装配式站台雨棚抗震性能试验研究  

Seismic Performance of Prefabricated Platform Canopy with Mortise tenon Connection

作　　者：常玉珍[1] 况久毅 CHANG Yuzheng;KUANG Jiuyi(Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《铁道工程学报》2024年第7期69-74,86,共7页Journal of Railway Engineering Society

基　　金：国家青年基金项目(51308443);陕西省自然科学基金项目(2014JM2-5053)。

摘　　要：研究目的:为提高施工速度、降低成本,促进装配式技术在铁路设施建设中的发展和应用,提出基于“榫卯型”节点的装配式站台雨棚结构体系。为研究“榫卯”连接的装配式“Y”形单柱站台雨棚结构的抗震性能,设计并制作单层单跨两榀铺屋面板装配式站台雨棚试件,通过低周反复加载试验分析破坏模式、滞回特性、承载力、延性和耗能能力等抗震性能,并采用有限元软件ABAQUS对试件进行参数分析。研究结论:(1)试件滞回曲线呈现出捏拢效应,表现出剪切滑移特征;(2)试件的极限层间位移角为1/17,试件的位移延性系数大于4.5,表现出良好的变形能力和延性;(3)塑性铰依次出现在扁梁梁端和预制柱柱脚,破坏模式为“梁铰”机制;(4)参数分析表明,随着雨棚柱纵筋配筋率的增加,雨棚的初始刚度、极限承载力和延性均增加,随着扁梁与柱线刚度、雨棚板板高增大,结构初始刚度、极限承载力增大,但结构延性降低;(5)本研究可为装配式站台雨棚在铁路设施施工应用以及工程设计方面提供依据。Research purposes:In order to improve the construction speed,reduce the cost,and promote the development and application of assembly technology in the construction of railway facilities,a prefabricated platform canopy structure system based on"mortise and tenon"joints was proposed,and the seismic performance of the assembled"Y"-shaped single-column platform canopy structure connected by"mortise and tenon"was studied.A single-layer single-span two-bay roof panel assembled platform canopy specimen was designed and fabricated.The failure mode,hysteretic characteristics,bearing capacity,ductility and energy dissipation capacity were analyzed by low-cycle repeated loading test,and the finite element software ABAQUS was used to analyze the parameters of the specimen.Research conclusions:(1)The hysteresis curve of the specimen exhibits pinching effect with shear slip characteristics.(2)The ultimate story drift ratio is 1/17,and the displacement ductility coefficient exceeds 4.5,indicating good deformation ability and ductility.(3)Plastic hinges appear sequentially at the end of the flat beam and the footing of the prefabricated column,the damage mode shows a"beam hinge"mechanism.(4)The parameters analysis indicates as the longitudinal rebar ratio increased,the seismic performance including the initial stiffness,ultimate bearing capacity,and ductility was increased.As the linear stiffness ratio of the flat beam and column increased,the initial structural stiffness and ultimate bearing capacity increased,but the ductility of the structure decreased,the same applied to the height of the plate.(5)The research results can provide the basis for the application and engineering design of the assembled platform canopy in the construction of railway facilities.

关 键 词：装配式站台雨棚 榫卯型节点 拟静力试验 抗震性能 参数分析 

分 类 号：U24[交通运输工程—道路与铁道工程] TU375.3[建筑科学—结构工程]