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ID:36504814
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时间:2019-05-11
《复合加筋格宾挡墙不同加筋方式数值模拟研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第36卷,第6期公路工程Vo1.36,No.62011年12月HighwayEngineeringDec.,2011复合加筋格宾挡:暗不同加筋方式数值模拟研究丁立,黄向京,林伟平。(1.路港集团有限公司,浙江温州325014;2.湖南省交通规划勘察设计院,湖南长沙410008;3.湖南省公路建设投资有限公司,湖南长沙410007)[摘要]介绍了复合加筋格宾挡墙的单元组成及结构形式。采用FLAC深入研究了复合加筋格宾挡墙的力学响应,探讨了不同面板形式、不同加筋方式时墙面侧向变形和筋材拉力的分布规律,提出了复合加筋的最佳加筋方式。研究结
2、果表明:加筋方式对面墙侧向位移的影响较大,交替加筋比分组加筋有更小的面墙侧向位移;保持加筋间距不变而减小加筋刚度比增大加筋层间距而增大筋材刚度更可取;在交替加筋的同时沿墙高适当减小加筋刚度可节省筋材费用。面墙形式、筋材布置方式对筋材拉力的大小和分布形式有重要影响。【关键词】复合加筋格宾挡墙;FLAC有限差分程序;侧向位移;筋材拉力[中图分类号]U417.11[文献标识码]A[文章编号】1674—0610(2011)06—0037—06Numericalsimulationstudyonthecompoundreinforcedgab
3、ionretainingwallofdiferentreinforcingmethodsDINGLi,HUANGXiangjing,LINWeiping(1.ChinaLugangGroup,Wenzhou,Zhejiang325014,Chiha;2.DesignInstituteofTrafficPlanningandSurveyofHunanProvince,Changsha,Hunan410008,China;3.HunanHighwayConstactionIn—vestmentCo.,LTD.Changsha,Hunan
4、410007,China)[Abstract]Theunitcompositionandstructureofthecompositereinforcedgabionretainingwallisintroduced.WiththeuseofFLAC,thecompositemechanicalresponseofreinforcedgabionretainingwallisdeeplystudied,thedistributionofthelateralwalldeformationandtensilereinforcement,
5、whenapplyingdifferentpaneltypesanddifferentreinforcementmethods,isdiscussed,andthethebestreinforcedcorn-positereinforcedwayisputforward.Theresulthasshownthat:thereinforcementmethodsplaysagreatimpactonthewalloflateraldisplacemen,theturnreinforcedhasasmallwallreinforcedl
6、ateraldisplace-mentthanthescoregroup.Insteadofreducingthestiffnessofreinforced,maitainingthesamedistancere-inforeddistanceismorepreferablethanincreasingreiforcementstillnesswithincreasingthespacebe—tweenreinforcedlayers.Alongthewall,withreducingthestiffnessofthereinfor
7、cementappropriatelywhileinturnreinforced,reinforcementcostI‘Ssaved.Wallformsandreinforcementlayouthaveagreatinfluenceonthesizeandthedistributionofthetensionreinforcement.[Keywords]Compositereinforcedgabionretainingwall;FinitedifferencecodeFLAC;Lateraldis-placement;Tens
8、ionreinforcement大多采用筋材密间距布置的方式,造成筋材费用较1概述高,约占总投资的25%一50%。这一方面是由于国加筋土结构由于具有造价低廉,施工方便、生态内生产的加筋材料如土工格栅,强度还比较低效果好等工程特性,在我
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