Analytical and Experimental Study of Seismic Performance of Reinforced Concrete Frames Infilled with Masonry Walls PDF Download
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Author: Andreas Stavridis
Publisher:
ISBN:
Category :
Languages : en
Pages : 372
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Book Description
Unreinforced masonry panels are often used as interior or exterior partitions in reinforced concrete frames. How infills affect the seismic performance of an RC building is an intricate issue since their exact role in the seismic load resistance is not yet clearly understood due to the interaction with the bounding frame. Assessing this role presents a challenge for structural engineers due to the variety and complexity of observed failure mechanisms and the lack of reliable methods able to capture these mechanisms. Furthermore, there is a lack of experimental data from large-scale dynamic tests of multi-story, multi-bay infilled frames to validate the analytical tools. This dissertation addresses this intricate issue with extensive analytical and experimental studies. The testing program involved quasistatic tests of small and large-scale specimens with and without openings and shake-table tests of a large-scale, three-story, two-bay, RC frame. This frame, which had a non-ductile design and was infilled with unreinforced masonry panels with openings, was the largest structure of this type tested on a shake table. The design of the specimens, the testing procedures, and the obtained results are discussed in this dissertation as they enhanced the understanding of the structural behavior. The experimental data has been used to validate the proposed analytical tools. These include a nonlinear finite element methodology and a simplified assessment tool for the engineering practice. The finite element modeling methodology combines the smeared and discrete crack approaches to capture the shear and flexural failure of RC members, crushing and splitting of brick units and the mixed-mode fracture of mortar joints. A systematic approach has been developed to calibrate the material parameters, and the comparison with the experimental results indicates it can successfully capture the nonlinear behavior of the physical specimens. The validated models have been used in parametric studies to identify the critical material parameters and assess the influence of design parameters and variations of the geometrical configurations to the structural response. The parametric studies and experimental findings have been used to develop a simplified method for the structural assessment of infilled frames. The proposed approach can estimate the structural performance, including the stiffness and strength and can be used for the construction of simple strut models for an entire structure.
Author: Andreas Stavridis
Publisher:
ISBN:
Category :
Languages : en
Pages : 372
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Book Description
Unreinforced masonry panels are often used as interior or exterior partitions in reinforced concrete frames. How infills affect the seismic performance of an RC building is an intricate issue since their exact role in the seismic load resistance is not yet clearly understood due to the interaction with the bounding frame. Assessing this role presents a challenge for structural engineers due to the variety and complexity of observed failure mechanisms and the lack of reliable methods able to capture these mechanisms. Furthermore, there is a lack of experimental data from large-scale dynamic tests of multi-story, multi-bay infilled frames to validate the analytical tools. This dissertation addresses this intricate issue with extensive analytical and experimental studies. The testing program involved quasistatic tests of small and large-scale specimens with and without openings and shake-table tests of a large-scale, three-story, two-bay, RC frame. This frame, which had a non-ductile design and was infilled with unreinforced masonry panels with openings, was the largest structure of this type tested on a shake table. The design of the specimens, the testing procedures, and the obtained results are discussed in this dissertation as they enhanced the understanding of the structural behavior. The experimental data has been used to validate the proposed analytical tools. These include a nonlinear finite element methodology and a simplified assessment tool for the engineering practice. The finite element modeling methodology combines the smeared and discrete crack approaches to capture the shear and flexural failure of RC members, crushing and splitting of brick units and the mixed-mode fracture of mortar joints. A systematic approach has been developed to calibrate the material parameters, and the comparison with the experimental results indicates it can successfully capture the nonlinear behavior of the physical specimens. The validated models have been used in parametric studies to identify the critical material parameters and assess the influence of design parameters and variations of the geometrical configurations to the structural response. The parametric studies and experimental findings have been used to develop a simplified method for the structural assessment of infilled frames. The proposed approach can estimate the structural performance, including the stiffness and strength and can be used for the construction of simple strut models for an entire structure.
Author: Austin Reese
Publisher:
ISBN:
Category :
Languages : en
Pages : 106
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Book Description
This thesis discusses the analysis of the lateral force-vs-drift relation of reinforced concrete (RC) frames with masonry infill panels under in-plane lateral loads. Such structures have been the topic of several studies due to their recurring catastrophic failures during seismic events. Due to the large number of variables that can affect their seismic performance and lead to various possible failure mechanisms there is no widely accepted method for the assessment of the structural behavior of infilled frames under seismic loads. A parametric study was performed here using detailed analytical models which provided insight to the influence of the various design parameters and material properties. The observations from the parametric study and selected experimental studies were taken into account in the development of a simplified procedure that is proposed here for the estimation of the force-vs-drift behavior of infilled frames. With the proposed method, the force-vs-drift curve for an infilled RC frame can be estimated based on the frame geometry, reinforcing details, and basic material properties. The simplified method is based upon the prediction of the expected failure pattern for an infilled frame which can be achieved using some simple to apply criteria based on the relative shear and flexural strengths of the frame and infill. Four classes have been proposed ranging from strong infill- strong frame cases to weak infill- weak frame. Each class tends to develop a different failure pattern that may include plastic hinges and/or shear failures in the columns as well as diagonal sliding and/or cracking of the infill. The framework has been validated with data from experimental and analytical studies on singlebay, single-story specimens with a wide range of geometries, design details, and material properties. The comparison of the analytical and experimental results indicates that the proposed methodology, although simplified, it can successfully capture the main features of the seismic response of infilled frames, including the initial stiffness as well as the strength and drift at the apparent yield point, peak load and onset of residual capacity.
