Hysteretic Energy Dissipation Capacity and the Cyclic to Monotonic Drift Ratio for Rectangular RC Columns in Flexure

Predictions of energy dissipation capacity and of the deterioration of deformation capacity due to cumulative damage have been made by means of a non-parametric empirical approach, called the conditional average estimator method, using empirical data on rectangular reinforced concrete columns that failed in flexure. Five input parameters were used: axial load index, index related to confinement, shear span index, concrete compressive strength, and longitudinal reinforcement index. The energy capacity was expressed in three different normalized forms and the deterioration of deformation capacity was defined as the ratio of the cyclic to the monotonic ultimate drift. The longitudinal reinforcement index, the index related to confinement, and the axial load index are the most influential input parameters in the case of energy capacity, whereas the latter two indices exhibit the most significant influence in the case of the drift ratio. Energy capacity decreases with an increasing axial load index, whereas it increases with increasing longitudinal reinforcement and with better confinement. In the case of the shear span index, the trend is more complex. Normal concrete has a higher energy dissipation capacity than high-strengthconcrete. Similar trends are observed for the drift ratio, with the exception of the influence of the axial load index, where the trend is opposite. The dispersion of the results is high.

POLJANSEK Karmen;  PERUS Iztok;  FAJFAR Peter; 

2009-05-11

JOHN WILEY & SONS LTD

JRC51336

0098-8847,   

http://www3.interscience.wiley.com/cgi-bin/fulltext/121535934/PDFSTART,    https://publications.jrc.ec.europa.eu/repository/handle/JRC51336,   

10.1002/eqe.875,