植筋技术用于格梁缺陷加固的模型试验研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Model Tests Study on Reinforcing Technique of Lattice Defects Embedding Steel Bars 作者：梁炯 ; 周云涛 ; 石胜伟 ; 张勇 ; 蔡强 ; 蔡佳君 英文作者：LIANG Jiong;ZHOU Yuntao;SHI Shengwei;ZHANG Yong;CAI Qiang;CAI Jiajun;Institute of Exploration Technology,Chinese Academy of Geological Sciences;Technical Center for Geological Hazard Prevention and Control,CGS; 关键词：滑坡 ; 锚杆格梁 ; 植筋技术 ; 模型试验 英文关键词：landslide;;anchor cable;;planting bar technology;;model test 中文刊名：RMHH 英文刊名：Yellow River 机构：中国地质科学院探矿工艺研究所;中国地质调查局地质灾害防治技术中心; 出版日期：2019-02-10 出版单位：人民黄河 年：2019 期：v.41;No.402 基金：国土资源部公益性行业科研专项(201511051) 语种：中文; 页：RMHH201902032 页数：5 CN：02 ISSN：41-1128/TV 分类号：147-151

摘要

通过开展植筋技术用于格梁缺陷加固的模型试验研究,分析了植筋技术加固前后格梁随着荷载的增加,内力和弯矩的变化情况,结果表明:滑坡推力作用在植筋层和格梁复合体上时,二者并不是同时受力,植筋层先于格梁受力,植筋层所承受的荷载分担比约为78%;经过植筋技术加固缺陷格梁后,配筋受力得到改善,加固后配筋最大应力比加固前降低了36.5%;植筋技术加固后缺陷格梁弯矩明显降低,为加固前的20%～30%,说明植筋技术加固缺陷格梁效果显著。
        The variation laws of internal force and moment of the beams were analyzed with the increase of loads before and after the lattices were repaired,based on the experimental study on reinforcing technique of the lattice defects embedding steel bars.The results show that when the thrust of the landslide forces acted on the composite of planting bar layer and the girder,the two are not simultaneously stressed,and it can be indicated that the planting bar layer is subjected to the force of the grid beam,and the load sharing ratio is about 78%.After planting bar reinforcement,the planting bar stress is improved,and the maximum stress after planting bar reinforcement is 36.5% lower than that before reinforcement.After embedding bar reinforcement,the bending moment of the beams is obviously reduced,that is about 20%-30% before reinforcement.It can be indicated that the effect of planting bar reinforcement is remarkable.

引文

[1]梁炯,石胜伟,张勇,等.锚杆格构梁受力分布的现场模型试验研究[J].人民长江,2017,48(10):69-73.
    [2]张涛,石胜伟,谢忠胜,等.格构锚固体系梁下土体反力分布规律的试验研究[J].水文地质工程地质,2014,41(3):70-75.
    [3]杨明,胡厚田,卢才金,等.路堑碎石土边坡加固中预应力锚索框架的内力计算[J].岩石力学与工程学报,2002,21(9):1383-1386.
    [4]王苏岩,李海涛.FRP加固钢筋混凝土管道试验研究[J].工程抗震与加固改造,2010,32(5):52-56.
    [5]HOUSSAM Toutanji,SEAN Dempsey.Stress Modeling of Pipelines Strengthened with Advanced Composites Materials[J].Thin-Walled Structure,2001,39:153-165.
    [6]高天宝,杨树标,吴斌.混凝土植筋破坏形态分析[J].工业建筑,2005,35(s1):872-874.
    [7]殷跃平.滑坡钢筋砼格构防治“倒梁法”内力计算研究[J].水文地质工程地质,2005,32(6):52-56.
    [8]周陶.滑坡治理中现浇钢筋砼格构梁与预应力锚索复合结构研究[D].北京:中国地质大学,2006:10-21.
    [9]中国建筑科学研究院.混凝土结构后锚固技术规程:JGJ145-2004[S].北京:中国建筑工业出版社,2005:23-27.
    [10]四川省建筑科学研究院.混凝土结构加固设计规范:GB50367-2006[S].北京:中国建筑工业出版社,2006:15-21.