[1]刘小军,孔 庆,孙晓骥,等.黄土天然节理大型直剪试验研究[J].西安建筑科技大学学报(自然科学版),2017,49(05):680-0692.[doi:10.15986/j.1006-7930.2017.05.010]
　LIU Xiaojun,KONG Qing,SUN Xiaoji,et al.Large-scale direct shear test study on natural loess joint[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2017,49(05):680-0692.[doi:10.15986/j.1006-7930.2017.05.010]
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黄土天然节理大型直剪试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
49
期数:
2017年05期
页码:
680-0692
栏目:
出版日期:
2017-10-28

文章信息/Info

Title:
Large-scale direct shear test study on natural loess joint
文章编号:
1006-7930(2017)05-0680-06
作者:
刘小军1; 孔 庆1; 孙晓骥2; 王 震1
(1.西安建筑科技大学 土木工程学院,陕西 西安,710055 2.西安长庆科技工程有限责任公司,陕西 西安710021)
Author(s):
LIU Xiaojun;  KONG Qing;  SUN Xiaoji;  WANG Zhen
(1. College of Civil EngineeringXian Univ. of Arch. Tech.Xian 710055China; 2. . Tech., Xian 710021China)
关键词:
锈蚀箍筋; 约束混凝土柱; 低周反复荷载; 关键参数; 抗震性能
Keywords:
loess joints;  large-scale direct shear test ; shear strength;  Size effect
分类号:
TU411
DOI:
10.15986/j.1006-7930.2017.05.010
文献标志码:
A
摘要:
为了解锈蚀箍筋约束混凝土柱的抗震性能，通过加速锈蚀试验得到8根锈蚀混凝土柱，并对其进行低周反复荷载试验，研究箍筋锈蚀后混凝土柱的受力特点和破坏机制，对比分析箍筋直径、箍筋间距等参数变化对锈蚀箍筋约束混凝土柱的承载能力、延性、滞回特性、刚度退化、强度退化和耗能等抗震性能指标的影响结果表明：箍筋锈蚀后，混凝土受到的约束作用降低，导致混凝土柱抗震性能退化；随着箍筋锈蚀量增大，柱破坏时的极限位移减小，滞回曲线出现捏拢现象且逐渐明显，强度降低程度和刚度衰减程度均增大，延性和耗能能力降低，相同控制位移下的累计耗能量增大.
Abstract:
Shear strength and deformation law of loess joint has important influence on the engineering stability, but the research of this area is still inadequate. Therefore this study first collected loess vertical joints and natural soil samples, and then use the lab large-scale direct shear test method, studied the natural joint shear strength and deformation properties of loess, finally compared with small direct shear test results, the size effect of joint shear strength of loess are studied. Research has shown that large direct shear test to get the Angle of internal friction peak is 47.37 DHS, small direct shear test to get the Angle of internal friction peak of 35.17 DHS; Normal stress is small, initial shear stiffness is bigger, the stress-strain curve peak; Normal stress is larger, the initial shear stiffness is small, no peak stress-strain curve, the shear strength increases with strain, while ultimately tend to be stable; Loess joint size effect, direct shear test is mainly affects sample size’s contribution to the shear strength of joint surface fluctuation degree, the greater the size, the shear strength

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2017-01-17 修改稿日期：2017-08-17
基金项目：国家自然科学基金资助项目(51408464)；陕西省教育厅基金专项资助(14JK1413)；西安建筑科技大学人才科技基金项目(RC1365)
作者简介：刘小军（1983—），男，副教授，主要从事岩土及地下工程方面的教学与研究工作．E-mail；liuyu8345@163.com在此处键入
更新日期/Last Update: 2017-11-09