ANALYSES ON STABILITY OF ACCUMULATION OF DEFORMATION IN STRUCTURES BASED ON SECOND-ORDER WORK

Abstract

The strength of some structures and their members may be degraded under large repeated loading such as severe earthquake force. The strength degradation must be avoided as carefully as possible to keep the safety of structures. It has been found due to many studies that the strength degradation closely correlates with the accumulation of deformation. In this study, the accumulation of deformation of the beam-column under constant loads' and the repeated loading is investigated analytically, and the stability of accumulation is judged based on the theorem of the second-order work.