九江长江大桥主桥公路桥改造设计

发布时间：2018-05-16 16:26

本文选题：公路铁路两用桥 + 公路桥面系　；参考：《桥梁建设》2017年01期

【摘要】：针对九江长江大桥主桥公路桥存在的两方面问题(原设计标准低于现在的运营要求;桥面系结构出现的病害使整个结构存在安全隐患且影响结构的耐久性),分析病害原因并进行结构检测评估,在此基础上提出加固改造方案。在不改变原有结构受力体系的前提下,采用较轻的正交异性钢桥面板整体更换原公路桥面系,所有纵向构件全联连续,取消原桥一联中间设置的小型伸缩缝;将原横梁加劲板的上、下两端分别与横梁的上、下翼缘固定,同时在原加劲板两侧增设加劲板改善支座附近横梁腹板的受力状况;对原公路托架采取安装新增构件和更换部分节点板及杆件的措施进行加固。改造方案提升了公路桥的技术标准,并且修复了存在的病害。
[Abstract]:Aiming at the two problems existing in Jiujiang Changjiang River Bridge main Bridge Highway Bridge (the original design standard is lower than the present operation requirement; The damage of bridge deck system makes the whole structure have hidden danger of safety and affects the durability of the structure. The causes of the disease are analyzed and the structural inspection and evaluation are carried out. On the basis of this, the scheme of reinforcement and reconstruction is put forward. On the premise of not changing the original structural stress system, the original highway deck system is replaced by the light orthotropic steel bridge face slab, and all longitudinal members are connected continuously, and the small expansion joint set in the middle of the original bridge is eliminated. The upper and lower ends of the original beam stiffener plate are fixed with the upper and lower flange of the beam respectively, and at the same time, the stiffening plate is added on both sides of the original stiffening plate to improve the stress condition of the web plate near the support; The original highway bracket should be strengthened by installing additional members and replacing some joint plates and bars. The reconstruction scheme raised the technical standard of the highway bridge and repaired the existing diseases.
【作者单位】：中铁大桥勘测设计院集团有限公司;中铁大桥(南京)桥隧诊治有限公司;
【分类号】：U445.6

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