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 oc-curred 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 spac-ing,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 cal-culation 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
Key words
post implant anchoring technology/four bars/eccentric pullout capacity/group an-chor effect/reduction coefficient
维普
万方数据