摘要
预埋件、植筋和化学锚栓是土木工程中常用的三种锚固技术。为了对这三种连接锚固筋的受剪性能进行研究,制作了30个预埋件、植筋及化学锚栓单锚试件进行受剪试验,得到不同工况下的受剪承载力、荷载-锚板位移曲线及荷载-锚筋拔出位移曲线。试验结果表明:试件破坏均为钢材破坏,总体变形量较小,具有脆性破坏特征;荷载-锚板位移曲线初始表现为线弹性增长,后期有一定的塑性变形;试验过程中,锚筋处于拉、弯、剪复合受力状态;植筋受剪承载力介于预埋件与化学锚栓之间,其作为锚固连接件的受剪性能良好。以试验结果为基础,提出了适用于三种连接锚固筋的受剪承载力计算公式。
Concrete embedded parts, post-install rebar and adhesive anchor are three anchorage technologies commonly used in civil engineering. In order to study the shear behavior of these three anchorage technologies, 30 specimens were tested with shear loading. The failure load, load-displacement curves of steel plate and load-pullout displacement curves of anchor bar were obtained and compared. The results indicate that the failure mods of all specimens are shear failure and the displacement is little which means brittle failure. The load-displacement curves of steel plate can be divided into two stages: the elastic stage and plastic stage. During the test, the anchor bar is in combined flexure, shear and tensile stress state. The shear capacity of post-install rebar is between that of the concrete embedded parts and adhesive anchor, which means the post-install rebar has good mechanical properties and can be used as shear connector. Based on the experimental results, a calculation method for estimating the shearing capacity of these connections is proposed.
作者
刘羽纶
徐福泉
谢剑
熊朝晖
LIU Yulun;XU Fuquan;XIE Jian;XIONG Zhaohui(School of Civil Engineering,Tianjin University,Tianjin 300350,China;China Academy of Building Research Technology Co.,Ltd,Beijing 100013,China;Hilti( Shanghai) Ltd,Shanghai 201108,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2018年第S2期374-379,共6页
Journal of Building Structures
基金
国家重点研发计划(2016YFC0701800)
关键词
钢筋锚固
预埋件
植筋
化学锚栓
静力试验
受剪承载力
anchor bar
concrete embedded parts
post-install rebar
adhesive anchor
static test
shearing capacity
