Publications

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2008
Post-punching behaviour of prestressed concrete flat slabs, Ramos, Pinho A., and Lúcio V. J. G. , Magazine of Concrete Research, Volume 60, Number 4, p.245–251, (2008) AbstractWebsite

The progressive collapse of structures generally results in the loss of human lives. Experience shows that flat slab structures are very sensitive to progressive collapse, which may cause serious accidents if special detailing is not provided. The post-punching behaviour of a column-supported slab is decisive in the progressive collapse development. This work presents the experimental research carried out to study the post-punching behaviour of prestressed concrete flat slabs. Six reduced-scale prestressed concrete flat slab models were tested. The tests were carried out in two different phases. In the first phase the models were loaded up to failure by punching. Afterwards, the models were loaded again to study the post-punching behaviour changes caused by the presence of unbonded, prestressed tendons and the influences of their distance to the column.

Reforço de Lajes Fungiformes – Anomalias, Causas e Soluções, Lúcio, Válter, Ramos António, and Faria Duarte , SILE2008 – Seminário Internacional sobre Ligações Estruturais, Lisbon, p.1–10, (2008) Abstract

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Rehabilitation of Historical Masonry Bridges, Rodrigues, Neuza, Ramos António, and Branco Fernando , 1st International Conference Construction Heritage in Coastal and Marine Environments – Damage, Diagnostic, Maintenance and Rehabilitation, Lisbon, p.1–10, (2008) Abstract

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Strengthening of flat slabs with transverse reinforcement, Duarte, Inácio, Ramos António M. P., and Lúcio Válter J. G. , Proceedings of CCC, Porto, (2008) Abstract

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2007
Comportamento Pós-Rotura de Lajes Fungiformes Pré Esforçadas, Ramos, António Pinho, and Lúcio Válter , Revista Portuguesa de Engenharia de Estruturas, Volume 1, Number Série II, p.5–14, (2007) Abstract

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2006
Resistência ao Punçoamento de Lajes Fungiformes Pré-Esforçadas - Método Alternativo de Cálculo, Ramos, António, and Lúcio Válter , Revista Internacional Construlink, Volume 4, p.4–14, (2006) Abstract

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Safety on Punching of Prestressed Flat Slabs, Ramos, António, and Lúcio Valter , fib congress 2006, Naples, (2006) Abstract

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2004
Estudo Experimental de Punçoamento em Lajes Fungiformes Pré Esforçadas, a Ramos, and Lúcio V. , Encontro Nacional Betão Estrutural 2004, Porto, (2004) Abstract

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2003
Punçoamento em Lajes Fungiformes Pré-Esforçadas, Ramos, António , IST-UTL, Lisbon, (2003) Abstract

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2000
Punching of prestressed flat slabs: Experimental analysis, Ramos, A. M. P., and Lúcio V. J. G. , International Workshop on Punching Shear Capacity of RC Flat Slabs, Volume 57, Stockholm, p.441–448, (2000) Abstract

The experimental analysis of nine prestressed flat slab models under punching is described and the results are compared with the recommendations of EC2 and MC90. The tests were performed on specimens at a scale 1/3, prestressed with unbonded high strength steel. In the first set, the specimens (AR2 to AR5 and AR7) were only subjected to in-plane compression, to evaluate the effect of the in-plane forces on the punching resistance. The second set of tests (AR8 to AR11) intended to study the effect of the vertical component of the tendon forces near the column in the punching resistance. This work aims to improve the understanding of the behaviour of prestressed flat slabs under punching load and the evaluation of the punching resistance.

Repair and Strengthening Methods of Flat Slabs for Punching, Ramos, Antonio, Lucio Valter, and Regan Paul E. , International Workshop on Punching Shear Capacity of RC Flat Slabs, Stockholm, p.125–133, (2000) Abstract

The present work reports experimental research carried out on repair and strengthening methods of flat slabs for punching. The repair and strengthening methods studied are: strengthening using transversal prestress, repair by substitution of the damaged concrete; and strengthening using steel beams as a column head, connected to the column and to the slab with epoxy resin and mechanical expansion anchors. Four experimental test slabs (AR1 to AR4) were produced and tested: two with transversal prestress, one only repaired and one strengthened with a steel column head. The execution process, its efficiency and design, are discussed.

Reparação e Reforço do Viaduto do Fonte Nova, Ramos, A. M. P. e Lúcio, V. , Encontro Nacional Betão Estrutural 2000, Porto, (2000) Abstract

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1996
Reforço de Lajes Fungiformes ao Punçoamento com Perfis Metálicos, Ramos, A. M. P. e Lúcio, V. , 6º Encontro Nacional sobre Estruturas Pré-esforçadas, Lisbon, (1996) Abstract

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1995
Reparação e Reforço de Lajes Fungiformes ao Punçoamento, Ramos, António , IST-UTL, Lisbon, (1995) Abstract

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1994
Análise Experimental de Técnicas de Reparação e Reforço ao Punçoamento, Ramos, A. M. P. e Lúcio, V. , 5º Encontro Nacional sobre Estruturas Pré-esforçadas, Porto, (1994) Abstract

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