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ID:52400673
大小:1.42 MB
页数:5页
时间:2020-03-27
《三角形挂篮和菱形挂篮有限元对比分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷,第1期公路工程Vol.42,No.12017年2月HighwayEngineeringFeb.,2017三角形挂篮和菱形挂篮有限元对比分析方淑君,杨耀,阮翔,江州(中南大学土木工程学院,湖南长沙410075)[摘要]随着上跨既有线施工的新建铁路项目的增多,挂篮悬臂施工方法工程经验和理论验算变得十分重要,为同类工程提供参考。结合京沈客专下桃花吐连续梁桥和铁营子连续梁桥的悬臂浇筑工法,基于MidasCivil软件平台,采用数值分析方法对三角形挂篮和菱形挂篮进行有限元计算,对比分析了两种挂篮的刚度、强度和整体稳定性。研究结果表明:模型理论变形值与预压试验变形值十分接
2、近,建模方法较为准确;三角形挂篮的整体刚度优于菱形挂篮,施工荷载下变形较小;菱形挂篮的一阶屈曲稳定系数约为三角形挂篮的2倍,菱形挂篮的稳定性优于三角形挂篮;就桁架和横梁的受力而言,菱形挂篮优于三角形挂篮。[关键词]三角形挂篮;菱形挂篮;悬臂浇筑;预压试验;对比分析[中图分类号]U446[文献标识码]A[文章编号]1674—0610(2017)01—0055—05ComparativeAnalysisofTriangleandRhombicHangingBasketBasedFiniteElementMethodFANGShujun,YANGYao,RUANXiang,J
3、IANGZhou(SchoolofEngineeringandArchitecture,CentralSouthUniversity,Changsha,Hunan410075,China)[Abstract]Astheincreaseofconstructionprojectsaboutproposednewrailwaycrossingexistingline,theengineeringexperienceandtheoreticalcalculationofcantileverconstructionmethodwithhangingbasketonexistin
4、gprojectsbecomeshighlyimportant,whichprovidesreferenceforthesimilarengineeringAccordingtotheengineeringofXiaTaoHuaTuandTieYingZicontinuousbeambridgeinBeijingShenyangpassengerdedicatedline,basedonthesoftwareplatformofMidasCivil,thisarticlecalculatesandcomparativelyanalyzesthestiff
5、ness,intensityandwholestabilityofTriangleandrhombichangingbasketbyusingthenumericalanalysismethodTheresultsshowthat:ThedeformationvalueoftheFEMmodelisveryclosetothedeformationoftheprecompressionexperiment,andthemodelingmethodisextremelyaccurate;Theoverallstiffnessofthetrianglehangingb
6、asketisbetterthanthatoftherhombichangingbasket,andthedeformationissmallunderconstructionload;Thefirstorderbucklingcoefficientoftherhombichangingbasketisabout2timesthatofthetrianglehangingbasket,andthestabilityoftherhombichangingbasketisbetterthanthatofthetriangle;Inthecaseoftheforceont
7、russandbeam,therhombichangingbasketisbetterthanthetrianglehangingbasket[Keywords]trianglehangingbasket;rhombichangingbasket;cantilevercasting;precompressionexperiment;comparativeanalysis段截面中心线处梁高4835m,梁底下缘按二次抛1工程概况物线变化,边支座中心线至梁端075m,梁缝分界本文以京沈客专辽宁段TJ-6标下桃花吐连续线至梁端010m
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