关于朱彰线北绕阳河大桥上部拱肋设计变更的技术论证

Technical Demonstrution of upper arch rib Change Desig about North Rao yang river Bridge in the Zhu Zhang Route

通过北绕阳河大桥的设计变更，可看出在新建桥或旧桥加宽改造中，套用标准图时，可根据桥梁断面尺寸的不同，经过分析研究，并对上部各部位进行力学验算。在满足使用要求的条件下，充分挖掘标准图中的内在潜力，以充分发挥材料的性能，达到最大程度的降低成本。创造最佳设计效益。

Through change design of Bei Rao yang river bridge,it is showed that the uper structure Can be checked in mechanics according to different Section Size of bridge,by analysis and study,when the standard drawing was adopted during the Construction to widen and reform existing bridge,under the Condition of meeting use,inner potentialities of the standard drawing will be tapped fully,to bring material performance into play,and to be up to greatest extent to decrease cost,and select the best design benefit. W