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首页> 外文期刊>Journal of Earthquake Engineering >Coupled Horizontal and Vertical Component Analysis of Strong Ground Motions for Soil-Pile-Superstructure Systems: Application to a Bridge Pier with Soil-Structure Interaction
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Coupled Horizontal and Vertical Component Analysis of Strong Ground Motions for Soil-Pile-Superstructure Systems: Application to a Bridge Pier with Soil-Structure Interaction

机译：耦合水平和垂直分量分析土壤桩上层建系统的强大研磨：用土结构相互作用应用于桥墩

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摘要

This study investigates the influence of vertical components (VCs) of seismic excitations on the response of short and tall (slender) superstructures, and compares them with the system response under only horizontal components (HCs). The first part of the study examines the capability of the bounding multi-surface plasticity model to identify dynamic soil properties and soil-pile-superstructure system response to the HCs of a strong ground motion using existing results from dynamic centrifuge tests. The influence of VCs on short and tall superstructures is then investigated, and compared with system response under only HCs. A procedure is proposed to select strong vertical ground motion to complete a nonlinear time-history analysis with a three-dimensional finite element model. Step-by-step modelling techniques are described with a direct-method framework to simulate complex soil-pile-superstructure systems. This study emphasises the role of VCs in the general response of the system in regard to selected damage parameters for pile foundations. The results indicate that VCs may have increasing effects on axial loads and maximum pile-cap displacements for short superstructures. In addition, contrary to the vertical vibration period of the superstructure, the variation of the superstructure's horizontal vibration period with the peak ground acceleration ratio (V/H) may be significant.
机译：本研究研究了垂直部件（VCS）对抗震激发的垂直分量（VCS）对短且高（细长）上层建筑的响应，并将其与水平组分（HCS）下的系统响应进行比较。该研究的第一部分检查了边界多表面塑性模型的能力，以使用动态离心测试的现有结果识别动态土壤性能和土壤堆积系统对强大地面运动HCS的响应。然后研究VCS对短而高的上层结构的影响，并与仅在HCS下的系统响应进行比较。提出了一种方法来选择强垂直地运动以完成具有三维有限元模型的非线性时间历史分析。通过直接方法框架描述了逐步建模技术来模拟复杂的土堆叠系统。本研究强调了VCS在系统对桩基造成损伤参数方面的一般响应中的作用。结果表明，VCS对短载体的轴向载荷和最大桩帽位移可能具有越来越大的影响。另外，与上部结构的垂直振动周期相反，上部结构的水平振动周期与峰接地加速度（V / H）的变化可能是显着的。

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