高速铁路新开河立交138 m钢箱叠拱桥拱脚受力分析

该文通过工程实例,认为:对于下承式钢箱系杆拱桥来说,拱脚是结构设计的关键部位。其受力性能对全桥承载能力和跨越能力至关重要。在结构构造方面,此处纵肋、横肋、竖肋和横隔板等布置也较为密集,在全桥分析中,对其很难模拟精确。对此,有必要建立局部模型精确模拟局部构造细节,进行分析计算,以了解拱脚处空间局部应力分布规律和大小。

Analysis on Arch Feet Stress of 138-m Steel Box Folded Arched Bridge of Express Railway Xinkaihe Grade Separation

According to the engineering case,the article considers that the arch feet is the key component of the structure design for the through steel box bowstring arched bridge.Its stress performance is extremely important for the bearing capacity and spanning capacity of the whole bridge.The longitudinal rib,transverse rib,vertical rib and cross partition board are arranged more densely in the aspect of structure construction.It is more difficult to simulate accurately in the analysis of the whole bridge.Therefore,it is necessary to set up the partial model for accurately simulating the details of the partial structures and for analyzing and calculating so as to know the partial stress distribution rule and size of the space at the arch feet.