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上锚式灌浆波纹管连接墩柱受力性能研究
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(1.南京市公路事业发展中心,江苏 南京 210014;2.华设设计集团股份有限公司,江苏 南京 210014;3.南京市六合区公路事业发展中心,江苏 南京 211500)

作者简介:

Jie Zhang, M.E., Senior Engineer. Working at Nanjing Highway Development Center. Research Direction: Highway Construction and Maintenance Management.

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Performance of Column with Upper-Anchored Grouted Corrugated Duct Connections Under Load
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Affiliation:

(1.Nanjing Highway Development Center, Nanjing 210014, Jiangsu Province, China; 2.China Design Group Co., Ltd., Nanjing 210014, Jiangsu Province, China; 3.Liuhe District Highway Development Center of Nanjing City, Nanjing 211500, Jiangsu Province, China)

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    摘要:

    城市预应力混凝土桥梁的装配式建造核心在于提高结构性能和施工效率。为改善预制墩柱与承台连接的施工便捷性及受力性能,本文提出了一种新型的上锚式灌浆金属波纹管连接构造。通过对整体浇筑墩柱、灌浆套筒连接墩柱和上锚式灌浆波纹管连接墩柱的pushover损伤过程进行比较,分析了墩柱高度和轴压比对灌浆波纹管连接墩柱性能的影响。研究结果表明,上锚式灌浆波纹管连接墩柱具有较好的静力性能和延性性能,其水平承载力比整体浇筑墩柱高23%,延性性能为整体浇筑墩柱的98%。此外,上锚式灌浆波纹管连接墩柱的混凝土损伤主要区域远离墩底拼接面,损伤区域分布范围更广,塑性铰高度更高。在设计灌浆波纹管连接墩柱时,建议控制截面位置(截面扩大处和墩底截面)的弹性曲率比不小于1.8。

    Abstract:

    The core goal of the prefabricated construction of urban prestressed concrete bridges is to improve structural performance and construction efficiency. To improve the construction convenience and load-bearing performance of the connection between precast columns and pile caps, a novel connection structure for upper-anchored grouted corrugated ducts is proposed in this study. By comparing the pushover damage process of the integral casting column, the column connected by the grouting sleeve and the column connected by the upper-anchored grouted corrugated duct, the effects of the column height and the axial compression ratio on the performance of the column connected by the grouted corrugated duct were analyzed. Research results indicate that columns with upper-anchored grouted corrugated ducts exhibit superior static performance and ductility, with horizontal load-carrying capacities 23% greater than those of integrally cast columns and ductility performances 98% greater than those of integrally cast columns. Additionally, the primary concrete damage areas of these structures are farther from the bottom joint interface, featuring a wider distribution range of damaged areas and higher plastic hinge heights. When designing connections for columns with upper-anchored grouted corrugated ducts, controlling the elastic curvature ratio at section locations (sections with enlarged dimensions and sections at the base of columns) to be no less than 1.8 is recommended.

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Jie Zhang, Chenxi Fu, Yuanhong Fu, Siyuan Li Performance of Column with Upper-Anchored Grouted Corrugated Duct Connections Under Load. Prestress Technology 2025,3(01):1-13. 10.59238/j. pt.2025.01.001

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历史
  • 收稿日期:2024-12-19
  • 最后修改日期:2025-01-10
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  • 在线发布日期: 2025-03-29
  • 出版日期: 2025-03-30