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Article: Field pullout testing and performance evaluation of GFRP soil nails

TitleField pullout testing and performance evaluation of GFRP soil nails
Authors
KeywordsFiber reinforced polymer
Fiberglass
Pullout
Soil nailing
Tests
Issue Date2011
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/gt.html
Citation
Journal Of Geotechnical And Geoenvironmental Engineering, 2011, v. 137 n. 7, p. 633-642 How to Cite?
AbstractGlass fiber-reinforced polymer (GFRP) materials provide practical solutions to corrosion and site-maneuvering problems for civil infrastructures using conventional steel bars as reinforcements. In this study, the feasibility of using GFRP soil nails for slope stabilization is evaluated. The GFRP soil nail system consists of a GFRP pipe installed by the double-grouting technique. Two field-scale pullout tests were performed at a slope site. Fiber Bragg grating (FBG) sensors, strain gauges, linear variable displacement transformers (LVDTs), and a load cell were used to measure axial strain distributions and pullout force-displacement relationships during testing. The pullout test results of steel soil nails at another slope site are also presented for comparison. It is proven that the load transfer mechanisms of GFRP and steel soil nails have certain difference. Based on these test results, a simplified model using a hyperbolic shear stress-strain relationship was developed to describe the pullout performance of the GFRP soil nail. A parametric study was conducted using this model to study some factors affecting the pullout behavior of GFRP soil nails, including nail diameter, shear resistance of soil-grout interface, and ratio of interface shear coefficient to the Young's modulus of the nail. The results indicate that the GFRP soil nail may exhibit excessive pullout displacement and thus a lower allowable pullout resistance than with the steel soil nail. © 2011 American Society of Civil Engineers.
Persistent Identifierhttp://hdl.handle.net/10722/135053
ISSN
2015 Impact Factor: 1.696
2015 SCImago Journal Rankings: 2.344
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Committee (RGC) of the Hong Kong Special Administrative Region GovernmentPolyU 5320/07E
The Hong Kong Polytechnic UniversityG-YE14
G-YE54
1-BB7U
Funding Information:

The authors wish to thank Prof. L. G. Tham of the Department of Civil Engineering of The University of Hong Kong, Dr. A. S. K Au of Benaim Group, and the technical staff of Barbican Construction Co., Ltd., for their assistance in the field pullout tests. The constructive suggestions of Mr. Terence C. F. Chan of the Geotechnical Engineering Office of the Civil Engineering and Development Department of the Government of Hong Kong Special Administrative Region and Mr. Ronald P. M. Li of Jacobs China, Limited, are acknowledged. Financial support of the Research Grants Committee (RGC) of the Hong Kong Special Administrative Region Government under Grant No. PolyU 5320/07E and The Hong Kong Polytechnic University under Grant Nos. G-YE14, G-YE54, and 1-BB7U are gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorZhu, HHen_HK
dc.contributor.authorYin, JHen_HK
dc.contributor.authorYeung, ATen_HK
dc.contributor.authorJin, Wen_HK
dc.date.accessioned2011-07-27T01:27:21Z-
dc.date.available2011-07-27T01:27:21Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Geotechnical And Geoenvironmental Engineering, 2011, v. 137 n. 7, p. 633-642en_HK
dc.identifier.issn1090-0241en_HK
dc.identifier.urihttp://hdl.handle.net/10722/135053-
dc.description.abstractGlass fiber-reinforced polymer (GFRP) materials provide practical solutions to corrosion and site-maneuvering problems for civil infrastructures using conventional steel bars as reinforcements. In this study, the feasibility of using GFRP soil nails for slope stabilization is evaluated. The GFRP soil nail system consists of a GFRP pipe installed by the double-grouting technique. Two field-scale pullout tests were performed at a slope site. Fiber Bragg grating (FBG) sensors, strain gauges, linear variable displacement transformers (LVDTs), and a load cell were used to measure axial strain distributions and pullout force-displacement relationships during testing. The pullout test results of steel soil nails at another slope site are also presented for comparison. It is proven that the load transfer mechanisms of GFRP and steel soil nails have certain difference. Based on these test results, a simplified model using a hyperbolic shear stress-strain relationship was developed to describe the pullout performance of the GFRP soil nail. A parametric study was conducted using this model to study some factors affecting the pullout behavior of GFRP soil nails, including nail diameter, shear resistance of soil-grout interface, and ratio of interface shear coefficient to the Young's modulus of the nail. The results indicate that the GFRP soil nail may exhibit excessive pullout displacement and thus a lower allowable pullout resistance than with the steel soil nail. © 2011 American Society of Civil Engineers.en_HK
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/gt.htmlen_HK
dc.relation.ispartofJournal of Geotechnical and Geoenvironmental Engineeringen_HK
dc.subjectFiber reinforced polymeren_HK
dc.subjectFiberglassen_HK
dc.subjectPullouten_HK
dc.subjectSoil nailingen_HK
dc.subjectTestsen_HK
dc.titleField pullout testing and performance evaluation of GFRP soil nailsen_HK
dc.typeArticleen_HK
dc.identifier.emailYeung, AT:yeungat@hkucc.hku.hken_HK
dc.identifier.authorityYeung, AT=rp00203en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)GT.1943-5606.0000457en_HK
dc.identifier.scopuseid_2-s2.0-79960095180en_HK
dc.identifier.hkuros187455en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79960095180&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume137en_HK
dc.identifier.issue7en_HK
dc.identifier.spage633en_HK
dc.identifier.epage642en_HK
dc.identifier.isiWOS:000292517800001-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhu, HH=36151595800en_HK
dc.identifier.scopusauthoridYin, JH=24482633500en_HK
dc.identifier.scopusauthoridYeung, AT=7102390361en_HK
dc.identifier.scopusauthoridJin, W=35229885400en_HK

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