138m钢箱叠拱桥耳板锚固结构应力分析
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摘要
钢箱叠拱桥耳板锚固结构构造较复杂,受力集中,是控制设计的关键部位,对哈大铁路客运专线新开河特大桥1-138 m钢箱叠拱桥通过弹性力学解析法、模型试验法、有限元分析法研究耳板锚固结构的应力分布规律,分析耳板应力,其最大点位于销孔上缘,耳板下部远离销孔区域应力依次递减。可以通过加焊圆盘钢板降低销孔附近应力值,同时应当重视加焊圆盘钢板下焊趾处的设计。
With complicated mechanical composition and concentrated stresses,the ear-plate anchorage structure of steel-box superimposed arch bridge is a key part which dominates the design.This paper was based on the 1-138 m steel-box superimposed arch bridge,a super major bridge over the Xinkai River.In this paper the stress distributions of the ear-plate anchorage structure and the ear-plate were researched by using elastic mechanics analysis method,model test method and finite element analysis method.The research results show that the maximum stress will appear in the top edge of pin hole; the stresses will decrease progressively along the ear-plate's lower part away from the pin hole.It is suggested in this paperthat the stresses around the pin hole can be decreased by additional welded disc plates; and at the same time,more attentions should be paid to the design of the lower weld toes of the additional welded disc plates.
With complicated mechanical composition and concentrated stresses,the ear-plate anchorage structure of steel-box superimposed arch bridge is a key part which dominates the design.This paper was based on the 1-138 m steel-box superimposed arch bridge,a super major bridge over the Xinkai River.In this paper the stress distributions of the ear-plate anchorage structure and the ear-plate were researched by using elastic mechanics analysis method,model test method and finite element analysis method.The research results show that the maximum stress will appear in the top edge of pin hole; the stresses will decrease progressively along the ear-plate's lower part away from the pin hole.It is suggested in this paperthat the stresses around the pin hole can be decreased by additional welded disc plates; and at the same time,more attentions should be paid to the design of the lower weld toes of the additional welded disc plates.
引文
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[2]刘彦明.大跨度钢箱叠拱桥实体圆钢吊杆疲劳试验研究[J].兰州交通大学学报,2010(3):7-11.
[3]赵世运,张先军,石刚强.严寒地区高速铁路关键施工技术综述[J].铁道标准设计,2012(5):1-10.
[4]杨正华.哈大铁路客运专线新开河大桥138 m钢箱叠拱过运架设备施工检算[J].铁道标准设计,2012(5):93-95.
[5]郝良秋,赵亚楠.哈大铁路客运专线新开河特大桥138 m钢箱叠拱桥“先梁后拱”施工技术[J].铁道标准设计,2012(5):109-112.
[6]李娜娜,石现峰,许宏伟.销连接受力特性的数值仿真[J].石家庄铁道学院学报:自然科学版,2007(12):104-107.
[7]狄瑾,周绪红,游金兰,张茜.钢箱梁斜拉桥索塔锚固区的受力性能[J].中国公路学报,2007(7):48-52.
[8]王少怀.向中富.谢秉敏.赵军.斜拉桥耳板式索梁锚固区应力分析[J].重庆交通大学学报,2012(8):751-754.
[9]刘庆宽,强士中,张强,陈伟庆.斜拉桥耳板索梁锚固结构受力特性研究[J].中国公路学报,2002(1):72-75.
[10]卫星,强士中.斜拉桥耳板式索梁锚固结构的空间分析[J].中国铁道科学,2004(5):67-71.
[11]中华人民共和国铁道部.TB10002.1—2005铁路桥涵设计基本规范[S].北京:中国铁道出版社,2005.
[12]中华人民共和国铁道部.TB10020—2009高速铁路设计规范[S].北京:中国铁道出版社,2009.