学术论文详情

摘要：In order to study the confining reinforcement requirement for ductile RC bridge columns, the code provisions of confining reinforcement in the potential plastic hinge regions of bridge columns in China, USA and Europe were summarized. Then, 234 pseudo-static test data for bridge columns were collected from Pacific Earthquake Engineering Research Center (PEER) column database, Kawashima Laboratory and other literatures in China. The relationships between the ultimate drift ratios and displacement ductility factors and curvature ductility factors of the columns were developed. The code provisions for the amount of confining reinforcement in bridge columns in China, USA and Europe were evaluated. Then, calculated equations of amount of confining reinforcement required to achieve a given ultimate drift ratios of 2% and 3% with 85% assurance rate were proposed based on regression analysis. Through a practical example, comparisons of equations in the paper and code at home and abroad were carried out. Results show that the proposed equations can be used for the bridge columns with aspect ratio 3 to 10 and can keep good seismic capacity for the columns under high axial load ratio but is not very conservative for the columns under low axial load ratio.