209 research outputs found

    Representações das subjetividades femininas em Babel bárbara, de Cristina Peri Rossi

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    IX Congresso Brasileiro de Hispanistas realizado nos dias 22 a 25 agosto 2016Em seu poemário Babel bárbara (1991), a escritora uruguaia Cristina Peri Rossi empreende uma busca pela mulher arquetípica e original, anterior à cultura patriarcal. Para tanto, a autora propõe a construção de uma linguagem simbólica feminina oposta à lógica falogocêntrica. Ao longo do poemário, que parodia o ritmo lento e grandiloquente que caracteriza a ritualidade religiosa, evidenciase o desejo do eupoético em nomear o que pertence à ordem simbólica: Babel, deusa da linguagem poética, é um ser ambíguo que se nutre de diversos mitos e de suas interpretações simbólicas, reunindo o desde o mito da Deusa Terra até o mito do nascimento da linguagem. Em nosso trabalho, pretendemos analisar como a autora subverte e ressignifica o discurso mitopoético por meio da linguagem neobarroca, assim como reconstitui uma subjetividade primordial, centrada no feminino, contrapondose às teorizações de Lacan, que nega ao feminino qualquer protagonismo ontológico. Para tanto, contaremos com o apoio da crítica de Luce Irigaray (1985) sobre os pressupostos de Lacan, dos estudos de gênero de Judith Butler (1990), bem como das teorizações de Severo Sarduy (1972) sobre o neobarrocoUNILA­-UNIOEST

    Investigation on compressive behaviour of tuff masonry panels

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    Existing buildings and cultural heritage in the Mediterranean area are commonly composed by tuff masonry made by squared or roughly squared tuff stones. The Neapolitan yellow tuff, in particular, is a high porous volcanic stone that has been widely used as a building material to forge traditional and monumental architecture in the Campania Region. Recent building codes focus their attention on the quantitative evaluation of the performance of existing structures under different limit states. In this context, it is evident that the availability of experimental data is of paramount importance for the vulnerability assessment and performance upgrading of existing tuff constructions. This paper reviews the experimental research carried out on medium-large yellow tuff masonry panels with single and multiple-leaf cross sections. The main target of the current work is to develop an extensive database on material data and mechanical properties of tuff masonry, in the light of recent test results. Based on the collected data, the reliability of available empirical-based relationships for estimation of strength and elastic stiffness of base materials and masonry was investigated. Moreover, the reference values of compressive strength and Young’s modulus given by the Instructions to the Italian Technical Code, 2009 for soft stone masonry, have been compared against available data, and the main results are presented

    In-plane behavior of tuff masonry panels strengthened with FRP diagonal layout

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    The present paper deals with a quantitative analysis of the shear strength behavior of masonry panels strengthened with diagonal layout. The objective of the study is to progress towards understanding the shear strength contributions from masonry and FRP to the lateral resistance of strengthened panels. To this aim, relevant experimental results of monotonic shear-compression tests are analyzed. The local behavior of the reinforcement is investigated in terms of FRP strain profiles (i.e. the transferrable tension force within FRP), and its effects on the global response of the panels assessed. The experimental results show the effectiveness of the anchorage system in restraining the FRP at the anchored edges, avoiding premature failure due to FRP debonding. As a result, the specimens were allowed to develop their full lateral resistance. A truss model approach, combined with a proper masonry strength criterion for masonry is proposed and validated. A comparison between computed and experimental data confirms the validity of the procedure in view of practical applications and code recommendations

    Mechanical properties of tuff and calcarenite stone masonry panels under compression

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    A significant number of historic and monumental buildings located in Mediterranean areas, and in particular in South-central Italy, are characterized by soft stone masonry, i.e. tuff or calcarenite. Many are exposed to seismic risk, so that a reference data base in terms of mechanical properties is of paramount importance in seismic assessment of this type of masonry structures. Over the past decades, relevant experimental research has been carried out on masonry panels that represent traditional arrangements. Investigations on their in-plane response under compression, shear and combined shear-compression loading are available. In the present work, a systematic interpretation of available data is carried out with reference to compressive behaviour of tuff and calcarenite stone masonry. The aim is to widen our knowledge about large single and multiple-leaf panel response. Results can be used to validate the estimation of mechanical properties in view of nonlinear analyses of historic masonry structures

