|
| Symbol | Definition | Unit |
|
| M | The isolated structural mass | ton |
| C | The damping constant of viscous damper | kN·s/m |
| K | The spring constant of vertical spring | kN/m |
| The length of spring with zero stress | m |
| The initial length of spring in Figure 1 | m |
| The spring force | kN |
| The horizontal component of spring force | kN |
| The vertical component of spring force | kN |
| The horizontal secant constant of spring | kN/m |
| The friction coefficient at any position | — |
| The central friction coefficient of concave friction distribution | — |
| R | The friction coefficient increment of unit length | m−1 |
| The reduced factor based on r in equation (9) | m−1 |
| The horizontal friction force | kN |
| The static friction force | kN |
| The absolute acceleration of ground | m/s2 |
| The absolute velocity of ground | m/s |
| The absolute displacement of ground | m |
| The absolute acceleration of structure | m/s2 |
| The absolute velocity of structure | m/s |
| The absolute displacement of structure | m |
| The relative displacement between the structure and the ground, | m |
| The time of ground motion input | s |
| The time interval of ground motion input, | s |
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