摘要
为研究新型装配式剪力墙中集中配束钢筋的黏结锚固性能,分别以灌浆料种类和钢筋锚固长度为试验参数,设计并制作5组共15个试件进行拉拔试验,分析试件的破坏特征和钢筋与试件之间的荷载滑移,对比不同灌浆料和不同锚固长度对黏结强度和破坏状态的影响,提出钢筋与试件发生黏结滑移的本构模型并使用有限元软件对建立的本构模型开展分析验证。研究结果表明:在一定的锚固范围内,随应力分布状态的改变,锚固钢筋与试件之间的极限黏结应力先增大后减小;提高灌浆料的强度可以提高锚固钢筋与灌浆料之间的黏结握裹力;本文提出的黏结滑移本构模型和使用的有限元分析方法可以对集中配筋连接中大直径钢筋与灌浆料的黏结滑移行为进行较好地模拟。
In order to study the bonding and anchoring performance of concentrated bunched rebar in a new type of prefabricated shear wall,15 specimens in 5 groups were designed and manufactured with the type of grouting materials and the anchoring length of rebar as test parameters,and pull-out test were conducted to analyze the failure characteristics of the specimens and the load-slip curve between the rebar and the specimens.The effects of different grouting materials and anchorage lengths on the ultimate bearing capacity and failure state of the specimens were compared,and the constitutive model of bond-slip between the rebar and the specimens was proposed and verified by finite element software.The results show that within a certain anchorage range and with the change of stress distribution,the ultimate bearing capacity between the anchored rebar and the specimen first increases and then decreases.Increasing the strength of grout can improve the bonding force between the anchored reinforcement and the grouting materials.The constitutive model of bond-slip and the finite element analysis method used in this paper can simulate the bond-slip behavior of large diameter rebar and grouting materials in the centralized bundling.
作者
罗小勇
周太
陈奇
廖超
LUO Xiaoyong;ZHOU Tai;CHEN Qi;LIAO Chao(School of Civil Engineering,Central South University,Changsha 410075,China;Engineering Technology Research Center for Prefabricated Construction Industrialization of Hunan Province,Changsha 410075,China;Hunan Architectural Design Institute Group Co.Ltd.,Changsha 410012,China)
出处
《中南大学学报(自然科学版)》
北大核心
2025年第3期1026-1038,共13页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(52178179)
中南大学研究生自主探索创新项目(2024ZZTS0748)。
关键词
集中配筋
黏结滑移关系
有限元分析
centralized reinforcement
bond-slip relation
finite element analysis
