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(清華大學(xué)土木工程系，結(jié)構(gòu)工程與振動(dòng)教育部重點(diǎn)實(shí)驗(yàn)室，北京 100084)

［摘要］在鋼板-混凝土組合梁及鋼板-混凝土組合抗彎加固梁中，由于栓釘與普通鋼-混凝土組合梁中受力情況不同，其抗剪承載力按照現(xiàn)行規(guī)范的方法計(jì)算偏于不安全。為了研究栓釘連接件在鋼板-混凝土組合梁及組合抗彎加固中的性能，進(jìn)行了8根鋼板-混凝土組合梁及10根鋼板-混凝土組合抗彎加固鋼筋混凝土梁的試驗(yàn)，通過(guò)量測(cè)鋼板沿軸向的應(yīng)變間接得到栓釘在梁中的性能。通過(guò)分析栓釘在鋼板-混凝土組合梁及組合抗彎加固中的受力情況，給出了栓釘抗剪承載力的計(jì)算方法，采用該方法得到的結(jié)果與試驗(yàn)結(jié)果吻合較好。

［關(guān)鍵詞］鋼板-混凝土組合梁;組合抗彎加固;栓釘;抗剪承載力

Shear resistance of stud shear connectors in steel plate-concrete composite beams and RC beams flexurally strengthened using steel plate-concrete composite technique

Nie Jianguo, Zhao Jie(Department of Civil Engineering, Key Laboratory of Structural Engineering andVibration of China Education Ministry, Tsinghua University, Beijing 100084, China)

Abstract:The states of stress and ultimate shear resistance of stud shear connectors in steel plate-concrete composite (SPCC) beams and RC beams flexurally strengthened using SPCC technique were different from the studs in traditional steel-concrete composite beams in hogging moment region, so the design rules in current standards can not be used in SPCC beams. Eight large-scale SPCC beams and ten RC beams flexurally strengthened using SPCC technique were tested. The axial strains of steel plate were measured in order to obtain the real behavior of studs in SPCC beams. The ultimate shear strength of studs is suggested according to test results. A design model is proposed based on the analysis of the state of stress of steel plate in SPCC beams. And the design method is verified by the test results.

Keywords:steel plate-concrete composite beams; strengthened using steel plate-concrete composite technique; stud shear connectors; shear resistance

*國(guó)家自然科學(xué)基金資助項(xiàng)目(50578084)，鐵道部科技研究開(kāi)發(fā)計(jì)劃資助項(xiàng)目(2006G029)。

作者簡(jiǎn)介：聶建國(guó)（1958-），男（漢），湖南人，教授，Email: niejig@tsinghua.edu.cn。

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