钢板_溷凝土组合梁及组合抗弯加固中栓钉的性能及抗剪承载力研究.pdfVIP

第 40 卷 第 6 期 建 　筑 　结 　构 2010 年 6 月 钢板混凝土组合梁及组合抗弯加固中栓钉 的性能及抗剪承载力研究 聂建国 , 　赵 　洁 (清华大学土木工程系 ,结构工程与振动教育部重点实验室 ,北京 100084) [摘要] 　在钢板混凝土组合梁及钢板混凝土组合抗弯加固梁中 , 由于栓钉与普通钢混凝土组合梁中受力情况不 同 ,其抗剪承载力按照现行规范的方法计算偏于不安全 。为了研究栓钉连接件在钢板混凝土组合梁及组合抗弯加 固中的性能 ,进行了8 根钢板混凝土组合梁及 10 根钢板混凝土组合抗弯加固钢筋混凝土梁的试验 ,通过量测钢板 沿轴向的应变间接得到栓钉在梁中的性能 。通过分析栓钉在钢板混凝土组合梁及组合抗弯加固中的受力情况 ,给 出了栓钉抗剪承载力的计算方法 ,采用该方法得到的结果与试验结果吻合较好 。 [ 关键词] 　钢板混凝土组合梁 ; 组合抗弯加固; 栓钉 ; 抗剪承载力 Shear resistance of stud shear connectors in steel plateconcrete composite beams and RC beams flexurally strengthened using steel plateconcrete composite technique Nie Jianguo , Zhao Jie (Department of Civil Engineering , Key Laboratory of Structural Engineering and Vibration of China Education Ministry , Tsinghua University , Beijing 100084 , China) Abstract :The states of stress and ultimate shear resistance of stud shear connectors in steel plateconcrete composite ( SPCC) beams and RC beams flexurally strengthened using SPCC technique were different from the studs in traditional steelconcrete 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 t