ensure the structural safety of the prefabricated concrete canopy structure of the high-speed railway stations under extreme environments, the finite element software ABAQUS was used to simulate its responses under different loads. The effects of train wind loads and train-induced vibration from wheel-rail excitation, extreme snow load and soil freeze-thaw cycles on prefabricated concrete canopy structure were investigated, respectively. The structural responses under the independent action and coupling effect of the above loads were obtained, providing a reference for the design of the prefabricated concrete canopy structure of the high-speed railway stations in severely cold regions. The research results show that the train-induced vibration effect caused by high-speed trains passing through the station has a significant impact on the deformation of the canopy structure, whether acting independently or considering the coupling effect with other loads, but its increasing effect on structural stress is not obvious. The frost heave displacement of the pile foundation significantly increases the stress of the canopy structure; furthermore, the structural stress reaches its maximum when the impact of frost heave displacement is considered independently, while considering the coupling effect with other actions reduces the structural stress.更多还原