A5090629205- Structural Behavior of Reinforced Concrete
- Structural Load-Bearing Analysis
- Concrete Corrosion and Durability
- Probabilistic and Robust Engineering Design
- Wind and Air Flow Studies
- Structural Health Monitoring Techniques
- Structural Engineering and Vibration Analysis
- Innovative concrete reinforcement materials
- Fire effects on concrete materials
- Structural Response to Dynamic Loads
- Construction Engineering and Safety
- BIM and Construction Integration
- Tropical and Extratropical Cyclones Research
- Fire dynamics and safety research
- Hydrology and Drought Analysis
- Structural mechanics and materials
- Civil and Structural Engineering Research
- Concrete Properties and Behavior
- Concrete and Cement Materials Research
- Structural Engineering and Materials Analysis
- Geotechnical Engineering and Analysis
- Structural Analysis of Composite Materials
- Seismic Performance and Analysis
- Wind Energy Research and Development
- Education and Public Policy
Universidade Federal de Minas Gerais
2008-2024
VSB - Technical University of Ostrava
2005
University of Perugia
2005
Cornell University
2005
National Institute of Standards and Technology
2003-2005
University of Pittsburgh
2000
University of Colorado Boulder
2000
The implementation of reliability methods for designing new structures and assessing the safety evaluating performance existing infrastructure systems has gained widespread acceptance. Consequently, reliability-based design specifications in form load resistance factor (LRFD) have dominated development current codes standards. This paper reviews criteria used to calibrate evaluation standards strength, serviceability, fatigue structural components. review shows that large differences exist...
High-strength concrete (HSC) has found its main application in the lower columns of high-rise buildings. Due to large application, type failure, and importance structural integrity, reliability assessment HSC is an extremely important issue. On other hand, this a very involved First, unique formulation failure criterion not yet been established. Second, moment magnification method, when applied slender columns, may produce conservative or unconservative estimates load effects depending on...
Database-assisted design (DAD) for wind results in structures with reduced material consumption and failure risks, i.e., improved safety sustainability. The paper presents a DAD-compatible probabilistic procedure estimating: (1) Wind effects corresponding to any mean recurrence interval of the speeds, (2) wind-load factors. Unlike ASCE 7 Standard earlier structural reliability estimates, accounts inherent randomness estimation peaks relevant wind-related knowledge uncertainties. On basis...
A basic step in the reliability evaluation of high-strength concrete (HSC) columns is computation statistics column strength. However, nonexistence a widely accepted model for confined HSC, unavailability closed-form solution to express strength, and compatibility with assumed failure criterion make strength HSC very involved issue. In present study, are assessed using Monte Carlo simulation. Confinement models compared deterministic procedure developed. The 48 reinforced representing...
Peak values in time histories of wind effects may be obtained by using the entire information inherent series effect, a method entailing estimation probability distribution peak through application classical Rice procedure extended for non-Gaussian histories. We present estimates sampling errors this method. These are needed structural reliability calculations and decisions on requisite length tunnel pressure records, especially database-assisted design. If based analysis 1-h-long records...
Purpose To evaluate the temperature-dependency of Young’s and shear moduli concrete after exposure to moderately elevated temperatures using non-destructive impulse excitation technique (IET). Design/methodology/approach The study involved heating up 225 °C measuring dynamic excitation, which measures natural vibration frequency from a mechanical received by an acoustic sensor. effects temperature on were analysed importance spatial variability measured values was also verified. Findings...
The basic problem of structural reliability is to ascertain that the strength R will be larger than load (or effects) S throughout useful life structure. Due uncertainties in determination and loads, can only established probabilistic terms, i.e., P(R > S). For real structures this a complex issue, as every guidance needed design process which provided through technical standards codes. Current codes (e.g. ASCE-SEI 7, ACI 318) are based on semi-probabilistic approaches. While it agreed ideal...
The methodology for estimating wind effects presented in this paper is based on the database-assisted design approach. It accounts of directionality, uncertainties parameters that determine effects, and building orientation. yields estimates are far more realistic than those conventional code approach, which disregards parameters, as well directionality orientation, or these through use a blanket reduction factor. pilot software calculations first step toward modern computer-intensive...
Utilisation of carbon fibre-reinforced polymers (CFRP), for confinement concrete, has proved to be a viable alternative in the strengthening reinforced concrete (RC) columns with circular cross-sections. However, large research effort is still necessary order select analytical models that properly estimate ultimate strength and strain RC confined by FRP transversal steel (FRP-RC). Different have been proposed, but most available FRP-confinement validated experimental results cylinders plain...
This study represents one of the first few attempts to systematically assess reliability high-strength concrete (HSC) columns designed according American Concrete Institute (ACI) Code provisions. In this study, both short and slender HSC is assessed using a hybrid probabilistic approach. approach combines Monte Carlo simulation with order method. The 48 reinforced ACI evaluated. effects compressive strength, amount confining steel, longitudinal slenderness, live dead load ratio are examined....
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O confinamento de colunas circulares em concreto armado (CA) utilizando polímero reforçado com fibras carbono (PRFC) é uma técnica que vem sendo amplamente utilizada no reforço existentes. A escolha dessa na recuperação/reforço tais elementos justificada pela alta eficiência do sistema e facilidade execução, dentre outras vantagens. Nesse contexto, o desenvolvimento normas técnicas para CA confinadas por PRF (CA-PRF) se faz necessário. Essas devem seguir um arcabouço similar àquele associado...
Os grandes avanços tecnológicos ocorridos nas últimas décadas relativos às estruturas de concreto têm conduzido a elementos mais esbeltos e maiores vãos. Nesses casos, o tratamento dos efeitos segunda ordem em pilares cálculo flechas lajes vigas armado demandam quantificação do módulo elasticidade concreto. Esta é usualmente feita através expressões simplificadas estabelecidas normas técnicas pertinentes. Entretanto, incertezas não desprezíveis estão associadas aos modelos normativos para A...
A ABNT NBR 6118 (2023) apresenta expressões que relacionam a resistência à tração do concreto sua característica compressão. Diversas pesquisas têm sido desenvolvidas em todo o Brasil com intuito de aprimorar essas relações, proporcionando previsões mais precisas. Neste contexto, objetivo deste trabalho é contribuir para esse esforço. Para tanto, foi compilado um banco dados abrangente contendo resultados ensaios realizados território nacional. Esses incluem compressão e por diametral...