装配式地下车站附属接口框架力学性能研究
毛良根
Mechanical Performance of Auxiliary Interface Framework in Prefabricated Underground Stations
MAO Lianggen
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作者信息:中铁第四勘察设计院集团有限公司，430063，武汉
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Affiliation:China Railway Fourth Survey and Design Institute Group Co.， Ltd.， 430063， Wuhan， China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20252100
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中图分类号/CLCN:U231.4
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栏目/Col:土建工程
摘要:
［目的］ 为检验装配式地下车站附属接口框架结构受力性能，提高装配式地下车站装配率，需对装配式地下车站附属接口框架结构力学性能进行研究。 ［方法］ 对装配式地下车站附属接口框架节点进行1∶2缩尺试验，采用Abaqus有限元模型进行验证性分析。 ［结果及结论］加载过程中出入口框架型钢混凝土梁在梁端产生斜裂缝，斜裂缝的发展降低了混凝土对顶部钢筋的约束，造成钢筋末端出现粘结开裂破坏，影响试件的最终承载力；加载过程中，接口框架结构与主体结构之间的内力传递始终可靠；所建立的Abaqus有限元模型能准确反映试件承载力、变形特征及裂缝发展规律，适用于后续研究。装配式地下车站附属接口框架结构力学性能研究，对提高地下车站装配率、缩短施工工期、提升劳动生产效率、促进建筑产业转型升级具有积极作用。
Abstracts:
［Objective］ To evaluate the mechanical behaviors of auxiliary interface framework structures in prefabricated underground station and improve the assembly rate of such stations， it is necessary to conduct research on the mechanical performance of above-mentioned framework structures. ［Method］ A 1：2 scaled experimental test is carried out on the joints of previously mentioned frameworks. A validation analysis is conducted using Abaqus finite element model. ［Result Conclusion］ During the loading process， diagonal cracks appeared at the ends of steel-concrete beams in entrance/exit frameworks. The development of these diagonal cracks weakened the concrete confinement of the top reinforcement， leading to bond failure and cracking at the reinforcement ends， this affects the ultimate bearing capacity of the specimens. Throughout the loading process， internal force transfer between the interface framework structure and the main structure remains consistently reliable. The established Abaqus finite element model accurately reflects the bearing capacity， deformation characteristics， and crack propagation law of the specimen， therefore is applicable for further research. Studies on the mechanical performance of auxiliary interface framework structures in prefabricated underground stations contribute to improving the assembly rate of underground stations， shortening construction periods， enhancing labor productivity， and promoting the transformation and upgrade of the construction industry.
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