tons p max 79 4 tons u03b4 y 1 9 mm u03b4 max u2267 140 mm because the difference between u03b4 y and u03b4 max is very large as compared with the difference between p y and p max it can be noted that the elasto plastic damper of the present invention has a remarkably great degree of plastic deformability at that time the resisting moment at the lower end of the damper body in fig2 is m rmax 22 6 tm fig7 shows the hysteresis curves of a single elasto plastic damper from which it can be noted that the individual damper has a considerable degree of energy absorbability fig8 a 8 b and 8 c show an example in which the elasto plastic dampers 1 of the present invention are employed for the respective joints 15 between two buildings 13 14 having different vibration characteristics this damper is hereinafter referred to as joint damper specifically the elasto plastic dampers 1 are disposed at the joints 15 between two structurally separated buildings 13 14 for absorbing vibration energy by utilizing the difference in motion vibration between the two buildings 13 14 this building comprises an eight story house 13 of l shaped plan and a five story house 14 of rectangular shaped plan at the height of 5th story the two houses 13 14 are joined by three joints 15 two at the opposite ends of the l shape and one at the midportion of the l shape a total of twelve elasto plastic dampers 1 are used four for each joint 15 fig9 shows the analysis results of reducing effect of response shear forces.