Structural Behaviour of Masonry Walls Stregthened with Mortar Layers Reinforced with FRP Grids PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Structural Behaviour of Masonry Walls Stregthened with Mortar Layers Reinforced with FRP Grids PDF full book. Access full book title Structural Behaviour of Masonry Walls Stregthened with Mortar Layers Reinforced with FRP Grids by Angelo Garofano. Download full books in PDF and EPUB format.
Author: Angelo Garofano
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The seismic events recently occurred all over the world and, in particular, in Europe have shown the high vulnerability of particular classes of buildings against the horizontal actions. The damage of structural masonry walls is one of the most widespread harming injuries and cause of loss of serviceability and seismic capacity for a building. The damage experienced by these masonry elements has brought to light the necessity to strengthen them with appropriate reinforcing systems in order to achieve an upgrading to the necessary seismic and energy dissipation capacity. Different strengthening systems have been proposed and studied during the last decades, with particular reference to the type of materials, system configuration with respect to the element to be strengthened, difficulties in the application and effectiveness of the reinforcement. Even though in the last years different studies have been carried out in this field, many issues regarding the methods for the evaluation of the actual behaviour of these techniques, and their effectiveness in the improvement of seismic behaviour of structural members to which they are applied, are still open. In the present study the structural behaviour of unreinforced masonry walls strengthened with composite grid reinforced mortar layers is studied. The characterization of the reinforcing system and the assessment of the overall increase of capacity of the strengthened masonry walls is performed. First of all, the study is focused on the investigation of the mechanical characteristics of the strengthening system in itself. In fact, the structural behaviour of an externally applied strengthening system for masonry walls is examined. The reinforcing technique considered in the present research is composed by mortar layers incorporating a FRP reinforcement in form of grid. The FRP reinforced mortar layers are externally applied to the wall surfaces in a symmetric fashion, and can also be connected to the wall by means of an adequate connection system. The mechanical behaviour of the reinforced mortar under tensile, compression and shear loading is assessed through laboratory tests and constitutive laws can be proposed to characterize the reinforced mortar mechanical behaviour. The experimental characterization of the presented system is followed by and validated through numerical modelling and simulation of its mechanical behaviour. In a second phase, the behaviour of masonry walls strengthened by means of the considered technique is studied. The in-plane shear behaviour is considered, in case of cyclic loading state. The performances of the global strengthened assemblage is thus examined with both experimental and numerical investigation criteria. Also, the overall ductility and energy dissipation capacity of the system, while subjected to horizontal in-plane actions, is studied. The actual mechanical behaviour of the proposed structural solution is investigated through an experimental program with prototypes. Furthermore, a finite element model is realized in order to replicate the structural features of the strengthened masonry wall. The finite element model can be also used for further validation of the panels performances.
Author: Angelo Garofano
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The seismic events recently occurred all over the world and, in particular, in Europe have shown the high vulnerability of particular classes of buildings against the horizontal actions. The damage of structural masonry walls is one of the most widespread harming injuries and cause of loss of serviceability and seismic capacity for a building. The damage experienced by these masonry elements has brought to light the necessity to strengthen them with appropriate reinforcing systems in order to achieve an upgrading to the necessary seismic and energy dissipation capacity. Different strengthening systems have been proposed and studied during the last decades, with particular reference to the type of materials, system configuration with respect to the element to be strengthened, difficulties in the application and effectiveness of the reinforcement. Even though in the last years different studies have been carried out in this field, many issues regarding the methods for the evaluation of the actual behaviour of these techniques, and their effectiveness in the improvement of seismic behaviour of structural members to which they are applied, are still open. In the present study the structural behaviour of unreinforced masonry walls strengthened with composite grid reinforced mortar layers is studied. The characterization of the reinforcing system and the assessment of the overall increase of capacity of the strengthened masonry walls is performed. First of all, the study is focused on the investigation of the mechanical characteristics of the strengthening system in itself. In fact, the structural behaviour of an externally applied strengthening system for masonry walls is examined. The reinforcing technique considered in the present research is composed by mortar layers incorporating a FRP reinforcement in form of grid. The FRP reinforced mortar layers are externally applied to the wall surfaces in a symmetric fashion, and can also be connected to the wall by means of an adequate connection system. The mechanical behaviour of the reinforced mortar under tensile, compression and shear loading is assessed through laboratory tests and constitutive laws can be proposed to characterize the reinforced mortar mechanical behaviour. The experimental characterization of the presented system is followed by and validated through numerical modelling and simulation of its mechanical behaviour. In a second phase, the behaviour of masonry walls strengthened by means of the considered technique is studied. The in-plane shear behaviour is considered, in case of cyclic loading state. The performances of the global strengthened assemblage is thus examined with both experimental and numerical investigation criteria. Also, the overall ductility and energy dissipation capacity of the system, while subjected to horizontal in-plane actions, is studied. The actual mechanical behaviour of the proposed structural solution is investigated through an experimental program with prototypes. Furthermore, a finite element model is realized in order to replicate the structural features of the strengthened masonry wall. The finite element model can be also used for further validation of the panels performances.
