岩土力学2023，Vol.44Issue(12)：3629-3638,10.DOI:10.16285/j.rsm.2022.1968
倾斜液化场地-桩基-结构体系在近场脉冲与非脉冲地震动下地震响应差异分析
Difference analysis of seismic responses of inclined liquefaction site-pile-structure system under near-field pulsed and non-pulsed ground motions
摘要
Abstract
In this paper,the seismic responses of inclined liquefaction site-pile-structure system under near-field pulsed and non-pulsed ground motion were studied.Firstly,a finite element model of inclined liquefaction site-pile-structure system was established based on the finite element platform OpenSees,and the reliability of the numerical model was verified by comparing with the results of large-scale shaking table test.On this basis,the finite element model of typical inclined liquefaction site-pile-structure system was established,the seismic response laws of the system under near-field pulsed and non-pulsed ground motion were compared and analyzed,and the correlation analysis between ground motion intensity index and seismic response was carried out.The results show that compared with the non-pulsed ground motion,the residual displacement of the site increases obviously under the near-field pulsed ground motion,especially at the top of the loose sand layer,which increases by about 40％.Pile bending moment and pile residual displacement increase significantly,especially at the pile top.The correlation between the ground motion intensity index and the response under non-pulsed ground motion is higher than that under pulsed ground motion.Three strength parameters with good correlation,i.e.PGV/PGA(peak ground velocity/peak ground acceleration),AI(Arias intensity)and Tm(mean period),can indicate the influence of ground motion on the failure response of liquefaction site-pile-structure system to a certain extent.关键词
脉冲地震动/倾斜液化场地/桩基础/数值模拟/地震响应/地震动参数/相关性分析Key words
pulse ground motion/inclined liquefaction site/pile foundation/numerical simulation/seismic response/ground motion parameters/correlation analysis分类
建筑与水利引用本文复制引用
张正哲,贾科敏,许成顺,潘汝江..倾斜液化场地-桩基-结构体系在近场脉冲与非脉冲地震动下地震响应差异分析[J].岩土力学,2023,44(12):3629-3638,10.基金项目
国家自然科学基金杰出青年基金(No.52225807).This work was support by the National Natural Science Foundation of China for Distinguished Young Scholars(No.52225807). （No.52225807）
