Experimental simulation of degrading structures through active control

Abstract

In experimental studies of structural behaviour, it is often desirable, even necessary, to perform tests on a test structure from its undamaged state, through its damaged states, and finally to failure. The fact that experiments of this type are not often done primarily because of its prohibitive cost. In this paper, a testing procedure is proposed in which a test structure is allowed to undergo its degradation in real time yet it is not physically damaged, thus allowing it to be reused. The underlying concept is that of active structural control. Considerable research and development of active structural control in civil engineering has taken place relative to responsive control of structures against damaging environmental loads. While the use of active control systems to simulate damage in an experimental setting as proposed in this paper appears to be new, much of the existing knowledge base in active structural control is directly applicable. © 1998 John Wiley & Sons, Ltd.