斜向索力作用下桁架式扣塔的钢锚箱受力性能

发布时间：2018-06-23 02:24

本文选题：桁架式扣塔 + 钢锚箱　；参考：《公路工程》2014年06期

【摘要】：相对于一般的钢锚箱而言,拱桥扣塔的钢锚箱与斜拉桥和悬索桥的钢锚箱的受力不同,斜拉桥的钢锚箱四周有钢或混凝土构件连接支承,而扣塔的钢锚箱只有扣塔桁架构件与之相连,连接构件相对较少,其受力性能直接关系到拱桥施工安全。合江长江大桥的扣塔钢锚箱具有构造复杂,扣索索力大,且与扣塔的主弦杆焊接在一起受力等特点。合江长江一桥扣塔的钢锚箱有限元分析结果表明,在拱肋吊装过程中的最不利扣索力工况下,钢锚箱的锚下应力相对较大,但应力衰减较快,随着远离应力集中区,应力迅速降至较低水平。钢锚箱性能满足使用要求,构造合理、传力途径明确、结构受力安全,可为分析和设计同类构造形式提供参考。
[Abstract]:Compared with the normal steel anchor box, the steel anchor box of the arch bridge buckle tower is different from the steel anchor box of the cable-stayed bridge and suspension bridge. The steel anchor box of the cable-stayed bridge is supported by steel or concrete members. The steel anchor box of the buckling tower is only connected with the steel anchor box and the connecting members are relatively few. The mechanical performance of the steel anchor box is directly related to the construction safety of the arch bridge. The steel anchor box of Hejiang Yangtze River Bridge has the characteristics of complicated structure, large cable force and welding force with the main chord of the buckling tower. The finite element analysis results of steel anchor box of the first bridge of Hejiang Changjiang River show that under the most unfavorable cable buckling force condition during hoisting of arch rib, the stress under anchor of steel anchor box is relatively large, but the stress attenuation is faster, and with the distance from the stress concentration area, The stress rapidly dropped to a lower level. The performance of the steel anchor box meets the requirements of use, the structure is reasonable, the way of force transfer is clear, and the structure is safe, which can be used as a reference for the analysis and design of similar structural forms.
【作者单位】：重庆交通大学山区桥梁与隧道工程省部共建国家重点实验室培育基地;重庆交通大学山区桥梁结构与材料教育部工程研究中心;重庆市建筑科学院;
【基金】：国家973计划前期研究专项课题(2012CB723305) 浙江省公路管理局科研项目(2011H41) 重庆市教委科学技术研究项目(KJ110412和KJ110416) 山区桥梁与隧道工程国家重点实验室培育基地开放基金项目(CQSLBF-Z12-2,CQSLBF-Y11-7和CQSLBF-Y10-6)
【分类号】：U441;U448.22

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