自锚式悬索与斜拉组合体系桥梁使用阶段模型试验
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition)(2009)
Abstract
为充分了解自锚式悬索与斜拉组合体系桥梁使用阶段的受力性能,以实桥为工程依托,基于相似理论,建立了缩尺比例为1∶20的全桥试验模型,并进行了使用阶段模型试验.分析了自锚式悬索与斜拉组合体系桥梁使用阶段主梁的变形规律、主缆的线形变化特征以及主塔的受力特性.研究结果表明:使用阶段实测模型主塔最大应力增量为2.08 MPa;斜拉区受力变化对悬索区结构影响明显;全桥对称加载主跨跨中挠度比主跨对称加载减小了14.3%.
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Key words
Bridge engineering,Cable-stayed,Composite structure,Finite element model,Model test,Self-anchored suspension,Spatial member
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