采用UHPC-钢管套筒连接承台的装配式混凝土桥墩抗震性能研究  

Seismic Performance of Assembled RC Pier with UHPC-steel Tube Sleeve Connected to Bearing Platform

作　　者：程章宏 CHENG Zhanghong(Fujian Transportation Planning and Design Institute Co.,Ltd.,Fuzhou,Fujian 350004,China)

机构地区：[1]福建省交通规划设计院有限公司,福建福州350004

出　　处：《水利与建筑工程学报》2025年第2期40-49,88,共11页Journal of Water Resources and Architectural Engineering

基　　金：国家重点研发计划(2017YFE0130300)。

摘　　要：为研究采用UHPC-钢管套筒连接承台的装配式混凝土桥墩(简称“USTS桥墩”)抗震性能,采用试验验证后的USTS桥墩实体有限元模型,开展USTS桥墩的受力机理分析,探讨不同构造参数对USTS桥墩抗震性能的影响,提出USTS桥墩抗震性能指标计算方法。结果表明:随着钢管套筒高度增加,USTS桥墩弹性刚度和水平承载力呈先增大再减小趋势,套筒高度与墩高比值为22.5%时,USTS桥墩抗震性能最优。钢管套筒厚度对桥墩抗震性能影响较小,建议钢管套筒埋入深度取1.0倍桥墩直径。推导的USTS桥墩弹性刚度计算公式、屈服荷载与屈服位移公式、峰值荷载与峰值位移计算公式,计算结果与有限元计算结果一致。In order to analyze the seismic performance of the assembled RC pier with UHPC-steel tube sleeve connected to bearing platform(USTS pier),a refined solid finite element model of USTS pier is established by using large-scale general finite element software ABAQUS.After verifying the validity of the finite element model,the mechanical mechanism of USTS pier is analyzed,and the experimental parameters are expanded to discuss the seismic performance of USTS pier with different structural parameters.A simplified calculation method of seismic performance index of USTS pier is proposed.The results show that with the increase of sleeve height,the elastic stiffness and horizontal bearing capacity of USTS pier first increase and then decrease,and when the ratio of sleeve height to pier height is 22.5%,the seismic performance of pier is the best.The thickness of sleeve steel tube has little influence on the seismic performance of pier.It is suggested that the embedded depth should be 1.0 times the diameter of the pier.The derived formula for the calculation of the elastic stiffness of the USTS pier,the yield load and the peak load,and the formula for calculating the peak displacement consistent with the finite element calculation results.

关 键 词：装配式桥墩 UHPC-钢管套筒 抗震性能 参数分析 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]