温度荷载作用下连续变截面钢箱梁剪力滞效应研究

钢箱梁桥以其良好的结构受力性能在现代桥梁结构中得到广泛的应用，在施工阶段或在运营阶段，箱梁上均存在由温度引起应力过大的现象．采用空间有限元法对大跨连续钢箱梁桥在温度荷载作用及自重作用下的剪力滞效应进行了详细的分析，得出箱梁在温度荷载作用下剪力滞效应的一般规律和初步结论，为掌握该类型结构在温度荷载下的力学特性提供了参考

Study on Shear-lag Effect of Continuous Variable Cross-section Steel Box Girder under Temperature Loading

Steel box girder bridge has been widely used in modem bridge structure for its good structure force performance. During the construction stage or the operational stage, the box girder may be under excessive stress caused by temperature. In this paper, space finite element method is used to do a detailed analysis of the shear-lag effect of the temperature loading and self weight on the large span continuous steel box girder bridge, and a general law and preliminary conclusion of the shear lag effect of box girder under temperature loading are obtained, so as to provide a reference for mastering the mechanical characteristics of this type of structure under the temperature load.