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在FEMA440考虑土-结构相互作用的能力谱法基础上,以客运专线双柱式桥墩为研究对象,选取与我国《铁路工程抗震规范》Ⅱ类场地相符合的80条强震记录,并以此得到具有统计意义的弹性反应谱;利用FEMA440改进等效线性化法对其进行修正,得到考虑土-结构相互作用的修正需求谱;进而利用FEMA440性能点轨迹法求解双柱式桥墩延性需求及性能点,并与80条强震记录非线性时程分析计算结果的平均值进行比较,验证将考虑土-结构相互作用的能力谱法应用于铁路桥梁工程抗震性能评估的可行性。
Based on the FEMA440 capability spectrum method considering the soil-structure interaction, taking the double-column piers of passenger dedicated railway as the research object, 80 strong earthquake records that are in line with the Class Ⅱ sites of “Seismic Code for Railway Engineering” are selected, The elastic response spectra with statistical significance were obtained. The modified linear equivalent method FEMA440 was used to correct the soil-structure interaction demand, and the modified demand spectrum was obtained. Then, the FEMA440 performance point trajectory method was used to solve the ductility requirements and performance of double-column pier Point and compare them with the average of the nonlinear time history analysis results of 80 strong earthquakes records to verify the feasibility of applying seismic profiling method considering the soil-structure interaction to the seismic performance evaluation of railway bridge engineering.