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

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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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.

 CLC: U448

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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.

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