论文部分内容阅读
对高速公路中宽幅空心板梁桥(板宽1.5 m)的上部结构横向拓宽方案进行了分析研究。在高速公路扩建工程中,宽幅空心板梁桥的横向拓宽时,新建桥梁原则上采用宽幅空心板梁结构,但是旧桥宽幅空心板梁在运营使用中产生了诸多结构性病害,拓宽设计时需要研究新建拓宽结构采用普通空心板梁结构的可行性,以此作为一种替代性拓宽方案。对于该替代性方案的可行性采用结构比选方法进行理论分析研究,研究表明替代性拓宽方案是可行的,并在此基础上提出了新建桥梁结构普通空心板梁的设计内力简化计算方法。
The lateral widening scheme of superstructure of wide hollow slab bridge (width of 1.5 m) in expressway is analyzed and studied. In the expansion project of the expressway, when the wide hollow girder bridge is widened horizontally, in principle, the new bridge adopts the wide hollow slab beam structure, but the wide hollow slab beam of the old bridge has many structural diseases during operation and widens When designing, it is necessary to study the feasibility of using the new hollow structure to adopt the common hollow slab beam structure as an alternative widening solution. For the feasibility of this alternative scheme, the method of structural comparison and selection is used to do the theoretical analysis and research. The results show that the alternative broadening scheme is feasible. Based on this, a simplified design method for the design internal force of a new hollow beam with a new bridge structure is proposed.