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Featured researches published by H. Pereira.


International Journal of Architectural Heritage | 2018

Seismic behavior of two Portuguese adobe buildings: Part I - in-plane cyclic testing of a full-scale adobe wall

Dora Silveira; Humberto Varum; Aníbal Costa; H. Pereira; Laura Sarchi; Ricardo Monteiro

ABSTRACT This article addresses the laboratory testing of a full-scale double-T shaped adobe wall, under in-plane horizontal cyclic loading of increasing amplitude, with the aim of contributing to the understanding of the seismic behavior of adobe structures. The wall was built with lime adobes taken from an existing building and mortar with a traditional composition. The behavior of the wall was assessed in terms of: shear stress versus horizontal drift and moment versus rotation relationships; maximum lateral strength; drift and rotation at peak stress; evolution of stiffness, lateral displacements, dissipated energy, and natural frequency; and damage pattern. The wall exhibited brittle behavior and in-plane strength corresponding to 56% of the vertical load. Cracking was observed with an X-shaped pattern whereas no sliding occurred at its base. This research supported the subsequent development of a repair and retrofit solution and also of numerical models to simulate the seismic behavior of two adobe buildings.


Frattura ed Integrità Strutturale | 2014

Numerical simulation of galvanized rebars pullout

H. Pereira; Vitor M. C. F. Cunha; José Sena-Cruz

The usage of rebars in construction is the most common method for reinforcing plain concrete and thus bridging the tensile stresses along the concrete crack surfaces. Usually design codes for modelling the bond behaviour of rebars and concrete suggest a local bond stress - slip relationship that comprises distinct reinforcement mechanisms, such as adhesion, friction and mechanical anchorage. In this work, numerical simulations of pullout tests were performed using the finite element method framework. The interaction between rebar and concrete was modelled using cohesive elements. Distinct local bond laws were used and compared with ones proposed by the Model Code 2010. Finally an attempt was made to model the geometry of the rebar ribs in conjunction with a material damaged plasticity model for concrete.


Construction and Building Materials | 2012

Mechanical properties of adobe bricks in ancient constructions

Dora Silveira; Humberto Varum; Aníbal Costa; Tiago Martins; H. Pereira; João Almeida


AdobeUSA 2007 | 2007

Structural behaviour assessment and material characterization of traditional adobe constructions

Humberto Varum; A. Costa; Dora Silveira; H. Pereira; João Almeida; Tiago Martins


Mecânica Experimental: revista da Associação Portuguesa de Análise Experimental de tensões | 2008

Caracterização do comportamento estrutural de paredes de alvenaria de adobe

Humberto Varum; A. Costa; H. Pereira; João Almeida; Hugo Rodrigues


V Seminário de Arquitectura de Terra em Portugal | 2007

Caracterização experimental do comportamento diferido de alvenaria de adobe

Daniel V. Oliveira; Humberto Varum; Rui André Martins Silva; H. Pereira; Paulo B. Lourenço; Aníbal Costa


III Congreso Internacional de Arquitectura de Tierra: Tradición y Innovacón | 2006

Avaliação experimental do comportamento estrutural de elementos resistentes em alvenaria de adobe

Humberto Varum; A. Costa; H. Pereira; João Almeida; Hugo Rodrigues


V Seminário de Arquitectura de Terra em Portugal | 2007

Avaliação experimental do comportamento fora do plano de paredes de alvenaria de adobe

Aníbal Costa; Humberto Varum; H. Pereira; Hugo Rodrigues; Romeu Vicente; António Arêde; Alexandre A. Costa


MATERIAIS 2007 – 13th Conference of Sociedade Portuguesa de Materiais / IV International Materials Conference Symposium – A Materials Science Forum: “Global Materials for the XXI Century: Challenges to Academia and Industry” | 2007

Mechanical characterization of adobe masonry walls

Humberto Varum; A. Costa; H. Pereira; João Almeida; Dora Silveira


TerraBrasil 2006: I Seminário Arquitetura e Construção com Terra no Brasil / IV Seminário Arquitectura de Terra em Portugal | 2006

Comportamento estrutural de elementos resistentes em alvenaria de adobe

Humberto Varum; A. Costa; H. Pereira; João Almeida

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A. Costa

Instituto Militar de Engenharia

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Hugo Rodrigues

Polytechnic Institute of Leiria

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A. Costa

Instituto Militar de Engenharia

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