Abstract
In this paper, the uniaxial tensile tests of semi grouted sleeve connectors at normal temperature, 200 ℃, 300 ℃, 400 ℃ and 600 ℃ were carried out. The influence of temperature and anchorage length on the tensile properties of semi grouted sleeve connectors after high temperature was studied, and the transition process of failure mode of connection with the increasing of temperature was analyzed. The results showed that with the increasing of temperature, the failure mode of the grouted sleeve connectors changed from tension failure after steel bar yield to the pull-out failure after steel bar yield, and finally to pull-out failure before steel bar yield. The ultimate bearing capacity of the semi grouted sleeve connector decreased with the increasing of temperature. When the temperature was lower than 400 ℃, the best anchorage length of the specimen was 110 mm. The temperature was higher than 400 ℃(including 400 ℃), increasing the anchorage length can effectively increase the ultimate bearing capacity of the specimen. Finally, based on the test results, the calculation formula of the ultimate tensile force of the semi grouted sleeve connectors with the change of temperature and anchorage length was given, which provides a reference for related specification design and engineering construction.
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