Simplified Analysis model of Circular Concretefilled Steel Tube Specimen Under Lateral Impact

Abstract:

The dynamic response of fixedend concretefilled steel tube specimens under lateral impact is numerically simulated.The developing mechanics and characteristics of “plastic hinges” at the location of the midspan and support section of these specimens are then analyzed.At last,a simplified analytic model is put forward to predict the maximum deflection of circular concretefilled steel tube specimen under lateral impact.The comparisons and validations of a set of cases show that the results from the simplified analytic model agree well to the results from the numerical model.The simplified analytic model can give an ideal prediction on the dynamic ultimate moments of the support and midspan sections and the maximum deflection of the midspan.It can also be referenced by engineering.

Key words:concretefilled steel tube; plastic hinge; impact; numerical simulation