The Experts below are selected from a list of 166020 Experts worldwide ranked by ideXlab platform
Bora Gencturk - One of the best experts on this subject based on the ideXlab platform.
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Structural Assessment of bridge columns with engineered cementitious composites and cu al mn superelastic alloys
Construction and Building Materials, 2019Co-Authors: Farshid Hosseini, Bora GencturkAbstract:Abstract Post-earthquake functionality of bridges is mainly affected by the residual deformations and damage level of the bridge columns. Recent earthquakes have shown that the bridge columns constructed based on current design regulations suffer large permanent deformations. Using high-performance materials such as super-elastic alloys (SEA) and engineered cementitious composites (ECC) has recently been proposed to address these issues. In this study, the performance of an innovative bridge column design incorporating ECC and Cu-Al-Mn (CAM) SEA bars is investigated under seismic loads. The behavior of ECC is simulated by introducing an experimentally calibrated constitutive model for concrete with smeared reinforcement. Additionally, a one-dimensional constitutive model is implemented to simulate the behavior of CAM SEA bars. A total of five different column configurations are modeled and the results are compared with the corresponding experimental data for validation purposes. The results are analyzed to understand the seismic behavior of these innovative columns in terms of lateral strength, post-peak degradation, permanent deformation, and shape of the hysteresis curves. Through numerical modeling, data are obtained and interpreted regarding the salient aspects of the Structural behavior of these columns that could not be obtained through experiments.
P Morer - One of the best experts on this subject based on the ideXlab platform.
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the effect of geometry on the Structural capacity of masonry arch bridges
Construction and Building Materials, 2012Co-Authors: Irma Arteaga, P MorerAbstract:Abstract This paper presents the effect of geometry on the Structural capacity of masonry arch bridges with different geometric features. This study was performed using an application (ANPAF) developed in MATLAB and based on the Linear Programming Method developed by Livesley. The geometry is read directly from an ‘a.dxf’ file, which stores the information obtained from planimetric surveying techniques. The results were compared with real and idealized geometry corresponding to each of the arches. This study aims to estimate the percentage of error that can occur in the Structural Assessment of masonry bridges by reading from different shapes as well as to estimate geometrical error.
Farshid Hosseini - One of the best experts on this subject based on the ideXlab platform.
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Structural Assessment of bridge columns with engineered cementitious composites and cu al mn superelastic alloys
Construction and Building Materials, 2019Co-Authors: Farshid Hosseini, Bora GencturkAbstract:Abstract Post-earthquake functionality of bridges is mainly affected by the residual deformations and damage level of the bridge columns. Recent earthquakes have shown that the bridge columns constructed based on current design regulations suffer large permanent deformations. Using high-performance materials such as super-elastic alloys (SEA) and engineered cementitious composites (ECC) has recently been proposed to address these issues. In this study, the performance of an innovative bridge column design incorporating ECC and Cu-Al-Mn (CAM) SEA bars is investigated under seismic loads. The behavior of ECC is simulated by introducing an experimentally calibrated constitutive model for concrete with smeared reinforcement. Additionally, a one-dimensional constitutive model is implemented to simulate the behavior of CAM SEA bars. A total of five different column configurations are modeled and the results are compared with the corresponding experimental data for validation purposes. The results are analyzed to understand the seismic behavior of these innovative columns in terms of lateral strength, post-peak degradation, permanent deformation, and shape of the hysteresis curves. Through numerical modeling, data are obtained and interpreted regarding the salient aspects of the Structural behavior of these columns that could not be obtained through experiments.
Susan M Bogus - One of the best experts on this subject based on the ideXlab platform.
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evaluation of novel jointless engineered cementitious composite ultrathin whitetopping ecc utw overlay
Construction and Building Materials, 2020Co-Authors: Ricardo Hungria, Gabriel Arce, Marwa M Hassan, Michele Anderson, Moinul Mahdi, Tyson Rupnow, Susan M BogusAbstract:Abstract The objective of this study was to evaluate the construction, material characterization, initial Structural Assessment, and cost of a novel jointless Engineered Cementitious Composite Ultra-Thin Whitetopping (ECC-UTW) overlay. After construction, early-age cracks (from less than 0.25 mm to up to 2.54 mm width) were observed in the 101.6-mm (4 in.) jointless ECC-UTW section; yet, the majority of the cracks coincided with areas where fiber clumps were observed during construction and places of heavy instrumentation. On the other hand, no cracks were observed in the 63.5-mm (2.5 in.) jointless ECC-UTW at early ages; yet, when winter arrived, micro-cracks (
Peña Fernando - One of the best experts on this subject based on the ideXlab platform.
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Structural Assessment of gravity dams by means of a semi-discrete approach
'Scipedia S.L.', 2019Co-Authors: Peña FernandoAbstract:A new numerical model for the Structural Assessment of gravity dams by means of a semidiscrete approach is proposed. Gravity dams are massive structures, which their stability depends on the gravity loads applied into the structure. Mainly, its Structural Assessment is performed by means of a gravity approach. However, this approach is too conservative and mostly does not reflect the real Structural behaviour of the dam. In this context, there is the need of models that are simplified enough to allow a simple and fast parametric analyses. The proposed model idealizes the dam as a set of rigid elements, where the damage and the deformation are concentrated in the contact sides between adjacent elements. Thus, the elements are rigid, but the material is considered as deformable. As the proposed model is semi-discrete, it can detect separation or sliding between elements. However, initial contacts do not change during the analyisis and a relative continuity among elements exists, in order to simplify the computational effort. The effective performance of the proposed model is demonstrated by numerical validation and by comparisons with some numerical models presented in the literature.Peer Reviewe
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Structural Assessment of gravity dams by means of a semi-discrete approach
2019Co-Authors: Peña FernandoAbstract:A new numerical model for the Structural Assessment of gravity dams by means of a semi-discrete approach is proposed. Gravity dams are massive structures, which their stability depends on the gravity loads applied into the structure. Mainly, its Structural Assessment is performed by means of a gravity approach. However, this approach is too conservative and mostly does not reflect the real Structural behaviour of the dam. In this context, there is the need of models that are simplified enough to allow a simple and fast parametric analyses. The proposed model idealizes the dam as a set of rigid elements, where the damage and the deformation are concentrated in the contact sides between adjacent elements. Thus, the elements are rigid, but the material is considered as deformable. As the proposed model is semi-discrete, it can detect separation or sliding between elements. However, initial contacts do not change during the analyisis and a relative continuity among elements exists, in order to simplify the computational effort. The effective performance of the proposed model is demonstrated by numerical validation and by comparisons with some numerical models presented in the literature
