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燕 斌，馮云成
（中交第一公路勘察設(shè)計研究院有限公司，西安710075）[摘要] 廈漳跨海大橋位于強震多發(fā)區(qū)，地震作用控制設(shè)計。南汊北引橋采用連續(xù)梁方案，從減隔震原理出發(fā)，研究了幾種減隔震抗震設(shè)計方案（阻尼器方案、LRB方案、PSD方案、Lock-up方案）對結(jié)構(gòu)抗震性能的影響。分析可知：不同的減隔震抗震設(shè)計方案對結(jié)構(gòu)動力特性的影響也不相同，采用減隔震方案后，結(jié)構(gòu)主要地震響應(yīng)量均有不同程度地減小，其中以LRB方案為最優(yōu)，以此作為北引橋的最終抗震設(shè)計方案。
[關(guān)鍵詞] 減隔震；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
