桥梁新型减隔震支座的研究进展

Advances of New-Style Isolation Bearings in Bridges

介绍了桥梁减隔震体系的工作原理,回顾了减隔震支座中常用的滑动摩擦体系、橡胶类体系、钢耗能体系的基本特点、设计参数及工程应用实例。在此基础上重点介绍了变曲率摩擦摆锤支座(VCFPS)、双凹面摩擦摆锤支座(DCFP)、滚轴支座(RBS)等新型减震支座。这些支座设计参数灵活、对地震强度和频谱特性适应性强,应用前景广阔。随后提出在桥梁新型减隔震支座设计中应重视支座对动荷载的适应能力,在立足发展减隔震设计理论的同时应尽快制定适合我国国情和材料性能特点的减隔震支座设计规范。

The basic principles, function and applications of seismic isolation bearings for bridges at home and abroad such as sliding friction system, rubber type system and metallic energy dissipation system were briefly reviewed. Thereafter the newly developed seismic isolation bearings such as VCFPS, DCFP, and RBS were comprehensively introduced. These bearings are characterized by flexible design parameters, good adaptability to different earthquake intensity and frequencies, as well as applicability in wide range. Finally, adaptability to moving load should be emphasized when designing new - style isolation bearings. While developing the isolation system designing theory, a designing code for isolation bearing adapting to the circumstance of China and material performance should be established as early as possible.