- 摘 要
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(1 蘭州理工大學(xué)土木工程學(xué)院 730050；2 甘肅土木工程科學(xué)研究院 蘭州 730030)
【提要】 通過在混凝土中植筋的拉拔試驗，研究了不同條件下植筋的破壞形態(tài)，分析了混凝土強度、鋼筋直徑和鋼筋的強度等級對植筋深度的影響。給出了粘結(jié)破壞、錐形破壞、鋼筋屈服和應(yīng)力傳遞破壞等四種破壞形態(tài)的計算模型和相應(yīng)的植筋深度計算公式，并通過多組試驗證明了計算公式的正確性。研究成果可為加固工程設(shè)計中的植筋提供理論指導(dǎo)，也可為有關(guān)加固規(guī)程的修訂提供依據(jù)。
【關(guān)鍵詞】 植筋深度 拉拔試驗 破壞形態(tài) 計算公式 植筋強度
Analysis and Test Investigation of Depth Embedded Steel Bars/Zhu Yanpeng1, Liu Hui1, Wang Xiuli1，Zheng Jianjun2(1 School of Civil Engineering，Lanzhou University of Technology, Lanzhou 730050，China; 2 Gansu Institute of Civil Engineering, Lanzhou 730030, China)
Abstract:Through the pull\|out tests of embedded steel bars, the failure forms of embedded steel bars are investigated.The influence of the strength of embedded steel bars, concrete strength and the diameter of steel bar is analyzed for the depth of embedded steel bars. According to the analysis of the test results, four failure forms of the cohesion, conical contour, steel bar yielding and stress transmitting of embedded steel bars are given, and the corresponding formulas are derived. The formula correctness is proved through the pull\|out test of embedded steel bars. This results can offer the theoretical guidance for the application and the project design of embedded steel bars and it can supply the basis for the modification of the national code.
Keywords:depth embedded steel bars；pull\|out test；failure form；calculating formulas；strength embedded steel bars
