Relative displacement measuring device and relative displacement measuring method

摘要

Provided is a relative displacement measuring device for obtaining the maximum deformation of a multilayer structure at the time of an earthquake and easily checking and judging the damage status of the multilayer structure and its safety even if it is not a specialized engineer. A relative displacement measuring device is installed between at least two measurement points 15a and 15b for measuring deformation due to an external force of a multilayer structure and measures a relative displacement amount between the measurement points 15a and 15b. The base 10 fixed to one of the measurement points, the wire 15 fixed to the other of the two measurement points and stretched between the two measurement points 15a and 15b, and rotatable in a horizontal plane And a rotary gripping portion 13 that holds one end of the wire 15, and when the rotary gripping portion 13 is pulled by the tension from the other measurement point side, The wire 15 is sent irreversibly to one end side. [Selection] Figure 1