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(1 河北化工醫(yī)藥職業(yè)技術(shù)學(xué)院, 石家莊 050030; 2 華北理工大學(xué)建筑工程學(xué)院, 唐山 063210;3 河北工業(yè)大學(xué)土木與交通學(xué)院, 天津 300401)
摘要: 為研究鋼筋偏心(垂直偏心和斜向偏心)對鑄造半灌漿套筒連接性能的影響,設(shè)計制作了 18 個鑄造半灌漿套筒連接試件,通過拉伸試驗研究鋼筋偏心對試件破壞形態(tài)、強(qiáng)度與變形性能、灌漿料損傷程度的影響. 結(jié)果表明,鋼筋垂直偏心和斜向偏心對接頭極限承載力影響較小,主要影響接頭的變形性能,且出漿口所在截面為最危險截面;鋼筋垂直偏心使貼近鋼筋一側(cè)筒壁應(yīng)變大于另一側(cè)對稱位置應(yīng)變,且鋼筋斜向偏心試件具有相同的應(yīng)變分布規(guī)律;鋼筋居中試件灌漿料損傷深度最小,斜向偏心試件損傷深度最大,垂直偏心試件次之. 最后,建立了鑄造半灌漿套筒連接接頭極限承載力分析模型,接頭極限承載力計算結(jié)果與試驗結(jié)果吻合良好,誤差小于 10%.
關(guān)鍵詞: 鋼筋偏心; 鑄造半灌漿套筒; 損傷深度; 單向拉伸; 連接接頭; 極限承載力; 分析模型
中圖分類號:TU758. 14 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2023)08-0078-08
DOI:10. 19701 / j. jzjg. LS220066
Experimental study on connection performance of cast semi-grouted sleeve considering influence of rebar eccentricity
SU Lipo1, WANG Zhanwen2, LIU Ziye2, CHE Wenpeng3
(1 Hebei College of Chemical and Pharmaceutical Technology, Shijiazhuang 050030, China;2 College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, China;3 School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China)
Abstract: In order to study the influence of rebar eccentricity ( vertical eccentricity and oblique eccentricity) on theconnection performance of cast semi-grouting sleeve, 18 cast semi-grouting sleeve connection specimens were designed andfabricated, and the influence of rebar eccentricity on the failure modes, strength and deformation properties, damage degreeof grout were studied by tensile test. The results show that the vertical eccentricity and oblique eccentricity of the rebar havelittle influence on the ultimate bearing capacity of the splices, which mainly affect the deformation performance of thesplices, and the section where the slurry outlet located is the most dangerous section. The vertical eccentricity of the rebarmakes the strain of the cylinder wall close to the rebar larger than that of the symmetrical position on the other side, and therebar oblique eccentric specimens have the same strain distribution law; The damage depth of grout of rebar centeredspecimen is the smallest, that of oblique eccentric specimen is the largest, and that of vertical eccentric specimen is thesecond. Finally the analytical model was established to predict the ultimate bearing capacity of cast semi-grouted sleeveconnection splices. The calculated results of the splices are in good agreement with the experimental results, and the erroris less than 10%.
Keywords:rebar eccentricity; cast semi-grouted sleeve; damage depth; uniaxial tensile; connection splices; ultimatebearing capacity; analytical mode
∗國家自然科學(xué)基金項目(51678236),河北省自然科學(xué)基金項目(E2020209056).
第一作者:蘇立坡,碩士,高級工程師,主要從事工程結(jié)構(gòu)等研究,Email: liposu2021@ 163. com.
[引用本文] 蘇立坡,王占文,劉子業(yè),等. 考慮鋼筋偏心影響的鑄造半灌漿套筒連接性能試驗研究[ J]. 建筑結(jié)構(gòu),2023,53(8):78-85. SU Lipo,WANG Zhanwen,LIU Ziye,et al. Experimental study on connection performance of castsemi-grouted sleeve considering influence of rebar eccentricity[J]. Building Structure,2023,53(8):78-85.