Author: Claudio Modena
Publisher: CRC Press
ISBN: 1315342669
Category : Technology & Engineering
Languages : en
Pages : 4087
Get Book Here
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: Miha Tomazevic
Publisher: World Scientific
ISBN: 1783262524
Category : Technology & Engineering
Languages : en
Pages : 281
Get Book Here
Book Description
In the last few decades, a considerable amount of experimental and analytical research on the seismic behaviour of masonry walls and buildings has been carried out. The investigations resulted in the development of methods for seismic analysis and design, as well as new technologies and construction systems. After many centuries of traditional use and decades of allowable stress design, clear concepts for limit state verification of masonry buildings under earthquake loading have recently been introduced in codes of practice.Although this book is not a review of the state-of-the-art of masonry structures in earthquake zones, an attempt has been made to balance the discussion on recent code requirements, state-of-the-art methods of earthquake-resistant design and the author's research work, in order to render the book useful for a broader application in design practice. An attempt has also been made to present, in a condensed but easy to understand way, all the information needed for earthquake-resistant design of masonry buildings constructed using traditional systems. The basic concepts of limit state verification are presented and equations for seismic resistance verification of masonry walls of all types of construction, (unreinforced, confined and reinforced) as well as masonry-infilled reinforced concrete frames, are addressed. A method for seismic resistance verification, compatible with recent code requirements, is also discussed. In all cases, experimental results are used to explain the proposed methods and equations.An important part of this book is dedicated to the discussion of the problems of repair, retrofit and rehabilitation of existing masonry buildings, including historical structures in urban centres. Methods of strengthening masonry walls as well as improving the structural integrity of existing buildings are described in detail. Wherever possible, experimental evidence regarding the effectiveness of the proposed strengthening methods is given.
Author: Mohammad Jawaid
Publisher: Woodhead Publishing
ISBN: 0081023014
Category : Technology & Engineering
Languages : en
Pages : 276
Get Book Here
Book Description
Failure Analysis in Biocomposites, Fibre-Reinforced Composites and Hybrid Composites covers key aspects of fracture and failure in natural/synthetic fiber reinforced polymer based composite materials, ranging from crack propagation, to crack growth, and from notch-size effect, to damage-tolerant design. The book describes a broad range of techniques and strategies for the compositional and failure analysis of polymeric materials and products. It also illustrates the application of analytical methods for solving commonly encountered problems. Topics of interest include failure analysis, mechanical and physical properties, structural health monitoring, durability and life prediction, modelling of damage processes of natural fiber, synthetic fibers, and more. Written by leading experts in the field, and covering composite materials developed from different natural fibers and their hybridization with synthetic fibers, the book's chapters provide cutting-edge, up-to-date research on the characterization, analysis and modelling of composite materials. Contains contributions from leading experts in the field Discusses recent progress on failure analysis, SHM, durability, life prediction and the modelling of damage in natural fiber-based composite materials Covers experimental, analytical and numerical analysis Provides detailed and comprehensive information on mechanical properties, testing methods and modelling techniques
Author: Paulo José Brandão Barbosa Lourenço
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 228
Get Book Here
Book Description
Author: S. G. Fattal
Publisher:
ISBN:
Category : Masonry
Languages : en
Pages : 72
Get Book Here
Book Description
Author: Bahman Ghiassi
Publisher: Woodhead Publishing
ISBN: 0081024401
Category : Architecture
Languages : en
Pages : 890
Get Book Here
Book Description
Numerical Modeling of Masonry and Historical Structures: From Theory to Application provides detailed information on the theoretical background and practical guidelines for numerical modeling of unreinforced and reinforced (strengthened) masonry and historical structures. The book consists of four main sections, covering seismic vulnerability analysis of masonry and historical structures, numerical modeling of unreinforced masonry, numerical modeling of FRP-strengthened masonry, and numerical modeling of TRM-strengthened masonry. Each section reflects the theoretical background and current state-of-the art, providing practical guidelines for simulations and the use of input parameters. Covers important issues relating to advanced methodologies for the seismic vulnerability assessment of masonry and historical structures Focuses on modeling techniques used for the nonlinear analysis of unreinforced masonry and strengthened masonry structures Follows a theory to practice approach
