底部填芯预制节段拼装桥墩抗震性能数值仿真分析  

Numerical Simulation Analysis of Seismic Performance of Prefabricated Segmental Assembled Piers with Core Filling at the Bottom

作　　者：郦炎森 贾俊峰[1] 杨凯 张凯迪 杨大海[2] 赵建瑜 邓贺丹 Li Yansen;Jia Junfeng;Yang Kai;Zhang Kaidi;Yang Dahai;Zhao Jianyu;Deng Hedan(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei 230088,China;The ChinaENFI Engineering Co.,Ltd.,Beijing 100080,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]安徽省交通规划设计研究总院股份有限公司,安徽合肥230088 [3]中国恩菲工程技术有限公司,北京100080

出　　处：《市政技术》2024年第4期172-183,244,共13页Journal of Municipal Technology

基　　金：北京市自然科学基金(8234060)。

摘　　要：为促进预制节段拼装桥墩在山区复杂环境及强震地区的应用,提出了一种底部填芯的预制节段拼装桥墩,采用ABAQUS有限元模型讨论了填芯段高度、初始张拉力和耗能钢筋配筋率等关键参数对底部填芯预制节段拼装桥墩抗震性能的影响规律。研究结果表明:随着填芯段高度的增大,底部填芯预制节段拼装桥墩的承载能力和耗能能力显著提高,但残余位移和填芯段上部接缝开口宽度也增大;随着初始张拉力的增大,底部填芯预制节段拼装桥墩承载能力和耗能能力略有提高,残余位移和墩底混凝土损伤程度基本不变;随着耗能钢筋配筋率的增大,底部填芯预制节段拼装桥墩承载能力和耗能能力提高,但填芯段上部接缝开口宽度增大。研究结果可为底部填芯预制节段拼装桥墩合理构造提供参考,促进预制拼装桥墩在山区复杂环境和强震地区的应用。In order to promote the application of prefabricated segmental assembled piers in the complex environment of mountainous areas and strong seismic areas,a kind of prefabricated segmental assembled pier with core flling at the bottom is proposed.ABAQUS finite element model is used to discuss the influence of key parameters such as the height of core filling sections,the initial tensioning force and the reinforcement ratio of energy dissipation bar on the seismic performance of the prefabricated segmental assembled piers with core filling at the bottom.The results show that the bearing capacity and energy consumption capacity of the prefabricated segmental assembled piers with core filling at the bottom increases significantly with the increase of the height of core filling sections.But the residual displacement and the width of the joint opening in the upper part of the core filling sections also increase;With the increase of the initial tensioning force,the bearing capacity and energy consumption capacity of the prefabricated segmental assembled piers with core filling at the bottom increase slightly,and the residual displacement and the damage of the concrete at the bottom of the pier are basically unchanged;With the increase of the reinforcement rate of energy dissipation bar,the bearing capacity and energy consumption capacity of the prefabricated segmental assembled piers with core filling at the bottom increases.But the width of the upper joint opening of the core-filled segment increases.The results can provide reference for the reasonable construction of precast segmental piers with core filling at the bottom,and promote the application of precast segmental piers in mountainous areas with complex environments and strong seismic zones.

关 键 词：预制节段拼装桥墩 底部填芯 抗震性能 填芯段高度 初始张拉力 耗能钢筋配筋率 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]