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论文类型：期刊论文

发表时间：2018-03-01

发表刊物：JOURNAL OF BRIDGE ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：23

期号：3

ISSN号：1084-0702

关键字：Base isolation; Benchmark problem; Negative stiffness device; Seismic response control

摘要：The effectiveness of a novel negative stiffness device (NSD) and damper system for reduction of the seismic response of highway bridges was investigated in this study. To this end, a Phase II benchmark highway bridge was employed for the numerical evaluation. By engaging the NSD at an appropriate apparent yield displacement, the combination of isolation system and NSD device behaves like a softening system, resulting in an increase in the combined system displacement response. The increased deformation of the combined system is reduced by additional passive damping in parallel with the NSD. An analytical model for the NSD was developed. Experimental results are presented to verify the analytical model of the NSD. The effectiveness of the proposed NSD in response control was evaluated by numerical simulation of the benchmark highway bridge, and the results demonstrate that the proposed passive NSD and damper system is beneficial in controlling the seismic response of base-isolated bridges and provides performance comparable to the sample semiactive control but by passive means. (C) 2018 American Society of Civil Engineers.