上海交通大学学报 ›› 2022, Vol. 56 ›› Issue (4): 431-442.doi: 10.16183/j.cnki.jsjtu.2020.382
收稿日期:
2020-11-19
出版日期:
2022-04-28
发布日期:
2022-05-07
通讯作者:
宋春雨
E-mail:chysong@sjtu.edu.cn
作者简介:
邱杰凯(1996-),男,四川省南充市人,硕士生,主要从事土与结构的动力相互作用.
基金资助:
QIU Jiekai, DING Zhaowei, SONG Chunyu(), CHEN Longzhu
Received:
2020-11-19
Online:
2022-04-28
Published:
2022-05-07
Contact:
SONG Chunyu
E-mail:chysong@sjtu.edu.cn
摘要:
为直接求解桩周土切变模量随深度线性变化情形下的单桩水平动力响应问题,基于成层广义Gibson地基,引入Adomian分解法,提出了一种求解非均质地基中桩水平动力响应的方法.相较于初参数法和传递矩阵法,该方法无需对非均质地基进行离散化处理.与数值方法相比,具有计算成本低、精度高和收敛速度快等优点.通过将本文方法和分层方法、均质地基解析方法、数值方法的计算结果进行对比,验证了本文方法的正确性和合理性.分析了桩底边界条件、地基土参数及桩身长细比对桩水平动力响应的影响.结果表明:在非均质地基中,桩土刚度比是影响桩水平动力响应的重要因素,随着地基土切变模量的增大,桩身水平位移幅值减小且分布趋于平缓.此外,相比于其他参数,土层泊松比和阻尼比对桩的水平动力响应影响较小.
中图分类号:
邱杰凯, 丁肇伟, 宋春雨, 陈龙珠. 成层广义Gibson地基中桩的水平动力响应[J]. 上海交通大学学报, 2022, 56(4): 431-442.
QIU Jiekai, DING Zhaowei, SONG Chunyu, CHEN Longzhu. Horizontal Dynamic Response of Pile Based on Layered Generalized Gibson Foundation[J]. Journal of Shanghai Jiao Tong University, 2022, 56(4): 431-442.
表1
桩端水平动力位移幅值与 N的关系
N | ||
---|---|---|
2 | 0.819792340 | 2.708522741 |
3 | 0.575465393 | 0.438747062 |
4 | 0.588914776 | 0.094956192 |
5 | 0.589908739 | 0.103157714 |
6 | 0.589898262 | 0.103125582 |
7 | 0.589898281 | 0.103125562 |
8 | 0.589898281 | 0.103125562 |
9 | 0.589898281 | 0.103125562 |
10 | 0.589898281 | 0.103125562 |
11 | 0.589898281 | 0.103125562 |
12 | 0.589898281 | 0.103125562 |
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