Author: Stefano Della Torre
Publisher: Springer Nature
ISBN: 3030336875
Category : Building
Languages : en
Pages : 326
Get Book Here
Book Description
This open access book presents theoretical and practical research relating to the vast, publicly financed program for the construction of new schools and the reorganization of existing educational buildings in Italy. This transformative process aims to give old buildings a fresh identity, to ensure that facilities are compliant with the new educational and teaching models, and to improve both energy efficiency and structural safety with respect to seismic activity. The book is divided into three sections, the first of which focuses on the social role of the school as a civic building that can serve the needs of the community. Innovations in both design and construction processes are then analyzed, paying special attention to the Building Information Modeling (BIM) strategy as a tool for the integration of different disciplines. The final section is devoted to the built heritage and tools, technologies, and approaches for the upgrading of existing buildings so that they meet the new regulations on building performance. The book will be of interest to all who wish to learn about the latest insights into the challenges posed by, and the opportunities afforded by, a comprehensive school building and renovation program.
Author: J. M. P. Q. Delgado
Publisher: Springer
ISBN: 3030032701
Category : Technology & Engineering
Languages : en
Pages : 78
Get Book Here
Book Description
This book discusses the main mechanical features of masonry buildings and the peculiarities that affect their structural behaviour. It also examines technical information regarding accidents that have occurred in recent years in the Metropolitan Region of Recife, along with the historical records of these events, followed by indications of the causes for the collapse. The book offers extensive experimental results that make it possible to identify the contribution of several mortar rendering layers to the load capacity of the tested specimens. Lastly, it explores the factors that influenced the load capacity of the tested specimens.
Author: Hyunchul Jung
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Unreinforced masonry (URM) walls are commonly found in existing and heritage buildings in Canada, either as infill or load-bearing walls. Such walls are vulnerable to sudden and brittle failure under blast loads due to their insufficient out-of-plane strength. The failure of such walls under blast pressures can also result in fragmentation and wall debris which can injure building occupants. Over the years, researchers have conducted experimental tests to evaluate the structural behaviour of unreinforced masonry walls under out-of-plane loading. Various strengthening methods have been proposed, including the use of concrete overlays, polyurea coatings and advanced fiber-reinforced polymer (FRP) composites. Fabric-reinforced cementitious matrix (FRCM) is an emerging material which can also be used to strengthen and remove the deficiencies in unreinforced masonry walls. This composite material consists of a sequence of one or multiple layers of cement-based mortar reinforced with an open mesh of dry fibers (fabric). This thesis presents an experimental and analytical study which investigates the effectiveness of using FRCM composites to improve the out-of-plane resistance of URM walls when subjected to blast loading. As part of the experimental program, two large-scale URM masonry walls were constructed and strengthened with the 3-plies of unidirectional carbon FRCM retrofit. The specimens included one infill concrete masonry (CMU) wall, and one load-bearing stone wall. The University of Ottawa Shock Tube was used to test the walls under gradually increasing blast pressures until failure, and the results were compared to those of control (un-retrofitted) walls tested in previous research. Overall, the FRCM strengthening method was found to be a promising retrofit technique to increase the blast resistance of unreinforced masonry walls. In particular, the retrofit was effective in increasing the out-of-plane strength, stiffness and ultimate blast capacity of the walls, while delaying brittle failure and reducing fragmentation. As part of the analytical research, Single Degree of Freedom (SDOF) analysis was performed to predict the blast behaviour of the stone load-bearing retrofit wall. This was done by computing wall flexural strength using Plane Section Analysis, and developing an idealized resistance curve for use in the SDOF analysis. Overall, the dynamic analysis results were found to be in reasonable agreement with the experimental maximum displacements.
