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          華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (12): 108-113 DOI10.13245/j.hust.201219

          欄目:土木工程
          高強不銹鋼絞線與ECC黏結滑移性能研究
          王新玲 a , 趙要康 a , 周擎威 b , 朱俊濤 a
          a. 鄭州大學土木工程學院,河南 鄭州 450001
          b. 杭州融浩置業有限公司,浙江 杭州 311215
          摘要 為了研究高強不銹鋼絞線與水泥基復合材料(ECC)間的黏結滑移性能,以ECC抗拉強度、鋼絞線公稱直徑和相對錨固長度等為試驗參數,通過高強不銹鋼絞線在ECC立方體中的拉拔試驗,研究二者的黏結性能.試驗結果表明當ECC保護層足夠大時,主要發生鋼絞線的滑移和拉斷兩種破壞模式.對于發生鋼絞線滑移的試件,隨著相對錨固長度和鋼絞線公稱直徑的增大,其峰值拉拔荷載增大,但是二者平均黏結應力減??;隨著ECC抗拉強度的增大,其峰值拉拔荷載和平均黏結應力均增大,說明ECC抗拉強度對二者的黏結性能影響最大.基于改進的BPE模型,建立了高強不銹鋼絞線與ECC的黏結-滑移關系模型,提出了模型參數中峰值黏結應力和滑移量等表達式.經驗證分析,所提模型及模型參數計算公式與試驗結果符合良好,能較好地反映二者的黏結滑移特征.
          關鍵詞 高強不銹鋼絞線 ;水泥基復合材料(ECC) ;黏結滑移關系模型 ;黏結性能 ;拉拔試驗
          Study on bond-slip property of high strength stainless steel strand and ECC
          WANG Xinling a , ZHAO Yaokang a , ZHOU Qingwei b , ZHU Juntao a
          a. School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China
          b. Hangzhou Ronghao Real Estate Co. Ltd.,Hangzhou 311215,China
          Abstract In order to investigate the bond-slip property of high-strength stainless steel strand in engineered cementitious composites (ECC),three parameters of ECC tensile strength,steel strand diameter and relative anchorage length were considered,and the bond property of the two was studied by the pull-out test of high-strength stainless steel strand in ECC cubes.The test results show that two failure modes,namely steel strand slip and steel strand break,will occur when the ECC protection layer is large enough.For specimens with steel strand slippage,the peak drawing load increased with the increase of relative anchorage length and nominal diameter of steel strand,while the average bonding stress decreased.With the increase of the tensile strength of ECC,the peak drawing load and average bonding stress were all increased,indicating that the tensile strength of ECC has the greatest influence on the bond property of the two.Based on the test results,the bond failure characteristics and bond-slip mechanism of steel strand in ECC were analyzed.According to the improved BPE model,the bond-slip relationship model between steel strand and ECC was established.The expressions of peak bond stress and slip in the model parameters were proposed. Through verification and analysis,the proposed model and model parameters calculation formulas agree well with the experimental results and can better reflect the bond-slip characteristic of the interface between steel strand mesh and ECC.
          Keywords high strength stainless steel strand ; engineered cementitious composites (ECC) ; bond-slip relationship model ; bond property ; pull-out test
          基金資助國家自然科學基金資助項目(51708511,51879243);國家自然科學基金-河南聯合基金資助項目(U1804137)

          中圖分類號TU528.58
          文獻標志碼A
          文章編號1671-4512(2020)12-0108-06
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          文獻來源
          王新玲, 趙要康, 周擎威, 朱俊濤. 高強不銹鋼絞線與ECC黏結滑移性能研究[J]. 華中科技大學學報(自然科學版), 2020, 48(12): 108-113
          DOI:10.13245/j.hust.201219
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