高速铁路钢管混凝土系杆拱桥的受力性能分析

ANALYSIS OF THE FORCE PERFORMANCE OF HIGH-SPEED RAILROAD STEEL PIPE CONCRETETIED ARCH BRIDGE

为探讨一座高速铁路钢管混凝土系杆拱桥的力学变形规律。通过有限元计算软件对桥梁进行离散研究,构建出有限元架构模型。在多种荷载组合下,对主梁和拱肋进行受力性能分析,以桥梁截面正应力表示梁的受力情况。得出桥梁左右墩处以及桥梁中间部位截面应力较大,拱肋钢管在拱脚附近受力较大,为最不利位置,而拱顶部位较为安全。研究发现桥梁的设计合理,但受力变形规律需要特别关注,特别是在桥梁左右墩处、桥梁中间部位和拱脚处。

This paper studies the force performance and force-deformation law of a high-speed steel pipe and con⁃crete tied arch bridge.The bridge's finite element architecture model is established and the main beam and arch ribs under various load combinations are analysed.The results show that the stresses in the left and right piers and the middle part of the bridge are higher,and the steel tube of the arch rib is subjected to higher stresses near the foot of the arch.The top part of the arch is safer than others.The design of the bridge is reasonable,but its force deforma⁃tion pattern needs to be paid special attention,especially at the left and right piers,the middle part of the bridge,and the foot of the arch.