MODELLING OF ROCKING AND SLIDING EFFECTS IN THE SEISMIC ANALYSIS OF A FREE-STANDING COLUMN
Keywords:FREE-STANDING COLUMNS, ROCKING, SLIDING, FINITE ELEMENT MODELS, SEISMIC ANALYSIS.
A STUDY ON THE SEISMIC RESPONSE OF A FREE-STANDING MARBLE COLUMN, INCLUDING ROCKING AND SLIDING EFFECTS, IS PRESENTED IN THIS PAPER. THE ROCKING-SLIDING MODEL IMPLEMENTED FOR THE DEVELOPMENT OF THE ANALYSES CORRESPONDS TO THE BASIC THEORETICAL AND NUMERICAL SIMULATION OF THE DYNAMIC PHENOMENON. THE ASSESSMENT PROCEDURE ADOPTED FOR THE APPLICATION OF THE MODEL TO THE NON-LINEAR DYNAMIC INCREMENTAL TIME-HISTORY INVESTIGATION IS CHECKED BY COMPARISON WITH SIMPLIFIED RIGID BODY-BASED ANALYTICAL PREDICTIONS OF THE ROCKING-ONSET RESPONSE ACCELERATION AND THE OVERTURNING CRITICAL VELOCITY. THE RESULTS SHOW A HIGH SEISMIC VULNERABILITY OF THE COLUMN, AS IDENTIFIED BY SEVERE DAMAGE AT THE BASIC DESIGN EARTHQUAKE LEVEL, AND AN OVERTURNING-RELATED NEAR-COLLAPSE RESPONSE AT THE MAXIMUM CONSIDERED EARTHQUAKE LEVEL.
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