低温建筑技术-结构工程Dec.2022No.294DOI：10.13905/j.cnki.dwjz.2022.12.027基于转体阶段的斜拉桥地震易损性研究ONTHESEISMICVULNERABILITYOFCABLE-STAYEDBRIDGEBASEDONSWIVELCONSTRUCTIONSTAGE于海涛1，张海鹰1，王晓东1，孙全胜2（1.黑龙江省公路工程监理咨询有限公司，哈尔滨150007；2.东北林业大学土木工程学院，哈尔滨150040）YUHaitao1,ZHANGHaiying1,WANGXiaodong1,SUNQuansheng2（1.HeilongjiangHighwayEngineeringSupervision&ConsultingCo.,Ltd.,Harbin150007,China;2.CollegeofCivilEngineering,NortheastForestryUniversity,Harbin150040,China）【摘要】文中以黑龙江某转体斜拉桥施工为依托，研究转体斜拉桥施工转体过程的地震易损性。标定构件损伤指标，建立斜拉桥转体结构的有限元模型，对主塔和斜拉索构件进行易损部位识别和增量动力分析，据损伤概率计算公式，绘制转体阶段构件和系统的易损性曲线。结果表明，在同等地震强度下，主塔易损截面各级损伤超越概率对横桥向地震作用更敏感，易损斜拉索则对纵桥向地震作用更敏感；在损伤概率相同的前提下，相比于构件，系统所需的地震动强度至多可降低0.35g；在地震强度相同的前提下，系统损伤概率比构件损伤概率最多可提高6.6%。为斜拉桥转体阶段抗震设计提供依据。【关键词】转体斜拉桥；地震；易损性分析；系统损伤【中图分类号】TU312【文献标志码】A【文章编号】1001-6864（2022）12-0124-05Abstract：Basedontheconstructionofaswivelcable-stayedbridgeinHeilongjiangProvince,theseismicvulnera⁃bilityoftheconstructionstageofaswivelcable-stayedbridgeisstudied.Thedamagecalibrationofcable-stayedbridgecomponentsiscarriedout,andthefiniteelementmodeloftheswivelstructureofthecable-stayedbridgeisestablishedtoidentifythevulnerablepartsofthemaintowerandcableswiththeincrementaldynamicanalysis.Accordingtothecalculationformulaofdamageprobability,thevulnerabilitycurvesofthecomponentsandthesys⁃temintherotatingstageareobtained.Theresultsshowthatwhentheseismicintensityisthesame,thedamageex⁃ceedanceprobabilityofthevulnerablesectionofthemaintowerissensitivetotheseismicactionofthetransverse,whilethevulnerablecableissensitivetothelongitudinalseismicaction.Onthepremiseofthesamedamageproba⁃bility,therequiredseismicintensityoft...
