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浙江大学学报(工学版)  2017, Vol. 51 Issue (8): 1537-1543    DOI: 10.3785/j.issn.1008-973X.2017.08.008
土木与交通工程     
开孔板连接件剩余承载力计算模型及试验验证
汪炳, 黄侨, 邹韵, 李文贤
东南大学 交通学院, 江苏 南京 210096
Calculation model of residual bearing capacity for Perfobond connector and experimental verification
WANG Bing, HUANG Qiao, ZOU Yun, LI Wen-xian
School of Transportation, Southeast University, Nanjing 210096, China
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摘要:

为了研究组合结构桥梁中开孔板连接件在一定疲劳荷载循环次数后抗剪承载力的退化问题,提出基于疲劳累积损伤效应的开孔板连接件剩余承载力计算方法.采用弹性地基梁法分析开孔板连接件在线弹性阶段的受力特征,得出在给定疲劳荷载幅值下贯穿钢筋和混凝土榫的应力幅值;参考已有文献中混凝土与钢筋的疲劳寿命模型计算出各自的疲劳寿命,得到两者在一定疲劳循环次数后的损伤;根据贯穿钢筋和混凝土榫对整体承载力的贡献比例,计入相应的损伤度,推导出开孔板连接件疲劳后的剩余承载力计算模型.通过开孔板连接件剩余承载力的推出试验结果进行验证.结果表明:提出的模型的计算结果不仅与试验结果吻合良好,且偏于安全.

Abstract:

A residual bearing capacity calculation model of Perfobond connector based on the fatigue cumulative damage effect was propased in order to analyze the degradation issues of shear capacity of Perfobond connectors after a certain number of fatigue loading in composite bridges. The mechanical characteristics of Perfobond connector in the linear elastic stage was analyzed by elastic foundation beam method. The stress amplitudes of transverse rebar and the concrete in the hole were calculated at a given fatigue load amplitude. The fatigue life of steel and concrete was obtained with reference to their models in the existing literature, respectively. The damage of the two materials was calculated under a certain number of fatigue loads. A residual bearing capacity calculation model for Perfobond connector was deduced according to the contribution proportion of steel and concrete for the whole bearing capacity and considering the corresponding damage degree. It was verified by the results of the residual bearing capacity push-out tests for the Perfobond connectors. Results showed that the calculated values of the proposed model accorded well with the experimental results, and was considerably conservative.

收稿日期: 2016-07-22 出版日期: 2017-08-16
CLC:  U448  
基金资助:

国家自然科学基金资助项目(51278119,51078078).

通讯作者: 黄侨,男,教授.ORCID:0000-0003-1167-3588.     E-mail: qhuanghit@126.com
作者简介: 汪炳(1986-),男,博士生,从事抗剪连接件剩余力学性能等研究.ORCID:0000-0003-4290-5417.E-mail:wangbing050114@163.com
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引用本文:

汪炳, 黄侨, 邹韵, 李文贤. 开孔板连接件剩余承载力计算模型及试验验证[J]. 浙江大学学报(工学版), 2017, 51(8): 1537-1543.

WANG Bing, HUANG Qiao, ZOU Yun, LI Wen-xian. Calculation model of residual bearing capacity for Perfobond connector and experimental verification. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1537-1543.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.08.008        http://www.zjujournals.com/eng/CN/Y2017/V51/I8/1537

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