NDLI: Cyclic Pull-Out Push-In Shear-Lag Model for Post-installed Anchor-Infill Assembly

Content Provider	Springer Nature Link
Author	Saleem, Muhammad
Copyright Year	2014
Abstract	A cyclic piecewise linear shear-lag material model representing the local bond behavior of the post-installed anchor-infill assembly used for simulating its cyclic pull-out push-in response is presented. The anchor-infill assembly is such that used in various strengthening techniques to strengthen reinforced concrete structures. The properties of the infill material used for installing post-installed anchor-infill assembly are characterized by a nonlinear interface between the surrounding concrete and the anchor. A new type of anchor-infill assembly is introduced in which the infill material is divided into two layers for the purpose of providing a larger failure path length resulting in increase of the energy absorption capacity. The cyclic response is divided into two categories, namely the one with indentation and the one without indentation, where indentation represents concrete crushing at the base of drilled hole used for installing anchor bar. Each cycle is further subdivided into six paths of elastic loading followed by de-bonding in pull-out direction, unloading, reloading, de-bonding in push-in direction and unloading again. The stiffness degradation upon de-bonding and stiffness recovery upon reloading due to the lateral pressure effect and Poisson’s effect is incorporated in the form of stiffness and constant shear force update at the beginning of each loading path. Rules are formulated to plot the cyclic response, by a trial and error approach, to suit the presented material model. The sequential conceptual diagram showing the development of global cyclic load–displacement response of the anchor-infill assembly is also presented. Finally, the response of the anchor-infill assembly is plotted using thefinite element method under three different support conditions and comparisons are made with the results of numerical rules and good agreement is found. The effectiveness of the proposed two-layer model is also confirmed by comparing its cyclic pull-out push-in response with that of single-interface model, and it is found that the energy absorption capacity increases by 24 % and the failure path length increases by 80 %.
Starting Page	8537
Ending Page	8547
Page Count	11
File Format	PDF
ISSN	13198025
Journal	Arabian Journal for Science and Engineering
Volume Number	39
Issue Number	12
e-ISSN	21914281
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Post-installed anchor-infill assembly Local bond behavior Cyclic shear-lag model Pull-out Push-in Lateral pressure Indentation Engineering Science
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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