分离式双主肋截面是由桥面板与边主梁组合而成，由于其施工方便，在大跨度预应力混凝土斜拉桥中得到广泛应用。由于肋板结构中两个边主梁的间距较大，其桥面板除整体受力变形外必然同时产生横向弯曲和纵向不均匀局部变形，此时平面分析已不能得到满意的结果，只有考虑上述变形与整体变形相关作用的非线性空间分析才符合肋板结构主梁斜拉桥的实际工作状况，但有关这方面的研究鲜见公开报道，桥梁工作者急需全面了解其受力特性。
本文以荆州长江公路大桥北汊主航道肋板结构主梁斜拉桥为工程背景，采用空间有限元法，结合大型商用软件ANSYS，建立了全桥三维空间分析模型。建模过程中采用ANSYS提供的参数化设计语言APDL，将虚拟温度荷载法引入其中，使其具备了调整斜拉桥成桥恒载索力的计算功能。该方法能实现调索前后结构分析计算模型的统一，且能方便地考虑调索过程中各种非线性因素的影响。
通过对全桥多工况下空间受力进行分析，得到了索、塔在不同工况下受力的特性以及主梁桥面板应力不均匀分布的状况，结果表明：在桥的塔根、桥跨最外索附近截面及边跨截面突变位置桥面板中的剪力滞效应明显，其他部位剪力滞效应不是很显著。在偏荷载作用下，桥面板横向应力分布不均匀系数沿桥纵向的变化比较大，尤其在边跨截面突变处显得更为明显，在设计时应予以重视。
本文还讨论了运用局部模型法对模型局部区域进行分析时，所选局部区域的大小和边界条件的模拟方法对计算结果的影响，得出了有益结论，为运用局部模型法进行精确分析提供了依据。
其中的专业词汇可用汉语打出来就行了

分离式双主肋截面是由桥面板与边主梁组合而成，由于其施工方便，在大跨度预应力混凝土斜拉桥中得到广泛应用。由于肋板结构中两个边主梁的间距较大，其桥面板除整体受力变形外必然同时产生横向弯曲和纵向不均匀局部变形，此时平面分析已不能得到满意的结果，只有考虑上述变形与整体变形相关作用的非线性空间分析才符合肋板结构主梁斜拉桥的实际工作状况，但有关这方面的研究鲜见公开报道，桥梁工作者急需全面了解其受力特性。
The seperated pair of main ribs section was made up by bridge panel and girder, because its construction is convenient, used widely in the prestressing force concrete cable-stay bridge of large span. Because the intervals of two side girders are relatively large in the structure of the floor, it is not even and some and out of shape that its bridge of panels must be produced at the same time horizontally and crookedly and vertically except deforming wholly, level analyse can receive the satisfied result already at this moment, is it is it accord with floor structure real work state , girder of cable-stay bridge just to analyse with whole out of shape relevant non-linear space of function while being out of shape while being above-mentioned to consider only, but about this research rarely seen to report bridge worker is it understand their receive strength characteristic in an all-round way to need badly publicly.
本文以荆州长江公路大桥北汊主航道肋板结构主梁斜拉桥为工程背景，采用空间有限元法，结合大型商用软件ANSYS，建立了全桥三维空间分析模型。建模过程中采用ANSYS提供的参数化设计语言APDL，将虚拟温度荷载法引入其中，使其具备了调整斜拉桥成桥恒载索力的计算功能。该方法能实现调索前后结构分析计算模型的统一，且能方便地考虑调索过程中各种非线性因素的影响。
This text regards floor structure girder cable-stay bridge of central line of the main channel of north branch of a river of highway bridge of the Changjiang River of Jing Zhou as the project background , adopt the space finite element law, combine the large-scale commercial software ANSYS .Have set up the three-dimensional space of the whole bridge and analysed models. Adopt the parameter that ANSYS offers to design language APDL , load the law of fictitious temperature and introduce among them in the modeling course, enable its possessing and adjusting the cable-stay bridge and becoming the computing function that asks for strength in permanent year in the bridge. Method this can is it transfer structure analyse unity to calculate the model before and after asking for to realize, and can consider transfering and asking for the influence of different non-linear factor of the the course conveniently .
通过对全桥多工况下空间受力进行分析，得到了索、塔在不同工况下受力的特性以及主梁桥面板应力不均匀分布的状况，结果表明：在桥的塔根、桥跨最外索附近截面及边跨截面突变位置桥面板中的剪力滞效应明显，其他部位剪力滞效应不是很显著。在偏荷载作用下，桥面板横向应力分布不均匀系数沿桥纵向的变化比较大，尤其在边跨截面突变处显得更为明显，在设计时应予以重视。
本文还讨论了运用局部模型法对模型局部区域进行分析时，所选局部区域的大小和边界条件的模拟方法对计算结果的影响，得出了有益结论，为运用局部模型法进行精确分析提供了依据。
Through analysing to the space under large operating modes of the whole bridge by strength, get ask for , tower under different operating mode characteristic and main beam bridge panel stress even state that distribute of strength, the result shows : Tower root , bridge in bridge step outermost to ask for nearby section and step to cut strength stagnat obvious effect sectional sudden change position bridge panel, it is not very remarkable to cut the stagnat effect of strength in other position.
In is it load function to lean towards, bridge panel horizontal stress distribute even coefficient along bridge relatively heavy change having vertical, especially in step sectional sudden change office seem more obvious , should be paid attention to in the design. This text is it use some model law go on when analysing to model some area to discuss also, the impacts on result of calculation of simulation method of the size of some area and border condition selected, have draw the conclusion of benefitting, has offered basis on which use the law of some model and carry on accurate analysis.