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文章归纳总结了Pushover分析方法的原理与实施步骤,并应用该方法对1座3柱式桥墩进行横向抗震性能评价;分别建立墩底固结与考虑桩基础等代弹簧刚度的计算模型,对其进行不同侧向加载模式下的Pushover分析并将得到的结果进行对比。结果表明:不同侧向加载模式下Pushover分析结果存在一定差异;在墩底固结边界条件下所得到的Pushover曲线的屈服荷载与屈服位移都偏小,因此在抗震分析建模时取墩底固结边界是偏安全的;该3柱式桥墩在设计烈度地震下具有足够的横向抗震性能力。
This paper summarizes the principle and implementation steps of Pushover analysis method, and applies the method to evaluate the lateral seismic performance of a three-post pier. The calculation models of pier stiffness and pile stiffness are established respectively. Pushover analysis in different lateral loading modes is performed and the results obtained are compared. The results show that there are some differences in the pushover analysis results under different lateral loading modes. The yield load and yield displacement of the Pushover curve obtained under the consolidation boundary conditions are both small, so take the bottom solid at the time of modeling The junction boundary is biasedly safe; the 3-pillared piers have sufficient lateral seismic resistance under design seismic intensity.