四跨一联预应力混凝土连续宽箱梁空间分析

结合上海市中环线虹梅路立交工程对主线四跨一联预应力混凝土连续宽箱梁进行空间分析,得到结构在荷载作用下的剪力滞效应分布规律、截面实际中性轴与平截面假定中性轴的比较、偏载下支座反力的分布规律、挑臂横向挠度、偏载下的偏载系数以及增设跨中横隔板与否对结构受力状态的影响等结论。

Analysis of Space of Prestressed Concrete Continuous Wide Box Bean with Four Spans

Combining Hongmei Road Interchange Project of Shanghai Middle Ring Road, the paper analyzes the space of prestressed concrete continuous wide box beam with four spans of main road to get the conclusion such as shear lag effect distribution rule of the structure under loading action, the comparison between the section actual neutral axle and flat section assumed neutral axle, the distribution rule of support abutment reaction under eccentric load, the transverse deflection of cantilever, eccentric load coefficient under eccentric load and whether to add the diaphragm plate at span center or not influences on the structural forced state.