采用摩擦摆减隔震支座系杆拱桥抗震性能分析

Analysis on Seismic Performance of Bowstring Arch Bridge Using Friction Pendulum Isolation Bearing

随着系杆拱桥的大量建设,研究其在地震高烈度区的抗震性能具有重要的工程应用价值。现以工程实际中一座跨度105 m的系杆拱桥为背景,通过非线性时程分析方法,计算分析了其在强震作用下采用摩擦摆减隔震支座后的减隔震效果。分析研究表明,在强震作用下,系杆拱桥采用摩擦摆减隔震支座后,可有效地降低系杆拱桥纵桥向固定墩的地震响应和横桥向各墩的地震响应,有效地防止强震作用下结构的破坏,为结构优化带来较大空间。

With the great construction of bowstring arch bridge, the article studies its important engineering application value of seismic performance in the high earthquake intensity region. Taking a 105m-span bowstring arch bridge in the engineering practice as the background, the article calculates and analyzes its reducing isolation effect in the strong earthquake after using the friction pendulum isolation bearing. The analysis and study show that it can efficiently reduce the earthquake responses of longitudinal fixed piers and horizontal piers of bowstring arch bridge used of friction pendulum isolation bearing, which can efficiently prevent the structure from the damage in the strong earthquake and bring the larger space for the optimization of structure.