公路工程钢混叠合梁斜拉桥主梁施工优化研究

Research on Construction Optimization of Main Beam of Steel-Concrete Composite Beam Cable Stayed Bridge of Highway Engineering

针对当前叠合梁斜拉桥的施工过程复杂,成本高昂的问题,论文通过有限元仿真模型对钢混叠合梁斜拉桥进行了有限元模拟分析,并提出了3段式循环施工方案,通过同时浇筑3个湿接缝的方式节省施工和维护时间。试验结果表明,在3段式循环施工方案下,叠合梁斜拉桥钢主梁最大拉伸应力为81.46 MPa,最大压缩应力为-231.35 MPa,均没有超过标准规定的允许值。同时,施工过程中缆绳索力与合理完工状态下的索力最大差距仅有-1.42%,满足标准要求。

In response to the complex construction process and high cost of the current composite beam cable-stayed bridge,this study conducted finite element simulation analysis on the steel-concrete composite beam cable-stayed bridge through a finite element simulation model,and proposed a three-stage cyclic construction scheme.By pouring three wet joints simultaneously,construction and maintenance time can be saved.The experimental results show that under the three-stage cyclic construction scheme,the maximum tensile stress of the steel main beam of the composite beam cable-stayed bridge is 81.46 MPa,and the maximum compressive stress is-231.35 MPa,both of which do not exceed the allowable values specified in the standard.Meanwhile,the maximum difference between the cable tension during the construction process and the reasonable completion state is only-1.42%,which meets the standard requirements.