...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Seismic response of bridge piers on pile groups for different soil damping models and lumped parameter representations of the foundation
【24h】

Seismic response of bridge piers on pile groups for different soil damping models and lumped parameter representations of the foundation

机译：桩墩在不同土壤阻尼模型下的地震反应及地基参数集中表示

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents a wide parametric study aimed at elucidating the influence, on the computed seismic response of bridge piers, of two related aspects of the model: (1) the adoption of the classical hysteretic or the causal Biot's damping models for the soil and (2) the use of two different lumped parameter models of different complexity and accuracy to approximate the impedances of the pile foundation. A total of 2072 cases, including different superstructures, pile foundations, soil deposits, and seismic input signals, are studied. The results are presented so that the influence of the different parameters involved in the analysis can be assessed. From an engineering point of view, both lumped parameter models provide, in general, sufficiently low errors. The choice of the most adequate model for each case will depend not only on the configuration of the structure and the soil-foundation system but also on the assumed soil damping model, whose influence on the computed seismic responses is relevant in many cases. The nonphysical behaviour provided by the classical hysteretic damping model for the soil at zero frequency generates issues in the process of fitting the impedance functions. It is also found that larger deck displacements are predicted by Biot's model due to the higher damping at low frequencies provided by the classical hysteretic damping model.
机译：本文提出了一项广泛的参数研究，旨在阐明模型的两个相关方面对桥墩的地震响应的影响：（1）对土壤采用经典滞后或因果比奥阻尼模型，以及（ 2）使用两个具有不同复杂度和准确性的不同集总参数模型来近似桩基的阻抗。共研究了2072个案例，包括不同的上层建筑，桩基，土壤沉积和地震输入信号。给出结果，以便可以评估分析中涉及的不同参数的影响。从工程角度来看，两个集总参数模型通常提供足够低的误差。针对每种情况选择最合适的模型，不仅取决于结构和土壤基础系统的构造，还取决于假定的土壤阻尼模型，在许多情况下，其对计算的地震响应的影响是相关的。经典滞后阻尼模型在零频率下为土壤提供的非物理行为会在拟合阻抗函数的过程中产生问题。还发现由于经典滞后阻尼模型在低频下具有更高的阻尼，因此Biot模型可预测更大的甲板位移。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号