A new strategy for restraining seismic response of highway bridges

Ma Yong-quan, Qiu Hong-xing
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Abstract

In order to solve the difficult problem that traditional fuzzy logic control (FLC) strategy shows dissatisfactory control effect when facing different control objectives and load actions, this paper proposes a variable universe-based self-adaptive fuzzy control strategy (VAFC) theory. This strategy improves the performance of the FLC strategy by adjusting the universe of FLC input and output variables online, and designs the self-adaptive law of output universe based on Lyapunov function. This paper introduces modified clipped-optimal (MCO) into VAFC active control strategy and puts forward VAFC/MCO semi-active control strategy. In this paper, seismic responses of three-span continuous girder bridge under the control of VAFC/MCO, FLC/MCO and LQG/MCO are analyzed respectively, and the results show that the VAFC/MCO strategy has more significant seismic reduction effects than the FLC/MCO and LQG/MCO strategies do.
抑制公路桥梁地震反应的新策略
为了解决传统模糊逻辑控制策略在面对不同控制目标和负载作用时控制效果不理想的难题,提出了一种基于变宇宙的自适应模糊控制策略理论。该策略通过在线调整FLC输入和输出变量的范围来提高FLC策略的性能,并设计了基于Lyapunov函数的自适应输出范围律。本文将改进的剪切最优(MCO)引入VAFC主动控制策略,提出了VAFC/MCO半主动控制策略。本文对三跨连续梁桥在VAFC/MCO、FLC/MCO和LQG/MCO控制下的地震反应进行了分析,结果表明VAFC/MCO策略比FLC/MCO和LQG/MCO策略具有更显著的减震效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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