- 摘 要
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季 韜 (福州大學(xué)土建學(xué)院 350002)錢在茲 莊一舟 (浙江大學(xué)土木系 杭州 310027)[提要] 在四個(gè)扁梁柱節(jié)點(diǎn)試驗(yàn)的基礎(chǔ)上，研究了鋼纖維鋼筋混凝土節(jié)點(diǎn)內(nèi)鋼筋應(yīng)變的變化規(guī)律，分析了節(jié)點(diǎn)內(nèi)、外核心區(qū)的混凝土、剪力筋和鋼纖維對(duì)扁梁柱節(jié)點(diǎn)極限抗剪承載能力的貢獻(xiàn)，提出了節(jié)點(diǎn)極限抗剪承載力的計(jì)算公式及截面限制條件，并給出了節(jié)點(diǎn)的兩種破壞形態(tài)的判別方法。計(jì)算結(jié)果與試驗(yàn)情況符合良好。提出的計(jì)算公式可供工程設(shè)計(jì)參考使用。
[關(guān)鍵詞] 扁梁柱節(jié)點(diǎn) 鋼纖維 核心區(qū) 抗剪承載力Based on the experiments of four flab beam-column joints,this paper studied the rule about the strains of the steel bars in the steel fiber reinforced concrete flab beam-column joints, analyzed the attnbution of the concrete, the shear steel har and the steel fiber in exterior and interior joint cores to the ultimate shear resistant capacity of flab beam-column joints, and proposed a calculation equation of the ultimate shear resistant capacity of the steel fiber reinforced concrete flab beam-column joints and an equation defining the minimal section dimension of the joints. A way discriminatinfl; two kinds of failure models was also given. The results of calculation correspond to the case of test. These equations proposed can be a reference in engineering design.
Keywords: flab beam-column joint; steel fiber; joint core; shear resistant capacity
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