    Meso-scale three-dimensional modeling of bond in FRP-strengthened masonry

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    Performance of masonry elements externally strengthened with fiber reinforced polymers (FRPs) is intrinsically dependent on the bond behavior between the composite material and masonry substrate. Therefore, a sound understanding of the interface behavior is crucial at the design stage. In this paper, a three-dimensional model based on the smeared crack modeling approach is presented for investigating the bond behavior in FRP-strengthened masonry elements. The threedimensional aspects of bond behavior in FRP- strengthened masonry elements are investigated. Moreover, the effect of mortar joints in the bond behavior of strengthened masonry prisms is studie

    Simplified numerical analysis of bond degradation of FRP-masonry systems for durability purposes

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    Fiber Reinforced Polymers have become a popular material for external strengthening of masonry structures in the last years, but still further investigations are needed in order to develop appropriate design procedures. Investigating the behaviour and performance of retrofitted masonry elements with FRP composite sheets requires considering different mechanisms and issues. Among them, the most important is the bond between FRP and substrate due to its function in transferring the stresses from the FRP sheets to the structure. Hence, conducting experimental and numerical studies for understanding the bond and its degradation mechanism due to environmental exposure is a critical subject in predicting the performance of strengthened structures. As the available information on the durability of bond in FRP retrofitted masonry elements is still rare, conducting extensive experimental and numerical studies for characterizing this phenomenon is an important issue. This paper presents a simple degradation model into an available interface model for investigating the bond degradation in retrofitted masonry elements. For this reason, at first the interface model is calibrated with the experimental tests performed at University of Minho, and then the degradation of the bond is implemented in this model through a simplified approach

    Moisture effects on the bond strength of FRP-masonry elements

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    Moisture exposure has been observed to be one of the degrading environmental agents which affects the durability of the FRP-strengthened elements by changing the constituent material or bond properties. This paper presents the experimental investigation on the effects of moisture on the pull-off bond strength of GFRP-strengthened brick specimens. The specimens have been prepared following the wet lay-up procedure and exposed to constant moisture level of 100% R.H. at 23̊C for 8 weeks. The degradation in the bond performance has been investigated by performing pull-off tests on the conditioned specimens after 4 and 8 weeks of exposure. The reversibility of the bond degradation has been also studied by storing some specimens in the laboratory conditions for 1 week after conditioning and before performing the pull-off tests. Comparative analysis has been performed and the main results are presented and discussed

    Shear capacity assessment of tuff panels strengthened with FRP diagonal layout

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    A quantitative analysis of the in-plane shear capacity of tuff masonry panels externally reinforced with FRP diagonal layout has been carried out. The objective is to provide a rational approach to the definition of the contributions from masonry and FRP to the lateral in-plane resistance of strengthened panels. Relevant experimental results of monotonic shear-compression tests are carefully analysed. A truss model approach, combined with a proper masonry strength criterion for masonry is proposed and validated. A comparison between computed and experimental data confirms the validity of the procedure in view of practical applications and code recommendations

    A Case Study on the Application and Implementation of Positive Behavioral Interventions and Supports for Students with Emotional Disabilities in Alternative Education

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    Alternative educational settings are serving students with emotional disabilities (ED) at an increasing rate; however, there a paucity of research examining the effectiveness of these programs. A review of the existing literature targeting students with problematic behaviors, supports the use of a positive, preventative, proactive, and systematic approaches such as the three-tiered, Positive Behavioral Interventions and Support (PBIS) framework. Although findings suggest that the PBIS framework is associated with favorable outcomes for students with ED in both traditional and nontraditional settings, few studies have explicitly examined whether PBIS can be effectively modified to fit the needs of students with ED in alternative education settings. As such, the current qualitative study aimed to address these gaps in the related literature by examining how and why PBIS was effective for students with ED in alternative education. A single case-study design was used to collect evidence of PBIS implementation for students in this population from the direct interviews of five staff members, archival school records, and PBIS-related documentation. Braun and Clarke’s (2006) six-step thematic analysis was used to interpret data and develop themes, resulting in the emergence of three specific themes: 1) strategies and practices; 2) data tracking: measuring progress and outcomes; and 3) systems and structures. In addition, the case study team identified nine corresponding subthemes to support these themes. Findings illustrated the specific adaptations and modifications made to the PBIS framework, contributing to the effective implementation of the strategy and meeting the needs of students in the ED population. Findings of this study provided several implications for constituents and potential future areas of research
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