›› 2018, Vol. 39 ›› Issue (3): 1145-1152.doi: 10.16285/j.rsm.2016.0622

• 测试技术 • 上一篇    

一种适用于室内模型试验的循环加载装置研制及试验研究

汪明元1,吴金标2,张建经2,廖蔚茗2,闫孔明2   

  1. 1. 中国电建集团华东勘测设计研究院有限公司,浙江 杭州 310014;2. 西南交通大学 土木工程学院,四川 成都 6100311
  • 收稿日期:2016-06-18 出版日期:2018-03-12 发布日期:2018-06-06
  • 通讯作者: 吴金标,男,1991年生,硕士研究生,主要从事与海洋风电基础相关的研究工作。E-mail: jinbiao_wu@my.swjtu.edu.cn E-mail:wmy_90@163.com
  • 作者简介:汪明元,男,1972年生,博士,教授级高工,主要从事海洋岩土工程、岩土工程数值分析方法等方面的研究工作。
  • 基金资助:

    中国电建集团科技项目(No.SD2013-10)

Development of a cyclic loading instrument for laboratory model test and its experimental study

WANG Ming-yuan1, WU Jin-biao 2, ZHANG Jian-jing2, LIAO Wei-ming 2, YAN Kong-ming2   

  1. 1. Power China Construction Group East China Investigation and Design Institute Corporation Limited, Hangzhou, Zhejiang 310014, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
  • Received:2016-06-18 Online:2018-03-12 Published:2018-06-06
  • Supported by:

    This work was supported by Science and Technology Project from Power China Construction Group (SD2013-10).

摘要: 设计了一套适用于室内模型试验的循环加载装置,该装置主要由水平滑动系统、动力系统以及反力架系统组成,具有稳定可靠,制造加工成本低廉,且荷载幅值和频率可调节等优点。将装置输出的实测荷载与理论值进行对比,并利用该装置对海洋风机单桩式基础进行循环荷载试验研究,结果表明:实测荷载与理论值之间的拟合相似程度为91.3%,输出荷载稳定可靠;淤泥质软土地基中单桩式基础的位移在循环加载初期增长很快之后逐渐趋于稳定,桩后土体与桩分离形成间隙,桩前及桩侧土体出现径向裂纹;桩身弯矩会随着加载次数的增加而呈现累积增加的趋势,最后逐渐趋于稳定,桩身最大弯矩出现在土表下4D~5D(D为桩径)。基于以上结果表明,该循环加载装置设计合理、能够提供稳定可靠的荷载,且能满足模型试验的要求。

关键词: 循环加载装置, 室内模型试验, 单桩式基础, 累积变形

Abstract: A cyclic loading device was designed suitable for laboratory model test. The device, consisting of the motion system, driving system and reaction frame system, has the advantages of stability, low cost in manufacturing, adjustable load frequency and alterable amplitude of loads. The cyclic loading device is used to investigate the dynamic response and cyclic behavior of monopiles installed in the laboratory test box. The test results indicate that the similarity between measured load and theoretical load is about 91.3%, indicating that the load exported from the device is very stable and accurate. The accumulated deformation of monopiles in the soft clay increases at the beginning then gradually tends to be stable. Soil behind the pile is separated from monopiles and the cracks are formed in the surface soil surrounding the pile. The maximum moment along monopiles increases with the number of cyclic loads at the beginning, then tends to be stable after about 1 000 cyclic loads. The location of maximum moment of monopiles is about 4-5 times of pile diameter under mudline. It shows that the design of the loading device is rational, and suitable and reliable for the model test.

Key words: cyclic loading device, laboratory test, monopiles, accumulated deformation

中图分类号: 

  • TU 473

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