Modelling of Rocking and Sliding Effects in the Seismic Analysis of a Free-Standing Column

Abstract A study on the seismic response of a free-standing marble column, including rocking and sliding effects, is presented in this paper. The rocking-sliding model implemented for the development of the analyses corresponds to the basic theoretical and numerical simulation of the dynamic phenomenon. The assessment procedure adopted for the application of the model to the non-linear dynamic incremental time-history investigation is checked by comparison with simplified rigid body-based analytical predictions of the rocking-onset response acceleration and the overturning critical velocity. The results show a high seismic vulnerability of the column, as identified by severe damage at the basic design earthquake level, and an overturning-related near-collapse response at the maximum considered earthquake level.

摘要 本文针对独立式大理石柱的地震响应展开研究，涵盖摇摆与滑移效应。本研究分析中所采用的摇摆-滑移模型，对应该动力现象的基础理论与数值模拟方法。针对将该模型应用于非线性动力增量时程分析的评估流程，通过与基于简化刚体的摇摆起始响应加速度、倾覆临界速度的解析预测结果进行对比，完成了验证。研究结果表明，该柱体具有较高的地震易损性：在基本设计地震水准下即出现严重损伤，在最大考虑地震水准下则发生与倾覆相关的近倒塌响应。