吊杆锈蚀对下承式系杆拱桥稳定性的影响研究  

Study of the effect of boom corrosion on the stability of under-supported tied arch bridges

作　　者：柴国贞 Chai Guozhen(Guangdong Communication Planning&Design Institute Group Co.,Ltd.,Guangzhou Guangdong 510507,China)

机构地区：[1]广东省交通规划设计研究院集团股份有限公司,广东广州510507

出　　处：《山西建筑》2023年第20期165-168,共4页Shanxi Architecture

摘　　要：当拱桥吊杆发生锈蚀时,其有效截面会减小,这将导致其承载能力下降。为了研究吊杆锈蚀对拱桥的影响,采用了有效截面模拟并使用Midas Civil建模分析了单对吊杆锈蚀后对吊杆及拱桥整体空间稳定性的影响。研究结果表明,单对吊杆锈蚀后会导致其本身应力显著增加,从而大大增加了其断裂的风险。而其余吊杆仅会发生轻微变化,对拱桥整体应力的影响也很小。When the boom of an arch bridge corrodes,its effective section is reduced,resulting in a reduction in its load carrying capacity.In order to investigate the effect of boom corrosion on arch bridges,this paper uses effective section simulation and Midas Civil modelling to analyse the effect of single pair boom corrosion on the spatial stability of the boom and the arch bridge as a whole.The results show that corrosion of a single pair of spreader bars leads to a significant increase in their own stresses,which greatly increases their risk of failure.The rest of the spreader bars change only slightly and the effect on the overall stresses in the arch bridge is minimal.

关 键 词：吊杆锈蚀 拱桥 稳定性 承载能力 

分 类 号：TU997[建筑科学—市政工程]