[1]朱小军,孔伟阳,龚维明.水平循环荷载下非连接式桩筏受力特性分析[J].哈尔滨工程大学学报,2019,40(04):752-758.[doi:10.11990/jheu.201708031]
 ZHU Xiaojun,KONG Weiyang,GONG Weiming.Analysis of the mechanical characteristics of disconnected piled raft under lateral cyclic loads[J].hebgcdxxb,2019,40(04):752-758.[doi:10.11990/jheu.201708031]
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水平循环荷载下非连接式桩筏受力特性分析(/HTML)
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《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2019年04期
页码:
752-758
栏目:
出版日期:
2019-04-05

文章信息/Info

Title:
Analysis of the mechanical characteristics of disconnected piled raft under lateral cyclic loads
作者:
朱小军12 孔伟阳1 龚维明2
1. 扬州大学 建筑科学与工程学院, 江苏 扬州 225127;
2. 东南大学 土木工程学院, 江苏 南京 210096
Author(s):
ZHU Xiaojun12 KONG Weiyang1 GONG Weiming2
1. School of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. School of Civil Engineering, Southeast University, Nanjing 210096, China
关键词:
桩筏基础非连接式桩筏桩基础垫层水平循环荷载水平荷载受力特性模型试验
分类号:
TU43
DOI:
10.11990/jheu.201708031
文献标志码:
A
摘要:
为了研究非连接式桩筏基础在水平静力及循环加载作用下的受力机理,在可视化水平循环加载装置中进行了室内模型试验,分析了加载方式、垫层厚度、循环幅值及次数对其水平刚度、土体位移及桩身内力的影响,并利用数字图像量测技术获取了土体的位移场。试验结果表明:非连接式桩筏基础的水平刚度随着循环次数的增加而增大,而滞回圈面积逐渐减小并趋于稳定;与水平静载试验相比,群桩中各基桩分担的水平荷载比例随循环加载发生重分配,后排桩的作用逐步得到更多发挥;当循环幅值较小时,前、中排桩所承担的弯矩值较为接近,随着循环幅值的增加,前排桩的作用得到加强;较桩筏基础相比,在水平静载及循环加载时,设置垫层均可显著减小桩身弯矩;前、中排桩的桩顶剪力分担比随着循环幅值的增加而增大,后排桩则呈现逐级减小的趋势。非连接式桩筏基础在水平及循环加载下受力特性的揭示可为今后的研究及工程应用提供参考。

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-08-11。
基金项目:国家自然科学基金项目(51478109,51678145);江苏省自然科学基金项目(BK20170509).
作者简介:朱小军,男,讲师;龚维明,男,教授,博士.
通讯作者:龚维明,E-mail:wmgong@seu.edu.cn
更新日期/Last Update: 2019-04-03