四筋植筋混凝土结构偏心拉拔性能试验研究  

Experimental Study on the Eccentric Pullout Performance of Four-bar Reinforced Concrete Structures

作　　者：徐宬 唐兴荣[1] XU Cheng;TANG Xingrong(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《江苏海洋大学学报（自然科学版）》2024年第1期107-114,共8页Journal of Jiangsu Ocean University:Natural Science Edition

摘　　要：为了研究多筋植筋混凝土结构的偏心拉拔性能,以偏心距、植筋间距为参数,设计2个四筋植筋混凝土结构轴心拉拔试验和5个四筋植筋混凝土结构偏心拉拔试验,分析偏心距、植筋间距对四筋植筋混凝土结构拉拔受力性能的影响。试验结果表明,所有四筋植筋混凝土结构试件均发生复合破坏。当其他条件相同时,随着偏心距增大,四筋植筋混凝土结构拉拔承载力减小。另外,在试验研究基础上,考虑偏心距、植筋间距、植筋边距、植筋深度的影响,建立了四筋植筋偏心拉拔承载力的计算模型和计算公式,计算值与试验值吻合良好,为四筋植筋混凝土结构的设计计算提供了技术依据。In order to study the eccentric pullout performance of multi-bar reinforced concrete structures,two axial pullout tests of four-bar reinforced concrete structures and five eccentric pullout tests of four-bars reinforced concrete structures were carried out by using the eccentricity distance and the spacing of the reinforcement as parameters,and the effects of the eccentricity distance and the spacing of the reinforcement were analyzed on the pullout bearing performance of the four-bar reinforced concrete structures.The test results showed that composite damage occurred in all the four-bar reinforced concrete specimens.When other conditions were the same,the pull-out capacity of the four-reinforced concrete structure decreased with the increase of the eccentricity distance.In addition,on the basis of the experimental study,the calculation model and calculation formula of the eccentric pull-out load capacity of four-bars reinforced concrete structure were established by considering the effects of eccentricity distance,reinforcement spacing,reinforcement edge distance and reinforcement depth,and the calculated values were in good agreement with the experimental values,which provided a technical basis for the design and calculation of four-bar reinforced concrete structures.

关 键 词：后植筋锚固技术 四筋植筋 偏心拉拔承载力 群锚效应 折减系数 

分 类 号：TU317[建筑科学—结构工程]