ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 04 OCTOBER 2014: 

Title:        Testing of CFRP Retrofitted RC Circular Hollow Bridge Column under Seismic Demand
Authors:   Ahsan Ali, Syed Muhammad Ali, Muhammad Taimur Khan, Asif Ali, Shahzad Rehman
Abstract:  Bridges are considered as life line structures. During an earthquake, dynamic forces induce inertial force into the structure which results in damage to lateral load resisting members, which are typically piers in bridges. Hollow bridge columns are required when longer spans are constructed or taller piers are needed or both. The hollow piers are subjected to high seismic demand, hence it is essential to evaluate their seismic performance. In this research the energy dissipation capacity of CFRP retrofitted RC circular hollow bridge column under seismic demand has been calculated. A representative prototype dimensions were established from the available bridge drawings and a scale down hollow column model was prepared using similitude analysis. The model column was subjected to unknown damage. The damaged model was then retrofitted by using CFRP wrap. The time period of the model column was calculated and the retrofitted column was subjected to quasi-static cyclic testing. The energy dissipated per cycle and the cumulative energy dissipated was calculated from the load displacement data. The energy dissipation data of retrofitted hollow column was compared with energy dissipation data of solid circular and retrofitted solid circular column data of previous researchers and an R-Factor value for hollow bridge column was also proposed.


Keywords:  CFRP, Energy dissipation, Hollow bridge column, Seismic demand, Quasi-static cyclic testing
Page no:      403-410

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