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| Research on the Fatigue Performance of Lightweight Aggregate Concrete Headed Stud Connectors |
| XU Hai - ying，TANG Xi – biao |
| Bridge Science Research Institute Ltd， China Zhongtie Major Bridge Engineering Group， Wuhan， Hubei 430034，China |
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Abstract Research purposes: At present，the fatigue performance research of lightweight aggregate concrete headed stud connectors is very few At home and abroad. Therefore，designing a set of lightweight aggregate concretes headed stud connectors push - out specimens， and fatigue tests are carried out. By fitting experimental data processing， the fatigue Ultimate strength， fatigue curve is obtained . Then compared with the related specifications and the gained achievements，to evaluate the fatigue resistance of specimens. The result of research also can provide the basis for the lightweight aggregate concrete on Steel - Concrete Composite Beam of bridge.
Research conclusions :(1) The test results show that the fatigue strength of lightweight aggregate concrete stud connectors guaranteed rate of 50% and 97. 72% is respectively 126. 7，105. 5 MPa. The difference between the results and other related research results on ordinary concrete stud connectors is little， and is higher than the corresponding standard value of the Eurocode 4. (2 ) The fatigue curve and fatigue failure mode with ordinary concrete headed stud connectors are similar，indicating that the lightweight aggregate concrete used in the shear stud connectors is feasible. (3) The research results can be popularized in similar engineering，such as composite beam bridge and so on.
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Received: 28 November 2012
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2013, Vol. 30 
