右旋螺纹钢锚杆横肋间距锚固优化数值模拟研究

Title

Numerical simulation study on rib spacing anchorage optimization ofright-handed rebar bolts
作者

马双文张明 CAO Chen 张怀东 REN Ting 韩军
Author

MA Shuangwen，ZHANG Ming，CAO Chen，ZHANG Huaidong，REN Ting， HAN Jun
单位

辽宁工程技术大学矿业学院澳大利亚伍伦贡大学土木、采矿与环境学院辽宁省煤炭资源安全开采与洁净利用工程研究中心
Organization

1.College of Mining,Liaoning Technical University,Fuxin ,China; 2.EIS，University of Wollongong,Wollongong ,Australia;3.Liaoning Province Coal Resources Safety Mining and Clean Utilization Engineering Research Center,Fuxin ,China
摘要

为了研究右旋螺纹钢锚杆不同横肋间距对其锚固性能的影响，通过ANSYS有限元数值模拟软件分析了在简支约束条件下60、100 kN载荷下横肋间距为12、24、36、48和60 mm的右旋锚杆锚固试件的受力状态。模拟结果显示：2种载荷下，锚杆杆体表面最大应力在横肋间距12、24、36、48 mm时增长较为显著，与横肋间距48 mm相比，横肋间距为60 mm时最大应力无明显增长；杆体横肋对应的树脂圈凹槽处易形成应力集中区域，且在横肋间距为48 mm时应力峰值达到最大；试件套筒外壁应变随着横肋间距增加先增大而后减小，在横肋间距为48 mm时达到最大。分析表明，在树脂与套筒内壁和杆体锚固段锚固密实情况下，横肋间距为48 mm时试件的锚固性能最优。
Abstract

In order to study the effect of different rib spacing on its anchorage performance of right-handed rebar bolts, ANSYS finite element numerical simulation software is used to analyze the stress state of specimens with rib spacing of 12, 24, 36, 48 and 60 mm under 60 kN and 100 kN loads under simple support constraints.The simulation results show that under the two loads, the maximum stress of the on the surface of the anchor rod increased significantly with the rib spacing increasing from 12, 24, 36, to 48 mm.Compared with the rib spacing of 48 mm, the maximum stress do not increase for rib spacing 60 mm; The stress concentration zone is easily formed in the groove of the resin annulus corresponding to the rib of the bolt, and the peak stress reaches the maximum value when the spacing of the rib spacing is 48 mm.The strain value of the outer wall of the specimen increases firstly and then decreases with the increase of the spacing of the transverse ribs, and it reaches the maximum when the rib spacing is 48 mm.Result shows that the anchoring performance of rib spacing 48 mm specimen is the best when spacing between the rock and the bolt is fully filled with grouting material.The analysis shows that the anchoring performance of the rib spacing of 48 mm is optimal when spacing between the rock and the bolt is fully filled with grouting material.
关键词

右旋螺纹钢锚杆数值模拟横肋间距锚固性能
KeyWords

kight-handed rebar bolt; numerical simulation;rib spacing; anchoring performance
基金项目(Foundation)

辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助课题(项目编号LNTU15KF02）
图表
图(2) / 表(0)