满足高铁桥梁双重性能需求的新型减震装置研发及力学性能研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (15) : 245-251.

论文

李雪红，孙磊，徐秀丽，王蕊

作者信息 +

Mechanical performance of new isolation device developed to meet dual-performance requirements of high-speed railway bridge

LI Xuehong, SUN Lei, XU Xiuli, WANG Rui

Author information +

文章历史 +

摘要

目前国内外的大多数减震装置只针对普通公路桥梁，不能满足高铁桥梁对高速运行的列车行车安全性和桥梁结构的安全性需求。研发了一种新型耗能减震装置，并进行了低周反复试验和冲击试验。结果表明：该新型装置的滞回曲线饱满光滑，并且随加载循环次数的增加，曲线较为稳定，具有高效稳定的耗能能力；在高速瞬时冲击力作用下，装置的位移值非常小，当冲击力达到310kN时，位移值只有2.115mm，具有非常强的抗冲击能力。装置稳定高效的耗能能力可以满足桥梁结构在地震作用下的安全性，使结构不发生破坏；而强大的抗冲击能力，可保证地震发生瞬间，桥梁结构的整体刚度不发生突变，主梁和轨道不发生较大的横向变形和振动，满足高速运行列车的行车安全性需求。此外，提出了新型装置的阻尼力公式，可为实际工程应用提供理论依据。

Abstract

At present, most of seismic isolation devices at home and abroad are only for ordinary highway bridges, they can not meet safety requirements of high-speed trains and bridge structures.Here, a new type of seismic isolation device was developed, and low cycle repeated tests and impact tests were conducted for it.The results showed that the hysteresis curve of the new device is full and smooth, with increase in loading cycles, the curve is stabler and has the effective and stable abilty of energy-dissipation; the displacement value of the device is very small under the action of high speed transient impact force; when impact force reaches 310 kN, its displacement value is only 2.115 mm, so it has a very strong anti-impact capacity; the stable and effective energy dissipation capacity of the device can meet safety requirements of bridges under earthquake, and make structures not damage; while its strong anti-impact ability can ensure the overall stiffness of a bridge structure without sudden change and the main girder and track without larger transverse deformation and vibration to meet safety requirements of trains running at high speed; the damping force formula of the new device is deduced to provide a theoretical basis for practical engineering applications.

导出引用

李雪红，孙磊，徐秀丽，王蕊. 满足高铁桥梁双重性能需求的新型减震装置研发及力学性能研究[J]. 振动与冲击, 2019, 38(15): 245-251

LI Xuehong, SUN Lei, XU Xiuli, WANG Rui. Mechanical performance of new isolation device developed to meet dual-performance requirements of high-speed railway bridge[J]. Journal of Vibration and Shock, 2019, 38(15): 245-251

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