考虑钢筋偏心影响的新型灌浆套筒力学性能  

Mechanical Properties of New Type Grouting Sleeves Considering Effect of Steel Bar Eccentricity

作　　者：王飞程 赵军 刘佳 陈婧 尹露露 朱银红[1] WANG Feicheng;ZHAO Jun;LIU Jia;CHEN Jing;YIN Lulu;ZHU Yinhong(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,Guangxi,China;School of Architecture and Transportation Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林电子科技大学建筑与交通工程学院,广西桂林541004

出　　处：《济南大学学报（自然科学版）》2022年第5期549-559,共11页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(52068016);广西建筑新能源与节能重点实验室项目(桂科能-J-21-23,桂科能-J-21-25)。

摘　　要：为了研究钢筋偏心对新型灌浆套筒连接件的套筒应力-应变、灌浆料应力-应变、连接件侧向变形等性能参数的影响,在钢筋整体偏心试件的单向拉伸实验基础上,采用基于内聚力接触属性、三维实体单元及显示动力学的有限元软件ABAQUS建模方式,对钢筋整体偏心与局部偏心2种偏心类型共11个新型灌浆套筒偏心试件进行有限元模拟;结合有限元模型与实验结果,验证该建模方式有限元分析的可靠性。结果表明:套筒最大轴向应力、应变与钢筋偏心距呈正相关;钢筋偏心导致套筒试件产生附加弯矩及侧向位移,造成套筒、灌浆料应力-应变分布不均,应力集中现象明显,增加套筒试件侧向失稳的可能性,降低试件的极限承载力;有限元模型模拟结果与实验结果吻合良好。To research effect of steel bar eccentricity on performance parameters of new type grouting sleeve connectors, such as stress and strain of sleeves, stress and strain of grouting, and lateral deformation of connectors, on the basis of uniaxial tensile test of steel bar global eccentric specimens, a total of 11 new type grouting sleeve eccentric specimens with 2 types of steel bar global eccentricity and local eccentricity were simulated by using finite element software ABAQUS modeling method based on cohesive force contact attributes, three-dimensional solid elements, and display dynamics. The finite element model and experimental results were combined to verify reliability of finite element analysis of the modeling method. The results show that the maximum axial stress and strain of sleeves are positively related to the steel bar eccentricity. The steel bar eccentricity can cause additional bending moment and lateral displacement of sleeve specimens, resulting in uneven stress and strain distribution of sleeves and grouting materials, as well as obvious stress concentration. The possibility of lateral instability of sleeve specimens is increased and the ultimate bearing capacity of specimen is reduced. The simulating results of the finite element model are in good agreement with the experimental results.

关 键 词：装配式建筑 灌浆套筒 力学性能 有限元分析 

分 类 号：TU375[建筑科学—结构工程]