摘要
为研究钢筋插入式波纹管浆锚连接的受力性能,本文采用有限元法对其轴向拉伸作用下的力学行为进行了精细化模拟分析,并与试验结果进行对比,验证了数值模型的有效性。通过设置不同的锚固长度la、灌浆料厚度rg以及钢筋直径ds,分析了多种参数对其锚固性能的影响。结果表明:除锚固长度la=7ds的接头为钢筋拔出破坏外,其余接头皆为钢筋屈服破坏;在受力过程中,波纹管均未屈服,一直处于弹性阶段;灌浆料与混凝土最大应力随rg/ds以及rgla/ds2增大而减小,当rg/ds<0.3,rgla/ds2<3.0时,2种材料最大应力均超过其抗压强度。
To investigate the mechanical properties of the grouting connection of pre-buried bellows with steel bars inserted,the finite-element method is used to conduct a fine simulation analysis of the mechanical behavior under axial tension load.The validity of the numerical model is illustrated by comparison with experimental results.By setting variant anchorage length,l;grouting material thickness,r;and reinforcement diameter,d;various factors influencing the bonding strength are studied.The results show that,apart from the damage due to extraction of the connector with anchorage length equal to seven times the diameter of the rebar,the rebar yield damage occurs in the remaining joints.In the development of stress,the corrugated sleeves do not yield and instead remain in the elastic stage.The maximum stress of the grouting materials and concrete decreases with the increase of r/d and rl/d,and the maximum stress of these two materials exceeds their ultimate compressive strength when r/d is less than 0.3 and rl/d is less than 3.0.
作者
石棚
王浩
柳家为
朱克宏
SHI Peng;WANG Hao;LIU Jiawei;ZHU Kehong(Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China;China Railway 24th Bureau Group Co., Ltd., Shanghai 200070, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2021年第6期810-817,共8页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51578151)
国家“万人计划”青年拔尖人才(W03070080)
江苏省重点研发计划项目(BE2018120).
关键词
预制拼装桥梁
波纹管
浆锚连接
受力性能
有限元
数值分析
参数分析
失效模式
segmental prefabricated bridges
corrugated sleeve
grouted connection
stress performance
finite-element method
numerical analysis
parameter analysis
failure mode
