(1.School of Civil Engineering, Southeast Univ, Nanjing, Jiangsu210096, China;2.School of Civil Engineering, Shandong Jianzhu Univ, Jinan, Shandong250101,China) 在知网中查找 在百度中查找 在本站中查找
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Abstract:
To reduce the cost of bar splice, a new type of grouted sleeve was developed with standard seamless steel tube through cold rolling techniques. Based on this sleeve, twelve coupler specimens were prepared and tested under cyclic load as well as incremental tensile load. The structural performance of this novel grouted splice was then studied. The test results showed that the strength and deformation of the splices could satisfy the requirements specified in the JGJ107-2010. Due to the cyclic loads, the ultimate bond strength declined by about ten percent of the specimen strength under direct tension test. Meanwhile, because of the confinement provided by the sleeve, the residual bond strength of the bond failed specimen is greater than 50 percent of the ultimate tensile strength. Moreover, it is found that the number of the concentric ribs at each side of the sleeve should not be less than three, and it should be increased properly for the improvement of tensile capacity requirement of the splice.