轨道交通高架桥梁减隔震分析与应用

摘要

This paper expounds the damping mechanism of E - type steel isolation bearings. Through nonlinear time history analysis,' the isolation effectiveness and reliability of rail transit seismic isolation system has been identified. Seismic isolation bearing system can greatly alleviate the seismic forces acting on bridges, eliminating the influence of indeterminate factors on aseismic design and thereupon enhancing the aseismic safety of structures and economic benefit of design.%阐述E型钢减隔震支座的减震机理,通过非线性时程分析,证明轨道交通减隔震体系的有效性与可靠性,说明应用减隔震支座的桥梁减隔震体系可大幅减小地震力,并消除不确定因素对抗震设计的影响,从而提高结构的抗震安全性和设计的经济性.实践表明,减隔震技术在轨道交通领域的成功应用,将为我国轨道交通抗震设计开辟一个新领域,进而提高轨道交通高架桥梁的抗震防灾能力.