分阶段施工合成斜箱梁的模型试验研究

以广东省某一斜箱梁桥为工程背景,提出分阶段施工合成箱梁结构的施工方式,并对此施工方式的箱梁桥和整体浇注的箱梁桥进行模型试验研究。通过各种工况的试验加载,并对实测得到的试验数据进行数理统计分析,定量比较了两者的受力性能方面的差异,得到可用于工程实践的若干结论。同时,分析了试验荷载与实桥计算荷载之间的关系。研究结果有助于此类施工方式的箱梁桥在工程设计中的推广与应用。

Model Test Study of Assembled Skew Box Girder Constructed by Stages

Backgrounded by a skew box girder bridge in Guangdong Province,the method for construction of assembled skew box girder structure by stages is put forward and the model test study is made for the box girders constructed by the method and by the integrally casting method.Through testing of the girders under different loading cases and analysis of data obtained from the test study by mathematical statistics,the differences of the structural behavior of the girders constructed by both the methods are quantitatively compared and some conclusions that can be put in use in construction have been generalized.In addition,the relations between the test loads and calculated loads of the girders of actual bridge are analyzed.The results of the study in the paper are helpful to the popularization and application of the assembled box girders constructed by stages in bridge design.