(1 吉林建筑大学土木工程学院， 长春 130018； 2 中建八局发展建设有限公司， 青岛 266100)

摘要: 新型环氧树脂混凝土装配式桁架结构由新型环氧树脂混凝土材料制作而成。 选取新型环氧树脂混凝土桁架结构中具有代表性的上弦 K 型节点为研究对象，采用数字图像相关法进行全程试验数据及图像采集，研究了桁架结构上弦 K 型节点的破坏形态及极限承载力。 采用 ABAQUS 软件对新型环氧树脂混凝土桁架结构上弦K 型节点进行计算分析，通过与试验研究结果对比，验证了有限元模拟的可行性和有效性。 结果表明，新型环氧树脂混凝土桁架结构上弦 K 型节点在核心区域沿 45°呈“八”字形破坏，右侧腹杆端部表面混凝土剥落，钢筋屈服；上弦 K 型节点核心区域较强，破坏极限承载力达到 579. 6kN。 体现了新型环氧树脂混凝土材料作为结构材料的优势。

关键词: 新型环氧树脂混凝土； 装配式桁架结构； 上弦 K 型节点； 破坏形态； 极限承载力

中图分类号:TU323. 4 文献标志码:A 文章编号:1002￣848X(2022)06￣0038￣06

DOI:10. 19701 / j.jzjg.LS210253

Test and finite element analysis of upper chord K￣type joint of a new epoxy resin concreteprefabricated truss structure

XIE Xinying1， LI Haiwen1， JIN Yujie1， WANG Di2

(1 School of Civil Engineering， Jilin Jianzhu University， Changchun 130018， China； 2 China Construction EighthBureau Development and Construction Co.， Ltd.， Qingdao 266100， China)

Abstract:The new epoxy resin concrete prefabricated truss structure is made of new epoxy resin concrete material. Therepresentative upper chord K￣type joint in the new epoxy resin concrete truss structure was selected as the research object，and the digital image correlation method was used to collect the whole test data and image， and the failure form and ultimatebearing capacity of the upper chord K￣type joint of the truss structure were studied. The ABAQUS software was used tocalculate and analyze the upper chord K￣type joint of the new epoxy resin concrete truss structure， and the feasibility andthe validity of the finite element simulation was verified by comparing with the experimental research results. The resultsshow that the upper chord K￣type joint of the new epoxy resin concrete truss structure is damaged in an " eight" shape along45° in the core area. The surface of the end surface of the right web member is peeled off， and the steel bar yields. Theupper chord K￣type joint has a strong core area. The ultimate failure bearing capacity reaches 579. 6kN， and the result ofthe upper chord K￣type joint meets the specification requirements. The new epoxy concrete material has advantages as astructural material.

Keywords:new epoxy resin concrete； fabricated truss structure； upper chord K￣type joint； destruction form； ultimatebearing capacity

∗吉林省科技厅重大项目(20200403173SF)，国家自然科学基金资助项目(51678274)。

第一作者:谢新颖，博士，副教授，硕士生导师，主要从事于新型环氧树脂混凝土材料力学性能及结构性能研究，Email:xiexinying@ jlju.edu.cn。

[引用本文] 谢新颖，李海文，金玉杰，等. 新型环氧树脂混凝土装配式桁架结构上弦 K 型节点试验及有限元分析[J]. 建筑结构，2022，52(6):38￣43. XIE Xinying，LI Haiwen，JIN Yujie，et al. Test and finite element analysis of upperchord K￣type joint of a new epoxy resin concrete prefabricated truss structure[J]. Building Structure，2022，52(6):38￣43.