燕  斌，冯云成
    （中交第一公路勘察设计研究院有限公司，西安710075）

[摘要] 厦漳跨海大桥位于强震多发区，地震作用控制设计。南汊北引桥采用连续梁方案，从减隔震原理出发，研究了几种减隔震抗震设计方案（阻尼器方案、LRB方案、PSD方案、Lock-up方案）对结构抗震性能的影响。分析可知：不同的减隔震抗震设计方案对结构动力特性的影响也不相同，采用减隔震方案后，结构主要地震响应量均有不同程度地减小，其中以LRB方案为最优，以此作为北引桥的最终抗震设计方案。
[关键词] 减隔震；抗震性能；阻尼器方案；LRB方案；PSD方案；Lock-up方案

Seismic-isolated scheme design for northern approach span of southern branch of Xia-Zhang sea-crossing bridge
Yan Bin, Feng Yuncheng
(CCCC First Highway Consultants Co., Ltd., Xi'an 710075, China)

Abstract: Xia-Zhang sea-crossing bridge was on the belts of seismic activity, the design of which was governed by seismic action. Continuous beam scheme was adopted for northern approach span of southern branch. On the basis of seismic-isolated principles, different seismic-isolated scheme design, including damper scheme, LRB scheme, PSD scheme, Lock-up scheme, were studied to examine the influence to seisnuc performance to structure. It shows that dynamic characteristic of structure was influenced by different designs of seismic-isolated scheme. Main seismic response of structure was reduced to some extent when applying different designs of seismic-isolated scheme. LRB scheme was the optimal one among all theses seismic-isolated schemes, which was established as the final seismic design scheme of northern approach span of southern branch.
Keywords: seisnuc-isolated; seismic performance; damper scheme; LRB scheme; PSD scheme; Lock-up scheme