| 摘要 |
A system for limiting the movement of a pipe (12) due to a seismic event is disclosed, including an energy absorbing device for restraining the pipe (12) in the event of the seismic event, and a clamp (19) adapted to be attached about the pipe (12) at a point where the anticipated unrestrained movement due to a seismic event is greater than the anticipated thermal novement of the pipe. The energy absorbing device (21) is connected at one of its ends to the clamp (19) and the opposite end of the energy absorbing device (21) is adapted to be connected to a substantially immovable support structure or wall (15). The device (21) includes a first elongated member (28) having a hollow portion therein and a second member (34) mounted within the hollow portion of the first member (28). One of the first and second members (28-34) has its front end fixedly connected to the clamp (19) and the other one of the members has its rear end adapted to be connected fixedly to the support structure (15). The first member (28) includes a first interference device (40, 42) so that as the first (28) and second (34) members move longitudinally relative to one another, the first and second interference devices (48, 50, 40, 42) engage one another forcibly and thereafter the first (28) and second (34) members continue relative movement for load and displacement limiting purpose until they come to rest. |
