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To resolve the problem of the super-long steel structures producing high-temperature stress on the lower concrete roof column section and improve the structure’s seismic performance, in this paper, we introduce a type of composite damped hinge bearing (CDHB). Firstly, this paper introduces the detailed construction of the CDHB and elaborates on its working principle. The mechanical properties of a CDHB have been tested, including the monotonic loading test on the whole bearing and the reciprocal loading test on the built-in dampers. The CDHB’s working performance, rotation performance, and energy consumption performance under tensile and compressive forces are also discussed in this paper. The study results show that: (1) Generally, the vertical deformation of the CDHB increases linearly with the increase of compressive and tensile forces, while it decreases with the increase of initial displacement. (2) Under vertical loading, the CDHB can reach a turning angle of 0.6 rad. The bearing is more likely to rotate with the increase in initial displacement. (3) The ultimate displacement, maximum damping force, damping constant, and damping coefficient of the built-in dampers are all stable.

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