摘要
为了提高装配式桥墩的承载能力和耗能能力,提出一种UHPC墩周连接的新型耗能装置。利用ABAQUS有限元软件分别建立新型耗能装置的装配式桥墩和现浇整体式桥墩的有限元模型,并对2种桥墩结构进行抗震性能分析。结果发现,在低周循环往复荷载作用下,新型耗能装置的装配式桥墩比现浇整体式桥墩的最大承载能力提高41.85%,初始刚度提高86.63%,屈服刚度提高84.73%,表现出良好的抗变形能力;且新型装配式桥墩累积滞回耗能能力相比现浇整体式桥墩提高35.0%,表明新型装配式桥墩可以更好地耗散地震动能量,减小地震作用对桥梁结构的影响。
In order to improve the bearing capacity and energy dissipation capacity of fabricated pier, a new energy dissipation device connected around UHPC pier is proposed. The finite element models of fabricated pier and cast-in-situ integral pier with new energy dissipation device are established by using ABAQUS finite element software, and the seismic performance of the two pier structures is analyzed. The results show that: under low cyclic loading, the maximum bearing capacity, initial stiffness and yield stiffness of the fabricated pier with the new energy dissipation device are increased by 41.85%, 86.63% and 84.73% respectively;The cumulative hysteretic energy dissipation capacity of the new fabricated pier is 35.0% higher than that of the cast-in-situ integral pier, indicating that the new fabricated pier can better dissipate ground motion energy and reduce the impact of earthquake on the bridge structure.
作者
郭冬梅
赵奇
亓兴军
Guo Dong-mei;Zhao Qi;Qi Xing-jun(School of Transportation Engineering,Shandong Jianzhu University,Ji'nan 250101,China)
出处
《工程抗震与加固改造》
北大核心
2022年第6期98-105,共8页
Earthquake Resistant Engineering and Retrofitting
基金
山东省交通运输厅科技计划项目(2020B69)
山东省高等学校土木结构防灾减灾协同创新中心项目(XTM201904)。
关键词
装配式桥墩
UHPC
抗震性能
耗能装置
prefabricated pier
UHPC
seismic performance
energy dissipation device