- 摘 要
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(中鐵建重慶投資集團有限公司, 重慶 400700)
摘要: 為研究現(xiàn)有兩種帶鋼接頭的裝配式鋼筋混凝土梁抗剪性能,設(shè)計制作了 6 個鋼筋混凝土梁試件進行足尺試驗研究,其中包括 4 個帶鋼接頭的鋼筋混凝土梁和 2 個用于對比的普通鋼筋混凝土梁. 通過記錄各試件的試驗現(xiàn)象及破壞形態(tài),測量各試件的抗剪承載力、位移和應(yīng)變等參數(shù),對試件的抗剪性能與剪切延性進行分析. 結(jié)果表明:與普通鋼筋混凝土梁相比,使用鋼接頭且下部設(shè)置受拉鋼板、無縱向受力鋼筋的試件極限抗剪承載力有所降低,下部設(shè)置縱向受力鋼筋的試件極限抗剪承載力提高 18. 5% ~ 24. 5%,剪切延性均有所提高. 通過對目前各國現(xiàn)行鋼筋混凝土梁抗剪承載力計算方法的適用性評價發(fā)現(xiàn),我國現(xiàn)行規(guī)范可較好地預(yù)測帶鋼接頭的裝配式鋼筋混凝土梁的抗剪承載力.
關(guān)鍵詞: 裝配式鋼筋混凝土梁; 鋼接頭; 抗剪性能; 剪切延性
中圖分類號:TU375+. 1 文獻標(biāo)志碼:A 文章編號:1002-848X(2023)09-0115-08
DOI:10. 19701 / j. jzjg. LS220343
Study on shear behavior of prefabricated reinforced concrete beams with steel joints
LU Hui
(China Railway Construction Chongqing Investment Group Co. , Ltd. , Chongqing 400700, China)
Abstract: In order to explore the shear behavior of the existing two types of prefabricated reinforced concrete beams withsteel joints, six specimens of reinforced concrete beams were designed and manufactured for full scale test study, includingfour reinforced concrete beams with steel joints and two ordinary reinforced concrete beams for comparison. By recording thetest phenomenon and failure pattern of each specimen, and measuring the shear bearing capacity, displacement and strainparameters of each specimen, the shear behavior and shear ductility of the specimen were analyzed. The results show thatcompared with ordinary reinforced concrete beams, the ultimate shear bearing capacity of the specimens with steel joints,tensile steel plates and no longitudinal reinforcement is reduced, the ultimate shear bearing capacity of specimens withlongitudinal reinforcement is increased by 18. 5% ~ 24. 5%, and the shear ductility of specimens using steel joints isimproved. Through the applicability evaluation of the current calculation method of shear bearing capacity of reinforcedconcrete beams in various countries, it is found that China's specifications can better predict the shear bearing capacity ofprefabricated reinforced concrete beams with steel joints.
Keywords:prefabricated reinforced concrete beam; steel joint; shear behavior; shear ductility
∗遼寧省應(yīng)用基礎(chǔ)研究計劃 (2022JH2 / 101300130).
作者簡介:路輝,學(xué)士,高級工程師,主要從事土木工程領(lǐng)域施工技術(shù)研究,Email: 125897349@ qq. com.
[引用本文] 路輝. 帶鋼接頭的裝配式鋼筋混凝土梁抗剪性能研究[ J]. 建筑結(jié)構(gòu),2023,53(9):115-122. LU Hui.Study on shear behavior of prefabricated reinforced concrete beams with steel joints[ J]. Building Structure,2023,53(9):115-122.
