循环荷载下灌浆套筒连接装配式立交桥墩柱承载特性研究  

Bearing Characteristics of Prefabricated Pier Columns Connected by Grouting Sleeves in Overpasses under Cyclic Loading Condition

作　　者：魏广峰 马一跃 徐柯锋 朱长根 吴泰星 任中俊[3] 吕玺琳[4] WEI Guangfeng;MA Yiyue;XU Kefeng;ZHU Changgen;WU Taixing;REN Zhongjun;LYU Xilin(Shanghai Baoye Group Co.,Ltd.Shanghai 200941,China;Zhejiang Jiaogong Group Co.,Ltd,Hangzhou 310052,China;Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring,Hunan University of Science and Technology,Xiangtan 411201,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)

机构地区：[1]上海宝冶集团有限公司,上海200941 [2]浙江交工集团有限公司,杭州310052 [3]湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室,湘潭411201 [4]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《结构工程师》2025年第1期109-117,共9页Structural Engineers

基　　金：国家重点研发计划项目(2021YFB2600700)。

摘　　要：基于缩尺物理模型试验和三维有限元数值模拟,研究了灌浆套筒连接立交桥桥墩的横向承载力和破坏特征,并探讨了其耗能特性。灌浆套筒连接桥墩循环加载试验结果表明,墩柱失效前未出现节点破坏,其失效模式为柱身弯曲破坏。建立了灌浆套筒连接式桥墩精细化有限元分析模型,并引入混凝土弹塑性损伤本构模型,模拟了桥墩在往复循环荷载作用下的力学响应和损伤过程。进一步分析了轴压比和预应力水平对桥墩承载性能的影响规律,结果表明,高轴压比有利于提高灌浆套筒连接式桥墩的横向承载力,但会降低其耗能及延性性能。预应力可提高桥墩的横向承载力,略增大其耗能能力,但会降低延性变形能力。Based on scaled physical model tests and three-dimensional finite element numerical simulation,the lateral bearing capacity and failure characteristics of grouted sleeve connected bridge piers for overpasses were studied,and their energy dissipation characteristics were explored.The cyclic loading test results of the grouting sleeve connected pier column indicate that there was no node failure before the pier column failure,and its mode was column bending failure.A refined finite element analysis model for grouted sleeve connected bridge piers was established,and an elastoplastic damage constitutive model for concrete was introduced to simulate the mechanical response and damage process of the bridge piers under reciprocating cyclic loads.Further analysis was conducted on the influence of axial compression ratio and prestressing level on the bearing capacity of bridge piers.The results showed that a high axial compression ratio is beneficial for improving the lateral bearing capacity of grouted sleeve connected bridge piers,but it will reduce their energy consumption and ductile deformation performance.Pre stressing can increase the lateral bearing capacity of bridge piers,slightly increasing their energy dissipation capacity,but reducing their ductile deformation capacity.

关 键 词：灌浆套筒 拼装式桥墩 循环荷载 承载特性 数值模拟 

分 类 号：TU375.3[建筑科学—结构工程]