When dampers are installed to a bridge, the damping force must be smaller than the resistance of the structure to be installed. However the resistance of the structure might be different between to the pushed force and to the pulled force, for example the abut with earth pressure, and the damping capacity must be chosen appropriate to the smaller resistance. Therefore, the asymmetric friction slip damper of which damping capacities are different between compression and tension was developed. In this study, the indispensable conditions of the asymmetric damper were clarified, and performance tests using actual dampers were carried out. As the results, seismic performance of the asymmetric damper can be estimated similar to the performance of the symmetric damper.
