{"title":"Behaviour of repaired RC beam-column joints using welded wire mesh and jacketed with polymer modified mortar","authors":"C. Marthong, J. Vanlalruata","doi":"10.12989/EAS.2021.21.1.079","DOIUrl":null,"url":null,"abstract":"The performances of repaired RC exterior beam-column joints were reported in this paper. The aim of the study was to restore back the lost capacity of the beam-column joint to the original state or more. Five type of exterior beam-column joint with different position of cold joint in the column were casted and subjected to reversed cyclic loading. The damage zones were confined with welded wire mesh (WWM) of 20 mm grid size and jacketed with polymer modified mortar (PMM). Damaged specimens after repairing were also subjected to similar cyclic displacement as those of control specimens. Seismic parameters such as load carrying capacity, energy dissipation, ductility, stiffness degradation, equivalent viscous damping, damage indices and nominal principal tensile stresses were analyzed. Results show that repaired specimens exhibited better seismic performance and hence the adopted repairing strategies could be considered as appropriate. These findings would be helpful to the field engineers to adopt a suitable rapid and cost-efficient repairing technique for restoring the damaged frame structural joints for post-earthquake usage. Further, the study revealed that there is an improvement in seismic capacity of the specimens as the location of cold joint is placed away from the soffit of the beam for lower story column.","PeriodicalId":49080,"journal":{"name":"Earthquakes and Structures","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Earthquakes and Structures","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.12989/EAS.2021.21.1.079","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 1
Abstract
The performances of repaired RC exterior beam-column joints were reported in this paper. The aim of the study was to restore back the lost capacity of the beam-column joint to the original state or more. Five type of exterior beam-column joint with different position of cold joint in the column were casted and subjected to reversed cyclic loading. The damage zones were confined with welded wire mesh (WWM) of 20 mm grid size and jacketed with polymer modified mortar (PMM). Damaged specimens after repairing were also subjected to similar cyclic displacement as those of control specimens. Seismic parameters such as load carrying capacity, energy dissipation, ductility, stiffness degradation, equivalent viscous damping, damage indices and nominal principal tensile stresses were analyzed. Results show that repaired specimens exhibited better seismic performance and hence the adopted repairing strategies could be considered as appropriate. These findings would be helpful to the field engineers to adopt a suitable rapid and cost-efficient repairing technique for restoring the damaged frame structural joints for post-earthquake usage. Further, the study revealed that there is an improvement in seismic capacity of the specimens as the location of cold joint is placed away from the soffit of the beam for lower story column.
期刊介绍：
The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response
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