【摘要】 评价了欧洲桥梁抗震设计规范 (Eurocode 8,part2 ) [1] 关于延性桥梁抗震设计方法的安全性。以一座高架桥横向抗震设计为例 ,按 3个不同的性能系数设计圆柱式桥墩 ,根据欧规规定的最小配箍率配置箍筋 ,使用自编程序MCAP[2 ] 评价其实际达到的延性水平 ,并通过非线性时程分析评价其抗震性能。结果表明 ,欧洲规范规定的最小配箍率足以保证结构达到预期的最低延性能力 ,性能系数具有相当大的安全储备。同时可以借鉴欧洲规范 ,作为延性桥梁抗震设计的一种安全设计方法。更多还原

【Abstract】 The safety of ductile seismic design principle of ductile bridges specified in Eurocode 8 is evaluated. Taking lateral seismic design of a viaduct as an example, three columns, designed with different behavior factor and confined with the minimum amount of confining reinforcement specified in Eurocode 8, are analyzed by MCAP software to evaluate their ductility levels. By means of nonlinear time history analysis, the performance of three piers subjected to severe earthquake is evaluated. The results conclude that the minimum amount of confining reinforcement in Eurocode 8 could assure the expected ductility levels of ductile columns, and behavior factor has taken account of the additional safety reserve.更多还原