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时间:2020-06-01
《应县木塔精细化结构建模及水平受力性能分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第34卷第9期2013年9月JournalofBuildin~StructuresVo1.34No.9Seo.2013文章编号:1000—6869(2013)09—0150—09应县木塔精细化结构建模及水平受力性能分析陈志勇,祝恩淳,潘景龙’(1.哈尔滨工业大学,黑龙江哈尔滨150090;2.新布伦瑞克大学,新不伦瑞克弗雷德里克顿E3B5A3)摘要:结合现场调查,对应县木塔进行结构体系分析、精细化建模、动力特性和水平受力性能分析。分析表明,应县木塔为“层叠平台式梁柱结构”体系。使用梁一短柱单元组模拟斗棋,刚度等效单元模
2、拟梁柱及柱脚节点,建立了木塔的理想和现状精细化模型进行分析。结果表明,土磬墙对第1明层有嵌固作用,故木塔第1层侧移呈弯曲型而其它各层主要呈剪切型;明层铺作、暗层柱架、暗层铺作和明层柱架的抗侧移刚度依次减少,现状模型抗侧移刚度比理想模型平均低33%;多遇地震作用下,木塔部分明层柱架侧移角超过了弹性层间位移角限值;基于木塔柱脚连接特点,提出使用“重力抗倾覆力矩与倾覆力矩之比”作为木塔倾覆评判准则,多遇地震作用下木塔无倾覆危险,但在罕遇地震作用下则可能倾覆。关键词:应县木塔;木结构;精细化有限元分析模型;受力性能;地震响应;
3、安全评估中图分类号:TU366.2TU311.41文献标志码:ALateralstructuralperformanceofYingxianWoodPagodabasedoOnrefIi1nedFEmoadelsCHENZhiyong一,ZHUEnchun,PANJinglong‘(1.HarbinInstituteofTechnology,Harbin150090,China;2.UniversityofNewBrunswick,FrederictonE3B5A3,Canada)Abstract:Thispaperp
4、resentsthestructuralsystemanalysis,refinedFEmodelling,dynamiccharacteristicsandlateralstructuralperformanceanalysisofYingxianWoodPagoda.Thepagodacanberegardedasalayeredplatformbeam—columnstructure.TworefinedFEmodelsofthestructureofYingxianWoodPagodawithandwithou
5、tconsideringdamageweredevelopedbasedonABAQUSplatform,respectively,inwhichtheDou—Gongwasmodeledwithbeam—short—columnassemblyandthecolumn—framejointsweresimulatedwithstiffness—equivalentelements.Thelateraldriftofthe1ststoryofthepagodaappearedasbendingtypewhilethos
6、eofotherstoriesshowedasshearingtype,sincethemudwallstren~henedthecolumnframesofthe1ststory.ThelateralstiffnessofthePu—ZHOlayersintheapparentstories,thecolumn—framesinhiddenstories,thePu—ZUOlayersinhiddenstoriesandthecolumn—framesinexposedstoriesdecreased,sequent
7、ially.Thelateralstiffnessofthepagodamodelwithconsideringdamagewasaveragely33%lowerthanthoseofthepagodamodelwithoutconsideringdamage.Underthefrequentearthquake,thelateraldriftratiosofseveralapparentstoriesexceedtheelasticinter-storydriftratiolimit.Anindexforevalu
8、atingtheoverturningofthepagodawassuggested,andthesafetyofYingxianWoodPagodaunderearthquakeswasassessed.AlthoughYingxianWoodPagodahasnotoverturnedunderthefrequentearth
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