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Modelling structural response of flexible plug expansion joints under thermal movements
Georgia Inst Technol, Sch Civil Engn, Atlanta, GA 30332 USA..
KTH, School of Architecture and the Built Environment (ABE).ORCID iD: 0000-0002-2318-2797
Swiss Fed Labs Mat Sci & Technol, EMPA, Ueberlandstr 129, CH-8600 Dubendorf, Switzerland..
Swiss Fed Labs Mat Sci & Technol, EMPA, Director Rd Engn Components Sealing Components, Div Bldg Mat,KTH Stockholm, Ueberlandstr 129, CH-8600 Dubendorf, Switzerland..
2020 (English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 21, no 4, p. 1027-1044Article in journal (Refereed) Published
Abstract [en]

This paper focuses on experiments and finite element modelling of flexible plug expansion joints (Asphaltic Plug Joints, APJ) subject to thermally induced horizontal movements. Five geometric and structural key parameters that influence (APJs) responses under thermal movements are studied: (1) joint length; (2) joint thickness; (3) joint width; (4) anti-bonding mat; (5) movement-aid spring. The viscoelastic computational finite element models are based on properties determined with a special cyclic coaxial shear test (CAST) and validated by an integrated approach incorporating cold temperature repeated movement capacity tests with a special Joint Movement Simulator (JMS) and a 3-Dimensional Digital Image Correlation system (3D DIC). It was found that the increase of joint width significantly reduces the stress at the interface between the mastic asphalt and APJ. The results also showed, that thin joints generate lower stress levels in APJ under thermal condition. Moreover, peak stresses in APJ appeared controlled mainly by the total size of the debonded region and the horizontal movement applied. The main findings are considered valuable for superior structural design, geometry selection and construction guidelines for APJ.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2020. Vol. 21, no 4, p. 1027-1044
Keywords [en]
expansion joint, bridge, pavement, finite element, thermal movement, debonding, cracking
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-273097DOI: 10.1080/14680629.2018.1534695ISI: 000527272500008Scopus ID: 2-s2.0-85055457909OAI: oai:DiVA.org:kth-273097DiVA, id: diva2:1429831
Note

QC 20200512

Available from: 2020-05-12 Created: 2020-05-12 Last updated: 2020-05-12Bibliographically approved

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Hailesilassie, Biruk

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