附加可更换阻尼器装配式桥墩的抗震性能
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河北工程大学土木工程学院

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Seismic performance of prefabricated pier with replaceable damper
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College of Civil Engineering, Hebei University of Engineering

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    摘要:为减轻灌浆套筒装配式桥墩的地震损伤,以达到震后尽快恢复桥墩使用功能的目的,在常规灌浆套筒装配式桥墩的基础上,提出一种在桥墩墩底连接处设置可更换阻尼器的改进方案。采用数值模拟方法对常规灌浆套筒装配式桥墩和附加阻尼器灌浆套筒装配式桥墩进行对比分析,研究附加可更换阻尼器装配式桥墩的抗震性能。研究结果表明:附加可更换阻尼器桥墩的抗震性能有所提高,灌浆套筒装配式桥墩墩底连接处的损伤也有所减轻,而且桥墩大部分的损伤集中在阻尼器上,易于震后修复更换。灌浆套筒装配式桥墩安装可更换阻尼器后,其水平承载力提高了10%,累积耗能提高了27%,桥墩墩底连接处的损伤有所减轻,其中最大残余位移减少了19%,桥墩抗震性能有所提高,对桥梁韧性抗震研究具有一定借鉴意义。

    Abstract:

    Abstract:In order to reduce the plastic seismic damage of prefabricated pier with grouting sleeve and resume the function of the pier in a timely manner, the concept of the prefabricated pier with damper grouting sleeve was proposed. A conventional prefabricated pier with grouting sleeve and pier with grouting sleeve and replaceable damper were finite element analysis using numerical modeling method. Two models were established to compare the seismic performance between conventional pier and bridge pier with replaceable damper, respectively. It is identified that the horizontal bearing capacity and energy dissipation capacity of the replaceable dampers are improved. The replaceable viscoelastic damper can effectively control the structural dynamic responses, reduce the prefabricated pier damage.The result shows that the horizontal bearing capacity and cumulative energy dissipation of the prefabricated pier with replaceable damper are 10% and 27% higher than conventional bridge pier. The maximum residual displacement of the prefabricated pier with damper decrease by 19%. The damper can effectively control the structural dynamic responses, reduce the prefabricated pier damage.

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  • 收稿日期:2020-01-12
  • 最后修改日期:2020-09-15
  • 录用日期:2020-10-23
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