空心板简支梁桥无缝连续化改造支座选择优化分析

Optimization analysis of bearing selection in the continuous transformation on simply supported hollow slab bridge

针对福建漳州十里桥(空心板简支梁桥)的连续化改造,在全面考虑受力状况下,对单、双支座模式的选取进行分析.通过运用力学原理和有限元模型分析,并利用数学建模层次分析法(AHP),对漳州十里桥从荷载效应、温度效应、施工条件和地质条件四个结构层次进行简支连续化后支座选择的优化分析.结果表明:简支连续化改造工程中,双支座模式要比单支座模式受力更加合理.

Take Shili bridge in Zhangzhou, Fujian, as an example, the selection analysis between double or single bearing was analyzed considering all possible load cases during its retrofitting of seamlessness and continuity from simply - supported origin. By means of mechanics and finite element model （FEM） analysis, as well as mathematical modelanalytic hierarchy process （AHP）, an opumization analysis of bearing selection for that kind of retrofitted bridge was taken based on four structural hierarchies from loading effect, thermal effect, construction condition and geological situation. The result shows that double bearing is more reasonable than single one for that kind of bridge retrofit- ting of seamlessness and continuity.