【摘要】 对6种等效线性化方法等效模型进行分析和总结,研究等效线性化方法应用于桥梁结构基于位移抗震设计的可行性及计算过程。以箍筋体积配箍率和桥梁结构承载能力为评价因素,对钢筋混凝土桥梁墩柱采用不同等效线性化方法进行基于位移的抗震设计,研究了等效线性化方法及阻尼调整系数对抗震设计结果的影响。研究表明,各种等效线性化方法应用于基于位移的抗震设计其计算结果存在较大差异,等效阻尼比对基于位移的抗震设计结果影响显著,不同的阻尼调整系数得到的计算结果也不同。在所研究的6种等效线性化方法中,Kowalsky方法、Iwan方法和欧进萍方法计算误差较小,随着位移延性系数的增大,Kowalsky方法的计算误差减小。应用Eurocode8规范提供的阻尼调整系数计算得到的结果与真实值较为接近。建议采用Eurocode8规范提供的阻尼调整系数和Kowalsky方法进行基于位移的抗震设计。更多还原

【Abstract】 Six equivalent linearization methods are summarized and the calculation process for applying these methods to displacement-based design of bridge engineering is studied.With the evaluation of volume stirrup ratio and safety performance of design structure,these methods are used in displacement-based design of bridge columns.The influence of equivalent linearization model and damping adjustment coefficient on seismic design results is studied.The results show that there are big differences among the seismic design results based on different equivalent linearization methods.The equivalent damping ratio model and the damping adjustment coefficient have great influence on seismic design results.Calculation errors of Kowalsky method,Iwan method and Ou method are very small.The calculation error of Kowalsky method decrease when the displacement ductility factor increases.The calculated results based on the damping adjustment coefficient provided by Eurocode8 specification is more close to the real one.The Kowalsky method and the damping adjustment coefficient of Eurocode8 specification are recommended to be used in displacement-based design of bridge engineering.更多还原