Author: Sarhosis, Vasilis
Publisher: IGI Global
ISBN: 1522502327
Category : Technology & Engineering
Languages : en
Pages : 526
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Book Description
The Discrete Element Method (DEM) has emerged as a solution to predicting load capacities of masonry structures. As one of many numerical methods and computational solutions being applied to evaluate masonry structures, further research on DEM tools and methodologies is essential for further advancement. Computational Modeling of Masonry Structures Using the Discrete Element Method explores the latest digital solutions for the analysis and modeling of brick, stone, concrete, granite, limestone, and glass block structures. Focusing on critical research on mathematical and computational methods for masonry analysis, this publication is a pivotal reference source for scholars, engineers, consultants, and graduate-level engineering students.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Claudio Modena
Publisher: CRC Press
ISBN: 1315342669
Category : Technology & Engineering
Languages : en
Pages : 4087
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Book Description
Brick and Block Masonry - Trends, Innovations and Challenges contains the lectures and regular papers presented at the 16th International Brick and Block Masonry Conference (Padova, Italy, 26-30 June 2016). The contributions cover major topics: - Analysis of masonry structures - Bond of composites to masonry - Building physics and durability - Case studies - Codes and standards - Conservation of historic buildings - Earthen constructions - Eco-materials and sustainability - Fire resistance, blasts, and impacts - Masonry bridges, arches and vaults - Masonry infill walls and RC frames - Masonry materials and testing - Masonry repair and strengthening - New construction techniques and technologies - Reinforced and confined masonry - Seismic performance and vulnerability assessment In an ever-changing world, in which innovations are rapidly implemented but soon surpassed, the challenge for masonry, the oldest and most traditional building material, is that it can address the increasingly pressing requirements of quality of living, safety, and sustainability. This abstracts volume and full paper USB device, focusing on challenges, innovations, trends and ideas related to masonry, in both research and building practice, will proof to be a valuable source of information for researchers and practitioners, masonry industries and building management authorities, construction professionals and educators.
Author: Gaetan Kerschen
Publisher: Springer Science & Business Media
ISBN: 1461465702
Category : Technology & Engineering
Languages : en
Pages : 336
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Book Description
Topics in Nonlinear Dynamics, Volume 1: Proceedings of the 31st IMAC, A Conference and Exposition on Structural Dynamics, 2013, the first volume of seven from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: Nonlinear Oscillations Nonlinearities ... In Practice Nonlinear System Identification: Methods Nonlinear System Identification: Friction & Contact Nonlinear Modal Analysis Nonlinear Modeling & Simulation Nonlinear Vibration Absorbers Constructive Utilization of Nonlinearity
Author: Finley Allan Charney
Publisher:
ISBN:
Category : Buildings, Reinforced concrete
Languages : en
Pages : 490
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Book Description
Author: Wael Wagih El-Dakhakhni
Publisher:
ISBN:
Category : Concrete construction
Languages : en
Pages : 330
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Author: Attila Bela Beres
Publisher:
ISBN:
Category : Buildings, Reinforced concrete
Languages : en
Pages : 356
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Author: Seongwoo Jo
Publisher:
ISBN:
Category :
Languages : en
Pages : 658
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Book Description
The research described here is part of a multi-university project on "Performance-based Design of New Masonry Structures." Within the context of that project, the main objectives of this research was to study the inelastic seismic performance of low-rise concrete masonry structures with clay masonry veneer and veneer connectors; to develop analytical models for those structures and the elements comprising them; and to use the results of the research to propose refinements to current design provisions for concrete masonry with clay masonry veneer. The experimental work described here includes the design and testing of concrete masonry wall specimens with clay masonry veneer under quasi-static loading. Identical specimens were subjected to shake-table testing at another university. The experimental work described here also includes the design of a full-scale, one-story concrete masonry building specimen with clay masonry veneer. That building specimen was subjected to shake-table testing at another university. The analytical work of this research includes the development of nonlinear hysteretic models for concrete masonry walls, clay masonry veneer and veneer connectors. The analytical models for wall specimens were calibrated using the results of the quasi-static and shake-table tests of wall specimens. The analytical model for the building specimen was compared with and refined using shake-table test results for the building specimen. Finally, the calibrated and refined analytical model of the building specimen was used for parameter studies intended to supply general information about the behavior of low-rise reinforced concrete masonry structures with clay masonry veneer. Based on the these experimental and analytical results, basic concepts of the seismic response and design of low-rise concrete masonry buildings were reaffirmed; most design and construction requirements of the 2008 MSJC Code and Specification were reaffirmed; and several recommendations were made to improve those requirements.
