同向回转拉索锚固体系基准圆筒定位法

《同向回转拉索锚固体系基准圆筒定位法》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、桥梁建设2015年第45卷第2期(总第231期)BridgeConstruction，Vo1．45，No．2，2015(TotallyNo．231)83文章编号：1003—4722(2015)02～0083—06同向回转拉索锚固体系基准圆筒定位法胡可(安徽省交通投资集团有限责任公司，安徽合肥230088)摘要：斜拉桥采用新型同向回转拉索体系，在机理上实现了索塔的无拉应力锚索。为解决同向回转拉索的定位问题，进一步推进技术的实用化，提出拉索的基准圆筒定位法。设想拉索绕过一个与索塔同轴的虚拟圆筒，垂度面与基准圆筒相切，形成一条位

2、置固定的竖直切线，由此构成定位计算的基准。定位以已知设计条件为主控参数和调控目标，根据结构设计特点，选择与主控参数关联性强的待定参数进行调控，设定调控的先后次序，建立参数之间的几何、力学关系，通过循环计算，达到计算结果与控制目标的吻合，从而实现问题的系统化解决。将定位的方法和过程编制为定位计算模块，嵌入拉索设计程序，应用于芜湖长江二桥，结果表明该方法可实现对同向回转拉索的理想定位。关键词：斜拉桥；同向回转拉索；同向回转鞍座；无拉应力锚索；基准圆筒定位法；定位计算模块中图分类号：U448．27；U442文献标志码：ARefe

3、renceCylinderLocatingMethodforIs0directi0nallyTurningStayCableAnchorSystemHUKe(AnhuiTransportationInvestmentGroupCo．，Ltd．，Hefei230088，China)Abstract：Byapplyingthenewtypeoftheisodirectiona1lyturningstaycablesystemtocable～stayedbridge，thestaycablesatthepylonofthebri

4、dgecanbeanchoredwithnotensilestressinpointofmechanism．TosolvetheproblemoflocatingtheisodirectionaIlyturningstaycablesandtomakethetechniquesrelatedtothestaycablesmorepractical，areferencecylinderlocatingmethodforthestaycableswasputforward．Thestaycableswereassumedtot

5、urnaroundavirtualcylinderthathadthesameaxlewiththatofthepylonandtheperpendicularityplaneofthestaycableswasassumedtotouchthecylinder，averticaltangentlineoffixedlocationwashenceformedandthetangentlinecouldcontributethereferenceforcomputingthelocatingofthestaycables．

6、Thegivendesignconditionsofthebridgeweretakenasthemajorcontrolparametersandcontroltarget．Inaccordancewiththestructura1designcharacteristics。theundeterminedparametersthatwereclose—lyassociatedwiththemajorcontrolparameterswereselectedandcontrolled．thecontro1sequencew

7、assetandthegeometricandmechanicaIrelationsamongtheparameterswereestablished．Byre-peatedcomputation，thecoincidenceofthecomputationwiththecontroltargetwasachievedandtheproblemoflocatingthestaycableswasaccordinglysystematicallysolved．Thereferencecylin—derlocatingmeth

8、odandlocatingprocesswerecompiledasalocatingcomputationmodulus，werebuiltintothestaycabledesignprogramandappliedtotheSecondWuhuChangjiangRiverBridge．There