弧形底宽箱梁横向预应力空间作用效应分析

Analysis of Effect of Transverse Prestressed Space Action of Arc Bottom and Wide Box Beam

以上海市中环线工程为工程背景 ,讨论了宽跨比较大的弧形底单箱多室箱梁在横向预应力作用下的受力特性。建立空间有限元模型分析横向预应力的空间效应 ,分别讨论了横梁和顶板中横向预应力对结构的影响 ,得出箱梁横向应力沿结构纵向和横向的分布规律。

Taking Shanghai Medium Ring Road Project as the project background, the paper discusses the forced characteristics of arc bottom and single box, multi cell box beam with greater width span ratio under transverse prestressed action. It also establishes the space finite element module for analyzing transverse prestressed space effect. It discusses respectively the influence of cross beams and the transverse prestressing force in top slabs on the structure so as to obtain the distribution pattern of the transverse stress of box beam in longitudinal and transverse directions along the structure.