Validation of Pulse Techniques for the Simulation of Earthquake Motions in Civil Structures

摘要

Results are presented of research undertaken to validate the application of pulse techniques for the simulation of earthquake motions in civil structures. A pulse train algorithm was developed and is shown to closely approximate structural motions induced by earthquakes. A simple anti-earthquake algorithm was also developed. This algorithm, when used in conjunction with various types of pulse units, shows promise in the reduction of structural motions at the damage or life-threatening thresholds. The anti-earthquake algorithm is presently limited to preselected fixed amplitude pulses. Two gas pulse generating systems were produced and are said to be in a state of operational readiness. It is suggested that additional calibration tests at low to medium nozzle throat settings be conducted. In addition, surge suppressors should be added to the plenum chambers to improve nozzle efficiencies and to reduce the interaction of pneumatic surges with the plenum chamber balancing piston.