论文部分内容阅读
五里坡特大桥为85 m+4×160 m+85 m预应力混凝土连续刚构桥,其最高主墩墩高153 m,墩高居全国第二。基于超高墩具有的特殊受力和变形特征,考虑钢筋、劲性骨架及混凝土的作用,建立了高墩精细化数值模型,分别采用静力风压荷载和动力冲击风荷载对超高主墩在施工过程中的典型工况进行了安全性分析。结果表明增加的风撑横系梁构造可显著改善高墩的抗风性能,施工阶段全桥应力满足混凝土结构强度要求,施工过程整体抗风性能良好。
The Wulate Bridge is an 85 m + 4 × 160 m + 85 m prestressed concrete continuous rigid frame bridge with the highest piers of 153 m high and the second highest in the country. Based on the special stress and deformation characteristics of ultra-high pier and considering the effect of steel bar, stiffening skeleton and concrete, a numerical model of high-pier refinement was established. The effects of static wind pressure load and dynamic impact wind load on ultra-high main pier In the construction process of the typical conditions for safety analysis. The results show that the increase of the wind-beam cross-beam structure can significantly improve the wind-resistant performance of the high pier, and the full bridge stress of the construction phase can meet the requirements of the concrete structure strength during the construction phase. The overall wind-resistance performance during the construction is good.