小半径曲线梁桥支座设置和“支座脱空”分析

On Bearing Arrangement of Small Radius Curved Bridge & Bearing Separation Analysis

小半径曲线梁桥(又称弯桥)已成为现代交通工程中的一种重要桥型。曲线梁桥与直线桥相比,其支反力有曲线外侧变大、内侧变小的倾向,内侧甚至产生负反力,表现为"支座脱空"。通过比较不同支座布置及预设偏心时曲线梁桥的内力、支反力,以期寻找曲线梁桥最优的支座布置方式。

The small radius curved bridge(also known as curved bridge) has become an important bridge type in modern traffic engineering. Compared with the straight bridge type, the reaction force of curved bridge has the trends of the outer bearing force becoming bigger and the inside bearing force becoming smaller, and even the inside bearing will produce negative reaction characterized by bearing separation. In this paper, by comparing the curved beam internal force and reaction force under different bearing arrangement and presetting the eccentricity, the optimal way of bearing arrangement for curved bridge is hoped to be found out in this paper.