震损可原位修复钢桥墩设计及其抗震性能  

Seismic behavior and design method of an innovative replaceable-on-site steel bridge pier

作　　者：吕英婷 郭子雄[1,2] 刘阳 黄群贤[1,2] Lü Yingting;GUO Zixiong;LIU Yang;HUANG Qunxian(College of Civil Engineering, Huaqiao University, Xiamen 361021, China;Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province, Xiamen 361021, China)

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]福建省结构工程与防灾重点实验室,福建厦门361021

出　　处：《中南大学学报（自然科学版）》2019年第8期1960-1970,共11页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51878304);福建省自然科学基金资助项目(2018J01074);泉州市科技计划项目(2018Z13)~~

摘　　要：为了实现桥梁结构震后性能的快速恢复,提出一种带位移型剪切钢板的新型可原位修复钢桥墩(RSS桥墩);采用ABAQUS建立RSS桥墩的有限元模型,对RSS桥墩进行低周往复荷载作用下的全过程数值模拟,研究轴压比、长细比及剪切钢板强度等参数对试件抗震性能的影响;分析研究RSS桥墩的受力机理,并提出其受弯承载力的计算公式。研究结果表明:本文设计的RSS桥墩具有良好的变形能力和稳定的滞回能力,大位移角下塑性变形集中于剪切钢板上,上部墩身及其他连接部件基本保持弹性状态,能够实现破坏部位的原位快速修复;本文提出的受弯承载力公式计算结果与数值模拟结果较吻合。To achieve rapid restoration of performance and functionality of bridge structures after earthquakes, a replaceable-on-site steel (RSS) bridge pier with replaceable steel slit dampers was developed. To investigate the influence of axial compression ratio, effective slenderness ratio and damper strength on the seismic behavior of the specimens, the finite element model (FEM) of RSS bridge pier was constructed with ABAQUS under low cyclic reversed loading. The load bearing mechanism was further analyzed, and a formula was proposed to calculate the flexural bearing capacity of RSS bridge pier. The results show that the designed RSS bridge pier has superior deformation capacity and stable load-carrying capacity. The plastic damage concentrates only on the steel slit dampers at the large displacement angles, while the main structure and connecting parts remain nearly elastic. Therefore, repairable-on-site after earthquake can be achieved. The calculation result obtained from the proposed formula is in good agreement with the numerical simulation result.

关 键 词：桥梁工程 钢桥墩 有限元分析 震损可原位修复 抗震性能 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]