大跨度三塔悬索桥弹塑性软钢阻尼器减震控制

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (23) : 226-233.

论文

张玉平，王浩，邹仲钦，陶天友,郑文智

作者信息 +

Aseismic control of a long-span triple-tower suspension bridge with elastic-plastic steel dampers

ZHANG Yuping， WANG Hao， ZOU Zhongqin， TAO Tianyou， ZHENG Wenzhi

Author information +

文章历史 +

摘要

大跨度三塔悬索桥是一种具有超大跨越能力的新型多塔悬索桥结构，其抗震特性备受关注。软钢阻尼器已被广泛应用于建筑结构的抗震加固中，但在桥梁工程中应用并不多见，为此，本文以泰州大桥为例，开展了软钢阻尼器应用于大跨度三塔悬索桥的减震控制研究。首先对软钢阻尼器参数进行敏感性分析，获得最优控制参数，据此分别研究一致激励和行波激励下软钢阻尼器的减震效果，并重点分析视波速对减震效果的影响。结果表明：设置软钢阻尼器可有效减小塔梁相对位移，但会使中塔底剪力和部分视波速下边塔底内力有所增大；在一定范围内的低视波速下近震源端结构内力减震效果优于远震源端，但在高视波速下远震源端减震效果明显大于近震源端。

Abstract

A long-span triple-tower suspension bridge is a brand-new type of multi-tower suspension bridge structure with super span ability,and its aseismic behavior attracts extensive attention.Elastic-plastic steel damper (EPSD) is widely used in seismic reinforcement of building structures,but its application in bridge engineering is rare.Here,taking Taizhou Bridge in China as an example,EPSD applied in aseismic control of a long-span triple-tower suspension bridge was studied.Firstly,the sensitivity analysis was performed for EPSD’s parameters to acquire the optimal control parameters.Then,vibration control effects were studied based on two different seismic input modes including uniform excitation and traveling wave excitation,and influences of seismic apparent wave velocities on the aseismic effect were emphatically analyzed.The results showed that relative displacements between towers and the main girder can be effectively reduced with the application of EPSD,but shear force at the bottom of mid-tower and internal forces at the bottom of edge towers under several apparent velocities increase; the internal force aseismic effects on the structure end close to the earthquake source are better than those far from the earthquake source under a certain range of low apparent wave velocities,while the aseismic control effects on the structure end far from the earthquake source are significantly better than those close to the earthquake source under high apparent velocities.

导出引用

张玉平，王浩，邹仲钦，陶天友,郑文智. 大跨度三塔悬索桥弹塑性软钢阻尼器减震控制[J]. 振动与冲击, 2018, 37(23): 226-233

ZHANG Yuping， WANG Hao， ZOU Zhongqin， TAO Tianyou， ZHENG Wenzhi. Aseismic control of a long-span triple-tower suspension bridge with elastic-plastic steel dampers[J]. Journal of Vibration and Shock, 2018, 37(23): 226-233

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