锚杆拉拔试验的理论和数值分析

›› 2006, Vol. 27 ›› Issue (S1): 855-859.

锚杆拉拔试验的理论和数值分析

贺若兰^1，2，张平³，刘宝琛²

1. 长沙理工大学桥结学院，长沙 410076；2. 中南大学土建学院，长沙 410075；3. 湖南大学土木工程学院，长沙 410082

收稿日期:2006-07-10 发布日期:2006-12-15
作者简介:贺若兰，女，1975年生，博士研究生，讲师，主要从事岩土工程教学科研工作。
基金资助:
湖南省教育厅科研基金资助项目（No. 05C264）。

Theoretical and numerical analysis of bolt pull-out test

HE Ruo-lan^{1, 2}，ZHANG Ping³，LIU Bao-chen²

1. School of Bridge and Structure Engineering, Changsha University of Science and Technology, Changsha 410076, China; 2. School of Civil and Architectural Engineering, Central South University, Changsha 410075, China; 3. College of Civil Engineering, Hunan University, Changsha 410082, China

Received:2006-07-10 Published:2006-12-15

摘要/Abstract

摘要： 详细分析了现场锚杆拉拔试验的实测数据，说明了传统设计中认为界面抗剪应力平均分布的简化假定与近似服从负指数分布的实测结果存在误差。考虑界面黏结强度中化学胶着力、机械咬合力和界面摩擦力逐渐丧失的过程，建立了一个可以通过现场拉拔试验得到的极限荷载反算出界面抗剪强度和解耦长度的理论模型。引入一种可以模拟锚杆与岩土界面复杂力学特性的摩擦-接触型界面单元建立数值模型进行仿真分析，再现了现场试验全过程的力学响应。通过与实测数据对比分析，验证了理论模型和数值分析的可靠性和精度。

关键词: 锚杆, 拉拔试验, 界面黏结强度, 理论模型, 数值分析

Abstract: Based on the pull-out test on bolts in-situ, the test data are analyzed and the difference of shear stress distribution along the bolt is discovered between the usual simplified assumption and the actual condition. In usual analysis, the shear stress along the bolt is assumed even distribution, but the real result is negative exponential distribution under pull-out condition. Considering the working mechanism and damage process of cohesion strength, a theoretical model for the pull-out bolt is rebuilt. In this model, the interface shear strength and uncoupling length parameter can be easily deduced from the ultimate load measured from pull-out test. Furthermore, a numerical model including a friction-contact interface element which can simulate the complex mechanical properties of the interface is introduced; and the mechanical response of bolt under pull-out load is analyzed. Comparing the calculation result with the field test, the reliability and precision of the theoretical model and numerical analysis are verified.

Key words: bolt, pull-out test, interface cohesion strength, theoretical model, numerical analysis

中图分类号:

TB 301

贺若兰，张平，刘宝琛,. 锚杆拉拔试验的理论和数值分析[J]. , 2006, 27(S1): 855-859.

HE Ruo-lan ，ZHANG Ping ，LIU Bao-chen,. Theoretical and numerical analysis of bolt pull-out test[J]. , 2006, 27(S1): 855-859.

参考文献

相关文章 15

[1]	吴秋红, 赵伏军, 王世鸣, 周志华, 王斌, 李玉, . 动力扰动下全长黏结锚杆的力学响应特性[J]. 岩土力学, 2019, 40(3): 942-950.
[2]	李宁, 杨敏, 李国锋. 再论岩土工程有限元方法的应用问题[J]. 岩土力学, 2019, 40(3): 1140-1148.
[3]	郑黎明, 张洋洋, 李子丰, 马平华, 阳鑫军, . 低频波动下考虑孔隙度与压力不同程度变化的岩土固结渗流分析[J]. 岩土力学, 2019, 40(3): 1158-1168.
[4]	王建军, 陈福全, 李大勇. 低填方加筋路基沉降的Kerr模型解[J]. 岩土力学, 2019, 40(1): 250-259.
[5]	胡帅伟, 陈士海, . 爆破振动下围岩支护锚杆动力响应解析解[J]. 岩土力学, 2019, 40(1): 281-287.
[6]	刘钟, 张楚福, 张义, 吕美东, 许国平, 陈天雄, . 囊式扩体锚杆在宁波地区的现场试验研究[J]. 岩土力学, 2018, 39(S2): 295-301.
[7]	谷拴成，周攀，黄荣宾. 锚杆–围岩承载结构支护下隧洞稳定性分析[J]. , 2018, 39(S1): 122-130.
[8]	崔国建，张传庆，刘立鹏，周辉，程广坦,. 锚杆杆体–砂浆界面力学特性的剪切速率效应研究[J]. , 2018, 39(S1): 275-281.
[9]	周勇，王旭日，朱彦鹏，李京榜，蒋小奎,. 强风化软硬互层岩质高边坡监测与数值模拟[J]. , 2018, 39(6): 2249-2258.
[10]	陈文强，赵宇飞，周纪军,. 考虑受压侧岩体反力非线性作用的锚杆抗剪理论[J]. , 2018, 39(5): 1662-1668.
[11]	闫澍旺，李嘉，闫玥，陈浩，. 黏性土地基中竖向圆孔的极限稳定深度研究[J]. , 2018, 39(4): 1176-1181.
[12]	赵象卓，张宏伟，CAO Chen，张明，张怀东，韩军, . 不同围岩条件下锚杆肋间距与锚固力优化研究[J]. , 2018, 39(4): 1263-1270.
[13]	阿比尔的，郑颖人，冯夏庭，丛宇,. 平行黏结模型宏细观力学参数相关性研究[J]. , 2018, 39(4): 1289-1301.
[14]	黄明华，赵明华，陈昌富. 锚固长度对锚杆受力影响分析及其临界值计算[J]. , 2018, 39(11): 4033-4041.
[15]	郭浩然，乔兰，李远. 能源桩与周围土体之间荷载传递模型的改进及其桩身承载特性研究[J]. , 2018, 39(11): 4042-4052.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed