摘要
以连接件设置为参数,对管幕预筑结构构件的受弯性能进行试验研究,通过观察试件的裂缝发展及破坏形态,量测试件的荷载、挠度、应变,研究管幕预筑结构的受力机理,分析连接件的设置对管幕预筑结构构件受弯性能的影响。试验结果表明:管幕预筑结构受弯构件与等截面双钢板混凝土受弯构件的破坏过程及受力机理有较大差别,其破坏一般出现在钢管与平钢板相交的位置,源于钢管幕在弧形钢管与平钢板相交的凹角处有被拉平的趋势,破坏始于对拉筋及立柱的屈服,终于钢管幕与混凝土完全分离后钢板的屈服;设置对拉钢筋连接件可大幅度提升管幕预筑结构受弯构件的力学性能。
Taking the setting of connectors as parameters,an experimental study on the flexural performance of pipe curtain prefabricated structural members was conducted in this paper.The crack development and failure mode of specimens were observed,and the load,deflection and strain of the specimens were measured.Based on the test results,the stress mechanism of tubular roof prefabricated(TRP) structures was studied,and the influence of connectors on the flexural performance of TRP structural members was analyzed.The results show that the failure process and stress mechanism of flexural members in the TRP structures are quite different from that of the equal section double steel plate concrete flexural members.The failure of flexural members in the TRP structures generally occurs at the intersection of steel pipe curtains and steel plates,which is due to the tendency of the steel plate part to be pulled outward by arc steel pipe part in the steel pipe curtain.The failure starts from the yielding of transverse reinforcement,and ends at the yielding of steel pipe curtain after it is completely separated from the concrete.The setting of bi-steels can improve the mechanical properties of flexural members of TRP structures.
作者
张艳青
吕宇宣
韩石
尤龙飞
曾俊
侯飞阳
ZHANG Yan-qing;LYU Yu-xuan;HAN Shi;YOU Long-fei;ZENG Jun;HOU Fei-yang(Key Laboratory of Roads and Railway Engineering Safety Control(Shijiazhuang Tiedao University),Ministry of Education,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Architecture and Water Conservancy Engineering,Bingtuan Xingxin Vocational and Technical College,Tiemenguan 841007,China)
出处
《吉林大学学报(工学版)》
EI
CAS
CSCD
北大核心
2023年第5期1390-1399,共10页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金青年科学基金项目(52008271)
河北省大学生创新创业项目(S202010107080)。
关键词
地下工程
管幕预筑结构
受弯性能
连接件
承载力
underground1 engineering
tubular roof prefabricated structure
flexural performance
connector
bearing capacity