資源描述：
《預(yù)應(yīng)力錨索荷載傳遞與錨固效應(yīng)計(jì)算》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第42卷第2期中南大學(xué)學(xué)報(bào)(自然科學(xué)版)Vol.42No.22011年2月JournalofCentralSouthUniversity(ScienceandTechnology)Feb.2011預(yù)應(yīng)力錨索荷載傳遞與錨固效應(yīng)計(jì)算1,2332鄧宗偉，冷伍明，鄒金鋒，唐葭(1.中南大學(xué)資源與安全工程學(xué)院湖南長(zhǎng)沙，410083；2.湖南城市學(xué)院土木工程學(xué)院，湖南益陽(yáng)，413000；3.中南大學(xué)土木建筑學(xué)院湖南長(zhǎng)沙，410075)摘要：考慮巖體的損傷特性，根據(jù)剪切位移法，推導(dǎo)錨固段側(cè)摩阻力沿錨固長(zhǎng)度的非線性分布計(jì)算公式；結(jié)合該公式和Mindlin解，推導(dǎo)出錨固巖體影響范
2、圍內(nèi)任一點(diǎn)的應(yīng)力分布解析解，并以具體例子進(jìn)行計(jì)算分析。研究結(jié)果表明：錨索在錨固段的應(yīng)力分布主要集中在前端1/3處，比傳統(tǒng)方法計(jì)算的結(jié)果更集中；為提高錨固的效果不能一味增加錨固段長(zhǎng)度，而應(yīng)增加有效的錨固面積或分散前端的集中應(yīng)力；錨索的設(shè)計(jì)參數(shù)中,相鄰錨索之間相互影響的最小距離應(yīng)以正應(yīng)力為標(biāo)準(zhǔn)進(jìn)行控制，而錨固力則應(yīng)以剪應(yīng)力為標(biāo)準(zhǔn)進(jìn)行控制；隨著錨索拉力的增加，在錨固段應(yīng)力影響范圍增加較小，但應(yīng)力集中程度增加較大，因此，錨索設(shè)計(jì)時(shí)不但要考慮錨索與錨固體的黏結(jié)強(qiáng)度，更要考慮錨固體與巖土體的黏結(jié)強(qiáng)度。關(guān)鍵詞：預(yù)應(yīng)力錨索；非線性分布；Mindlin解；荷載傳遞；錨固效應(yīng)中圖分
3、類號(hào)：TU398文獻(xiàn)標(biāo)志碼：A文章編號(hào)：1672?7207(2011)02?0501?07Calculationofpre-stresscabletransferenceofloadandeffectofanchor1,2332DENGZong-wei,LENGWu-ming,ZOUJin-feng,TANGJia(1.SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,Changsha410083,China;2.SchoolofCivilandEngineering,HunanCityUn
4、iversity,Yiyang413000,China;3.SchoolofCivilEngineeringandArchitecture,CentralSouthUniversity,Changsha410075,China)Abstract:Basedonsheardisplacementmethod,consideringthedamagecharacteristicofrockmass,thenonlineardistributioncalculationformulaoflateralfrictionalongtheanchoragelengthwas
5、deduced.CombiningthisformulawithMindlinsolution,theanalyticsolutionofstressdistributioninanchoringrockmasswasdeduced.Takingadvantageofthisanalyticalsolution,thespecificexampleswerecalculatedandanalyzed.Theresultsshowthattheanchorsection'sstressdistributionmainlyconcentratesinthefront
6、end1/3ofcable,anditismorecentralizedthantheclassicalapproach.Insteadofincreasingthelengthofanchoringcable,increasingtheanchoringareaordispersingthefrontendcentralizedstresscanenhancetheanchoringeffect.Inanchorcable’sdesignvariable,theneighboringanchorcablemutualinfluence’sminimumrang
7、eshouldtakethenormalstressasastandardtocontrol,buttheanchorageforceshouldtaketheshearingstressasastandardtocontrol.Withtheincreaseofcabletensileforce,intheanchorsection,therangeofinfluenceofstressincreaseslessthanstressconcentrationdegree.Therefore,theinterface’sbondstrengthbetweenan
8、choringmassa
