Stochastic Earthquakr Response of Column over Designed Structures

Abstract eng:
The column over-design factor is generally used in structural design to prevent plastification of columns. This study performs the stochastic dynamic analysis to evaluate the effect of COF on the mean and deviation of maximum responses of structures subjected to earthquake load. The distributions of peak response of story drift, beam rotation angle, and ductility ratio along the height of the structure are investigated. By conducting random vibration analysis of structures with infinitely strong columns, the COF requirements ensuring elastic column behavior are also evaluated. It is shown that a COF much larger than that addressed by present code is needed for ensuring completely elastic behavior of columns.

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