Experimental investigations of the Seismic Behavior of RC Bridge Piers under Variable Axial Load

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (18) : 131-139.

Chen Rong 1,2 Lei Junqing 1

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Abstract

To study the seismic performance of RC bridge piers under variable axial force, cyclic loading test were carried out on six specimens, of which one was under constant axial load and the other five with different longitudinal reinforcement ratio, volumetric percentage of stirrups, and shear span ratio were subjected to variable axial force. Based on the test result, the hysteretic curve, fracture distribution, skeleton line, displacement ductility factor, residual deformation, and energy dissipation capacity of the tested specimens were studied. It indicated that variable axial force has apparent influence on the displacement, residual deformation, and the level of destruction of RC bridge piers. According to the performance-based seismic design and the codes of highway bridges, suggestion was proposed to consider varying axial load during design.

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reinforced concrete bridge pier / variable axial load / seismic performance / the performance-based design

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Chen Rong 1,2 Lei Junqing 1. Experimental investigations of the Seismic Behavior of RC Bridge Piers under Variable Axial Load[J]. Journal of Vibration and Shock, 2017, 36(18): 131-139

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