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  

Test and finite element analysis of upper chord K-type joint of a new epoxy resin concrete prefabricated truss structure

作　　者：谢新颖[1] 李海文 金玉杰[1] 王迪 XIE Xinying;LI Haiwen;JIN Yujie;WANG Di(School of Civil Engineering,Jilin Jianzhu University,Changchun 130018,China;China Construction Eighth Bureau Development and Construction Co.,Ltd.,Qingdao 266100,China)

机构地区：[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

出　　处：《建筑结构》2022年第6期38-43,共6页Building Structure

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

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。The new epoxy resin concrete prefabricated truss structure is made of new epoxy resin concrete material. The representative 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 ultimate bearing capacity of the upper chord K-type joint of the truss structure were studied. The ABAQUS software was used to calculate and analyze the upper chord K-type joint of the new epoxy resin concrete truss structure, and the feasibility and the validity of the finite element simulation was verified by comparing with the experimental research results. The results show that the upper chord K-type joint of the new epoxy resin concrete truss structure is damaged in an "eight" shape along 45° in the core area. The surface of the end surface of the right web member is peeled off, and the steel bar yields. The upper chord K-type joint has a strong core area. The ultimate failure bearing capacity reaches 579.6 kN, and the result of the upper chord K-type joint meets the specification requirements. The new epoxy concrete material has advantages as a structural material.

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 

分 类 号：TU323.4[建筑科学—结构工程]