自复位预制节段桥墩抗震性能试验研究  

Experimental study on seismic performance of the self-resetting precast segmental bridge piers

作　　者：高明 崔恩文 温永昕 王俊杰 钱冬 GAO Ming;CUI Enwen;WEN Yongxin;WANG Junjie;QIAN Dong(Lianyungang Technical College,Lianyungang 222000,China;Jiangsu Ocean University,Lianyungang 222005,China;Lianyungang Architectural Design and Research Institutelimited Liability Company,Lianyungang 222001,China)

机构地区：[1]连云港职业技术学院,江苏连云港222000 [2]江苏海洋大学,江苏连云港222005 [3]连云港市建筑设计研究院有限责任公司,江苏连云港222001

出　　处：《世界地震工程》2024年第3期200-207,共8页World Earthquake Engineering

基　　金：国家自然科学基金项目(51878315)。

摘　　要：为提高装配式预制桥墩的抗震性能以及解决震后可修复的问题,本文基于后张无黏结预应力筋的连接技术,提出了一种新型自复位预制节段桥墩(self-centering precast segmental bridge pier,SPSBP)。该新型自复位预制节段桥墩由预制构件(盖梁、节段、基础)、可更换耗能角钢和连接钢板组成。本文设计并完成了三组SPSBP试件的拟静力试验,研究初始预应力、耗能角钢厚度以及长度三个参数对SPSBP试件抗震性能的影响。试验结果表明:该新型结构形式具有较好的自复位以及耗能能力;当加载到最大位移比时,试件变形主要集中于耗能角钢,主体预制结构并未发生明显破坏,表明了结构的完整性;提高初始预应力能有效提高结构的承载力等抗震性能并减小残余变形;增加耗能角钢厚度,可以提高SPSBP耗能能力以及承载力;耗能角钢长度对SPSBP性能影响不明显。Based on the post-tensioning technology of unbonded tendons,this paper proposed a novel type of self-centering precast segmental bridge pier(SPSBP)to enhance the seismic performance and address post-earthquake reparability issues of prefabricated bridge piers.The SPSBP consists of prefabricated components(cap beams,segments,base),replaceable energy-dissipating angle steels,and connecting steel plates.Three sets of comparative experiments were conducted to investigate the SPSBP through quasi-static tests,considering three parameters:initial prestressing force,thickness,and length of energy-dissipating angle steels.The experimental results demonstrate that this new structural form exhibits excellent self-centering and energy-dissipating capabilities.When reaching the maximum displacement ratio,the deformation of the specimens mainly concentrates on the energy-dissipating angle steels,with no significant damage observed in the main prefabricated structure,indicating its integrity.Increasing the initial prestressing force effectively enhances the structural bearing capacity and seismic performance while reducing residual deformation.Increasing the thickness of energy-dissipating angle steels can enhance the energy dissipation capability and bearing capacity of SPSBP.The length of energy-dissipating angle steels has an insignificant impact on the performance of SPSBP.

关 键 词：无黏结后张预应力 预制节段桥墩 角钢 拟静力试验 耗能 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]