Abstract: Presents two dumbbell-type phased yielding dampers, double dumbbell-type damper (SYLZ) and stiffened dumbbell-type damper (JJYLZ), to eliminate the stress concentration and increase the energy dissipation of traditional slits dampers. The phased yielding behavior and the calculation of mechanical properties of the damper are described first. Four specimens are fabricated and their phased yielding mechanisms, failure modes, energy dissipation and shape optimization effects are discussed by quasi-static tests. In addition, the mechanical properties of individual dumbbell-type plates with different parameters are analyzed using numerical simulation. Based on the numerical analysis, the formulae for calculating the mechanical properties of the damper are modified. The results show that both SYLZ and JJYLZ are capable of realizing the expected phased yielding mechanism. Compared with SYLZ, the first yield load capacity, initial stiffness, second yield load capacity and maximum load capacity of JJYLZ are increased by 10.59%, 46.32%, 4.12% and 43.42% for a similar amount of steel consumption. This demonstrates the advantages of JJYLZ in terms of mechanical properties. Under the same configuration, increasing the thickness of the dumbbell-type plate can effectively improve the loading capacity and energy efficiency of the damper. Compared with the rectangular energy-consuming element, the dumbbell-shaped element allows for a more uniform stress distribution. Moreover, the maximum error between the modified calculation formula and the test results of JJYLZ is less than 25%, which shows a high calculation accuracy.