Abstract
In this study, a novel type of loading strut device is presented, which is introduced in portal frame external prestressing reinforcement and used to constitute a cable-supported portal frame structural system. The strut device was found to be capable of elongating by rotating the middle screw and applying prestress to the steel strand in the system. In this study, the new loading strut is simulated and analyzed using the ANSYS finite element analysis software. Moreover, it is used for the reinforcement test of a practical project. During the test, the prestress load is applied through the novel strut, and the changes of strain, mid span deflection and prestress of the steel strand at the key positions before and after the reinforcement are investigated. Based on the analysis of the simulation and test results, it is found that this novel type of loading strut is simple, safe and reliable to operate, and could be employed in the cable-supported structure system without tensioning the steel strand to achieve loading.
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