胶合木连续梁廊桥静力与稳定性分析

Static and stability analysis of glulam continuous beam lounge bridge

木结构建筑作为我国宝贵文化遗产值得传承和发扬。本研究针对湖南洞口雪峰山胶合木连续梁廊桥,采用有限元软件Midas Civil,考虑廊屋和桥面结构之间的受力变形耦合效应,建立整体结构模型,分析胶合木廊桥的静力与稳定特性。计算廊桥在不同荷载工况下结构内力和变形,按最不利荷载组合,验算廊桥结构的强度、刚度与稳定性。获得了廊桥结构的受力规律,验算表明廊桥设计满足结构安全要求,同时也证明了国产兴安落叶松可用于木结构桥梁。研究结果可为工程实际应用提供理论依据。

As the precious cultural heritage of our country, wooden structure building is worth inheriting and developing. In this paper, the finite element software MIDAS civil is used to simulate a glulam continuous beam lounge bridge on the Xuefeng mountain in Dongkou, Hunan province, and the overall structure model is established to analyze the static and stable characteristics of glulam bridges, considering the stress-deformation coupling effect between veranda structure and bridge deck structure. The structure internal force and deformation of the lounge bridge are calculated under different load conditions, and the strength, stiffness and stability of the lounge bridge structure are checked by the most unfavorable load combination. The force law of the lounge bridge structure is obtained, the checking results show that the bridge design meets the structural safety requirements, meanwhile, the domestic Xingan larch wood can be used for the timber structure bridge. The results can provide theoretical basis for the practical application of engineering.