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Design guidelines and full-scale verification for MSE walls with traffic barriers / K.-M. Kim in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 6 (Juin 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 690–699 Titre : Design guidelines and full-scale verification for MSE walls with traffic barriers Type de document : texte imprimé Auteurs : K.-M. Kim, Auteur ; J.-L. Briaud, Auteur ; R. Bligh, Auteur Année de publication : 2012 Article en page(s) : pp. 690–699 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : AASHTO  load  and  resistance  factor  design  (LFRD)  Mechanically  stabilized  earth  (MSE)  wall  Traffic  barriers  Design  guideline Résumé : Millions of square meters of mechanically stabilized earth (MSE) retaining walls are constructed annually in the United States. For highway applications, a roadside barrier system is placed at the edge of the wall. This barrier system generally consists of an L-shape concrete structure so that if a vehicle hits the vertical part of the L shape (barrier), the horizontal part of the L (moment slab) provides the resisting moment during the impact. This impact must be resisted by the soil, the reinforcement, and the panels in the MSE wall. This paper gives guidelines on how to design the reinforcement for pullout and yielding and the panels for flexural and shear failure. It also gives the guidelines on how to ensure the stability of the barrier. These design guidelines are developed in terms of AASHTO load and resistance factor design procedures. In a second part, a full-scale crash test on an instrumented 2.79 m high MSE wall is described and analyzed. The wall and barrier behaved very satisfactorily and represented a verification of the proposed guidelines. Pressure distributions are presented for designing the top two layers of wall reinforcement to resist barrier impact forces. A 44.5-kN static equivalent load is recommended for evaluating the stability of the barrier and moment slab system. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000642 [article] Design guidelines and full-scale verification for MSE walls with traffic barriers [texte imprimé] / K.-M. Kim, Auteur ; J.-L. Briaud, Auteur ; R. Bligh, Auteur . - 2012 . - pp. 690–699. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 690–699 Mots-clés : AASHTO  load  and  resistance  factor  design  (LFRD)  Mechanically  stabilized  earth  (MSE)  wall  Traffic  barriers  Design  guideline Résumé : Millions of square meters of mechanically stabilized earth (MSE) retaining walls are constructed annually in the United States. For highway applications, a roadside barrier system is placed at the edge of the wall. This barrier system generally consists of an L-shape concrete structure so that if a vehicle hits the vertical part of the L shape (barrier), the horizontal part of the L (moment slab) provides the resisting moment during the impact. This impact must be resisted by the soil, the reinforcement, and the panels in the MSE wall. This paper gives guidelines on how to design the reinforcement for pullout and yielding and the panels for flexural and shear failure. It also gives the guidelines on how to ensure the stability of the barrier. These design guidelines are developed in terms of AASHTO load and resistance factor design procedures. In a second part, a full-scale crash test on an instrumented 2.79 m high MSE wall is described and analyzed. The wall and barrier behaved very satisfactorily and represented a verification of the proposed guidelines. Pressure distributions are presented for designing the top two layers of wall reinforcement to resist barrier impact forces. A 44.5-kN static equivalent load is recommended for evaluating the stability of the barrier and moment slab system. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000642