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首页> 外文会议>International Association for Bridge and Structural Engineering(IABSE) Symposium; 20040922-24; Shanghai(CN) >Analytical Study and Desing of Double Main Box-Girder Bridge with Sharp Curvature
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Analytical Study and Desing of Double Main Box-Girder Bridge with Sharp Curvature

机译：曲率双主箱梁桥的分析研究与设计

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摘要

For satisfactory design and construction of the current bridge, several analytical studies were carried out and the findings listed below were quantitatively identified. The obtained results were reflected in the design and construction. 1) The impact of crossbeam stiffness and interval on the load distribution effects was identified quantitatively. Changing the crossbeam interval would have a greater influence on the load distribution effects if the mean crossbeam rigidity is the same. 2) The additional stress in the deck panels caused by the relative deformation of the main girder can be obtained with sufficient accuracy through the calculation method using the results of lattice analysis that we proposed. This allows us to design bridges with a more accurate understanding of deck panel stress. 3) It was demonstrated that the style of separated deck panels is desirable for cast-in-situ PC box girders having significant curvature. The use of the separation style can eliminate the effects of additional stress caused by the relative deformation of the main girders. Therefore, it is considered that durability can be assured in double main box-girder bridges having a sharp curvature, which are prone to large relative deformation of the main girder. However, if the style of separated deck panels is adopted, deck panel rigidity effects cannot be expected (not taken into consideration in the design phase) such as in the case of the integrated deck panel style. Such effects are thought to be excess durability of the bridge beams. Consequently, the load-bearing ability of the bridge beams at the ultimate time is greater in a structure of integrated deck panels, and we must determine the required performance of the actual bridge beams mounted in the construction if we plan to adopt a struc ture of separated deck panels.
机译：为了使当前桥梁的设计和施工令人满意，进行了数项分析研究，并对以下列出的发现进行了定量鉴定。获得的结果反映在设计和施工中。 1）定量确定了横梁刚度和间隔对载荷分布效果的影响。如果平均横梁刚度相同，则更改横梁间隔将对载荷分布效果产生更大的影响。 2）通过我们提出的点阵分析结果，通过计算方法可以以足够的精度获得由主梁相对变形引起的甲板面板附加应力。这使我们能够设计出对甲板面板应力有更准确了解的桥梁。 3）已证明，对于具有明显曲率的现浇PC箱形梁，分隔面板的样式是理想的。使用分隔样式可以消除由主梁的相对变形引起的附加应力的影响。因此，认为在具有大曲率的双主箱形梁桥中可以确保耐久性，该双主箱形梁桥容易引起主梁的较大相对变形。但是，如果采用分离式甲板面板的样式，则无法预期甲板面板的刚性效果（在设计阶段未考虑在内），例如在集成甲板面板样式的情况下。这种效果被认为是桥接梁的过度耐久性。因此，在集成甲板面板的结构中，桥梁梁在最终时刻的承重能力更高，如果我们打算采用以下结构，则必须确定安装在结构中的实际桥梁梁的所需性能。分开的甲板面板。

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