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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (3): 128-140.doi: 10.6040/j.issn.1672-3961.0.2024.168

• 土木工程 • 上一篇    

UHPC加固钢筋混凝土方形桥墩抗震性能参数分析

郑衍磊1,徐龙伟2,张汉玉1,王桂梅2,付涛2*   

  1. 1.山东省路桥集团有限公司, 山东 济南 250014;2.山东建筑大学交通工程学院, 山东 济南 250101
  • 发布日期:2025-06-05
  • 作者简介:郑衍磊(1982— ),男,山东东平人,高级工程师,主要研究方向为桥梁道路施工等. E-mail:487897205@qq.com. *通信作者简介:付涛(1981— ),男,山东潍坊人,教授,硕士生导师,博士,主要研究方向为桥梁结构抗震与耐久性. E-mail:greenvillage_17@163.com
  • 基金资助:
    山东省自然科学基金资助项目(ZR2021ME227);山东省交通运输科技计划资助项目(2024B90)

The seismic performance parameter analysis of reinforced concrete square bridge piers strengthened with UHPC

ZHENG Yanlei1, XU Longwei2, ZHANG Hanyu1, WANG Guimei2, FU Tao2*   

  1. ZHENG Yanlei1, XU Longwei2, ZHANG Hanyu1, WANG Guimei2, FU Tao2*(1. Shandong Luqiao Group Co., Ltd., Jinan 250014, Shandong, China;
    2. School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China
  • Published:2025-06-05

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摘要： 为研究超高性能混凝土(ultra-high performance concrete, UHPC)加固钢筋混凝土桥墩加固区构造参数对桥墩抗震性能的影响,基于桥墩拟静力试验结果,采用ABAQUS有限元软件建立桥墩有限元模型,基于试验数据验证桥墩有限元模型的准确性,采用控制变量法对加固层高度、加固层厚度和墩身配筋等构造参数进行分析。研究结果表明:随着加固层UHPC高度的增大,墩身塑性损伤减少,对墩身抵抗初始变形能力和抗弯承载力的提高产生了积极影响。桥墩在一定加固层厚度下对墩身的约束作用会达到饱和状态,继续增加加固层UHPC厚度对墩身损伤及各项指标不会产生明显影响。纵筋强度的增加对UHPC加固后桥墩抗震性能影响较大,较大程度地增加了桥墩的水平抗弯承载力,同时使得墩身的位移延性系数降低,不同强度纵筋桥墩骨架曲线整体发展趋势相近,等强度和等体积代换为高强度纵筋后,墩身整体刚度的退化速率延缓,桥墩弹性工作能力增强。

关键词: UHPC, 高强钢筋, 抗震加固, 拟静力试验, 参数分析

Abstract: In order to investigate the influence of the structural parameters of the reinforced concrete piers reinforced with ultra-high performance concrete(UHPC)on the seismic performance of the piers, based on the results of the proposed static test of the piers, the finite element model of the piers was established by using the ABAQUS. Based on the test data, the accuracy of the finite element model of the pier was verified, and the structural parameters such as the height of the reinforcement layer, the thickness of the reinforcement layer, and the reinforcement of the pier were analyzed using the control variable method. The results of the research showed that with the increase of the height of the reinforced layer UHPC, the plastic damage of the pier body decreased, which positively affected the improvement of the pier body's ability to resist the initial deformation and flexural load capacity. Under a certain thickness of reinforcement layer, the constraining effect of the abutment reached a saturation state, where further increasing the thickness of the UHPC reinforcement layer did not significantly affect the damage to the abutment or any related indicators. The increase in longitudinal reinforcement strength significantly impacted the seismic performance of bridge piers reinforced with UHPC, notably enhancing the pier's horizontal flexural capacity to a greater extent, while concurrently reducing the displacement ductility coefficient of the pier body. The overall development trends of bridge pier skeleton curves were similar for different strengths of longitudinal reinforcement. Substituting equal strength or equal volume with high-strength longitudinal reinforcement delayed the overall stiffness degradation of the pier body, thereby enhancing the elastic working capacity of the bridge pier.

Key words: UHPC, high-strength reinforcement, seismic strengthening, quasi-static test, parametric analysis

中图分类号: 

  • TU997
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