SANISAND本构模型对不同荷载下桩土相互作用的适用性研究

孟晓伟; 翟恩地; 许成顺

doi:10.19912/j.0254-0096.tynxb.2023-0178

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (6) : 619-627. DOI: 10.19912/j.0254-0096.tynxb.2023-0178

SANISAND本构模型对不同荷载下桩土相互作用的适用性研究

孟晓伟¹, 翟恩地^1,2, 许成顺¹

作者信息 +

RESEARCH ON APPLICABILITY OF SANISAND CONSTITUTIVE MODEL TO PILE-SOIL INTERACTION UNDER DIFFERENT LOADS

Meng Xiaowei¹, Endi Zhai^1,2, Xu Chengshun¹

Author information +

文章历史 +

摘要

该文通过土体三轴试验数据确定本构参数,并建立场地试验和离心机试验的有限元模型,研究SANISAND本构模型对于静力、地震和循环荷载下桩土相互作用的适用性。结果表明,SANISAND本构模型能较好再现水平静力荷载下不同桩径的桩顶荷载-位移特性,地震作用下加速度和孔压时程曲线变化趋势以及短期循环水平荷载下的桩变形特性,但无法较好地再现砂土由于剪胀引起的孔压负峰值和长期循环荷载下的累积变形,所以主要关注这些问题时建议选择更合适的本构模型。

Abstract

In this paper, the constitutive parameters are determined based on the triaxial test data, and the finite element model of the field test and the centrifuge test is established. The applicability of the SANISAND constitutive model to pile-soil interaction under static, seismic, and cyclic loads is investigated in order to provide a reference for its engineering design application. The results indicate that the SANISAND constitutive model can well reproduce the pile top load-displacement characteristics of different pile diameters under horizontal static loads, the variation trend of acceleration and pore pressure time history curves under earthquakes, and the pile deformation performance under short-term cyclic horizontal loads. However, it is not possible to accurately reproduce the negative peak pore pressure caused by dilatation as well as the cumulative deformation under long-term cyclic loads.

导出引用

孟晓伟, 翟恩地, 许成顺. SANISAND本构模型对不同荷载下桩土相互作用的适用性研究[J]. 太阳能学报. 2024, 45(6): 619-627 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0178

Meng Xiaowei, Endi Zhai, Xu Chengshun. RESEARCH ON APPLICABILITY OF SANISAND CONSTITUTIVE MODEL TO PILE-SOIL INTERACTION UNDER DIFFERENT LOADS[J]. Acta Energiae Solaris Sinica. 2024, 45(6): 619-627 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0178

中图分类号： TU44

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