基于齿形法的空间桁架结构抗风优化-《郑州大学学报(工学版)》

文章信息/Info

Title:: Analyze on Static-dynamicLoadingDetection，DiseasesandReinfbrce ofaLongSpan ConcreteTrussArch Bridge

作者:: 黄友钦; 王艳萍; 傅继阳; 等.; 广州大学广东省结构安全与健康监测工程技术研究开发中心,广东广州,510006, 广州大学广东省结构安全与健康监测工程技术研究开发中心,广东广州,510006, 广州大学广东省结构安全与健康监测工程技术研究开发中心,广东广州,510006, 广州大学广东省结构安全与健康监测工程技术研究开发中心,广东广州,510006, 广州大学广东省结构安全与健康监测工程技术研究开发中心,广东广州,510006

Author(s):: OU Yao．wenl一; ZHOUChao．yang; 1.School of Civil Engineering，Central South University，ChangSha，410075，China；2．LiuYang industrial town constlllction de— velopment Co．LTD Chanqsha Biomedical Park，41033l，China

摘要:: 目前对风敏感结构的优化方法研究集中于高层建筑结构,很少针对大跨空间结构.准则法是求解多设计变量优化问题的有效方法.首先建立复杂空间桁架结构的抗风优化设计理论和方法,然后以一实际双层柱面网壳结构为研究对象,基于风洞试验数据计算的等效静力风荷载进行优化设计,并讨论了截面积下限、满应力步长等因素对优化结果的影响.研究表明,在所有杆件最大应力不超过初始设计值的条件下,结构总重降低了约48％,通过设定截面积下限不仅保证截面积的合理取值,也使材料性能得到充分利用,进一步降低结构总重.

Abstract:: To assess the 10adingquality of bridges，it is necessary to establish FEM，static loadingexperiment wasdesigned．Stress andstrain parameters such as themaximum horizontal thmst of arch feet(condition 1)，the boom axial force(condition2)，the b唔gest negatiVe momentof arch feet(condition3)，themos卜positiVe bending moment of the main arch ring (condition 4) and longitudinal beam (condition 5) under diff色rent working conditionswere calculated by ANSYS；Modal and dynamicdenection were calculated by Midas．As an example，in the 16thacross，the surveyed vibrationf}equency of the bridge is 12％at aVerage higher than theoretical calculationone，namely the dynamicloading stiffness can’tmeet the design requirements．However，the reinforcementandthe maintenancemustbe put forwardinto．Threekinds ofmethodswerecompared at constmction dimculty，emciency．This mean can be used in similarlong-span bridges both home and abroad for testing and repai“ng reinforcement．