【作者】 阎石； 张海；

【Author】 YAN Shi, ZHANG Hai(Dept. of Civ. Eng., Shenyang Arch. and Civ. Eng, Univ., Shenyang, 110015, China)

【机构】 沈阳建筑工程学院土木工程学院；

【摘要】 本文建立了高架桥结构考虑刚度退化多自由度体系,在纵向水平地震作用下的非线性动力反应计算模型及运动方程,探讨了结构振动LQR半主动控制算法,并利用Matlab语言编制的程序对其进行了数值计算分析;结果表明,将隔震技术与利用MR阻尼器的半主动控制技术相结合,能够有效地减小高架桥的地震反应;MR阻尼器的设置位置以及结构参数的选取对控制效果有较大影响。考虑桥墩非线性影响将能得到更为接近实际的计算结果。更多还原

【Abstract】 The calculating model and equation of motion of the elevated highway bridge under the longitudinal ground motion are set up and the non-linear calculation model of the piers that rigid degradation is considered is also used, and the LQR semi-active control algorithms of structure vibration is discussed in the paper; The numerical simulative calculation is carried out using Matlab program. The results of the calculation show that it is effective to reduce seismic response of the elevated highway bridge by combining vibration isolation with semi-active control technique under the earthquake. The location of MR dampers and parameters of the structure will influence seriously to the effects of structural control. The conclusion of simulation will be more similar to reality in engineering application if non-linear properties of the piers are considered.更多还原