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Seismic Assessment Of Unreinforced Masonry Structures
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Book Synopsis Seismic Assessment of Unreinforced Masonry Buildings in Boston's Back Bay Neighborhood by : Emily Deen Spencer
Download or read book Seismic Assessment of Unreinforced Masonry Buildings in Boston's Back Bay Neighborhood written by Emily Deen Spencer and published by . This book was released on 2015 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a seismic evaluation of the unreinforced masonry buildings in Boston Massachusetts's historical Back Bay neighborhood. This Boston district, famous for its rows of Victorian brownstone residences is considered to be one of the best preserved examples of 19 'h century urban design. There are a few specific reasons to speculate at the vulnerability of this neighborhood to seismic events. First, in 1755, one hundred years before the Back Bay started to be built, the most massive earthquake of New England's history occurred, damaging unreinforced masonry structures in Boston. Approximately eighty percent of the Back Bay neighborhood is now made up of unreinforced masonry structures. Second, seismic design was not required in Boston until 1975, which means a staggering majority of the buildings in the Back Bay were constructed without any kind of anti-seismic lateral system. The aim of this thesis is to assess the structural response of the unreinforced masonry homes of the Back Bay to seismic activity due to these issues. A case study of an unreinforced masonry building in the neighborhood is assessed through structural analysis of its facade and party walls. The performance of this building is extrapolated to represent the state of the unreinforced masonry buildings of the Back Bay.
Book Synopsis Seismic Assessment of Unreinforced Masonry Structures by : Nathan Daniel Boutin
Download or read book Seismic Assessment of Unreinforced Masonry Structures written by Nathan Daniel Boutin and published by . This book was released on 2009 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructure in the United States is comprised of numerous structures that are decades old. The Longfellow Bridge is one of the oldest pieces of this infrastructure that is still in use and has become one of the most historic structures of the Boston area. Currently, the steel superstructure of the bridge is in poor condition while the masonry piers and abutments remain in good condition. In the near future, a major replacement of the superstructure will be required. In order for the masonry elements to be approved for a renewed design life, they must be assessed for their ability to withstand seismic loads. This assessment presents an investigation of original construction documents and identifies critical components of the bridge that require more in depth analysis. It also shows a qualitative review of expected seismic activity for the region surrounding Boston. A review of current theory related to unreinforced masonry structures is introduced and analysis is then performed on critical wall sections. Specific ground motions are applied using both constant acceleration and impulse loadings to the structure. The results of the analyses reveal a need for further investigation into retrofitting schemes as there is not a sufficient factor of safety that exists with certain pier elements. Furthermore, a failure envelope is developed and presented for several types of impulse loads in order to serve as a basis for understanding the behavioral response to potential earthquake loading.
Download or read book Section 10 written by Jitendra Bothara and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Seismic Risk Analysis and Management of Civil Infrastructure Systems by : S Tesfamariam
Download or read book Handbook of Seismic Risk Analysis and Management of Civil Infrastructure Systems written by S Tesfamariam and published by Elsevier. This book was released on 2013-04-30 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquakes represent a major risk to buildings, bridges and other civil infrastructure systems, causing catastrophic loss to modern society. Handbook of seismic risk analysis and management of civil infrastructure systems reviews the state of the art in the seismic risk analysis and management of civil infrastructure systems.Part one reviews research in the quantification of uncertainties in ground motion and seismic hazard assessment. Part twi discusses methodologies in seismic risk analysis and management, whilst parts three and four cover the application of seismic risk assessment to buildings, bridges, pipelines and other civil infrastructure systems. Part five also discusses methods for quantifying dependency between different infrastructure systems. The final part of the book considers ways of assessing financial and other losses from earthquake damage as well as setting insurance rates.Handbook of seismic risk analysis and management of civil infrastructure systems is an invaluable guide for professionals requiring understanding of the impact of earthquakes on buildings and lifelines, and the seismic risk assessment and management of buildings, bridges and transportation. It also provides a comprehensive overview of seismic risk analysis for researchers and engineers within these fields. - This important handbook reviews the wealth of recent research in the area of seismic hazard analysis in modern earthquake design code provisions and practices - Examines research into the analysis of ground motion and seismic hazard assessment, seismic risk hazard methodologies - Addresses the assessment of seismic risks to buildings, bridges, water supply systems and other aspects of civil infrastructure
Book Synopsis Assessment and Improvement of the Structural Performance of Buildings in Earthquakes by :
Download or read book Assessment and Improvement of the Structural Performance of Buildings in Earthquakes written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Analysis of Multi-Story Unreinforced Masonry Buildings with Flexible Diaphragms by : Juan Aleman Hernandez
Download or read book Seismic Analysis of Multi-Story Unreinforced Masonry Buildings with Flexible Diaphragms written by Juan Aleman Hernandez and published by . This book was released on 2014 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies regarding the regional seismicity of New York City (NYC) indicate that earthquakes of magnitude greater than or equal to 5 have a 20-40% probability of occurring in a 50 year period. Considering that more than 50% of the large population of the region (19.1 million) is living in an area where 80% of the buildings are of old Unreinforced Masonry (URM) construction, it is likely that even a moderate earthquake could have critical consequences on public safety and the economy of this area. The main goal of this study was to develop simulation capabilities supported by experimental testing to evaluate the seismic performance of typical unreinforced masonry buildings with flexible diaphragms located in NYC. Simplified nonlinear macro-models of wood diaphragms, masonry walls and floor-to-wall connections were developed and validated individually using data from past experiments. The models are implemented in both commercial and research software to demonstrate their practical use. In particular, a new approach for modeling flexible diaphragms is proposed that is shown to provide similar accuracy to detailed finite element models at a fraction of the computation cost. The models developed were also validated as at the system level, through shake table testing of two full-scale specimens conducted as part of this study. The specimens were designed and constructed to represent the expected loading conditions of a central portion of a one-story URM building and constructed of materials representative of older masonry construction. The tests provide a unique data set that captures the interaction between flexible floors, out-of-plane walls and their connections at, full scale.The validated macro-models can be used for performance-based seismic assessment of unreinforced masonry building in NYC and elsewhere. To demonstrate their use, preliminary studies were conducted to develop out-of-plane URM fragility curves, a building-specific collapse fragility function, and estimate the seismic response of the building when subjected to a ground shaking intensity similar to the 2011 Virginia Earthquake. The probabilistic framework and new performance definitions provided by the FEMA P58 project were used to conduct a performance-based seismic assessment for an archetype unreinforced masonry building in New York City with an emphasis on out-of-plane behavior. This preliminary study served to demonstrate the applicability of the proposed models for applications in performance-based design.
Book Synopsis Seismic Assessment of Unreinforced Masonry Buildings In Canada by : Gilbert Bélec
Download or read book Seismic Assessment of Unreinforced Masonry Buildings In Canada written by Gilbert Bélec and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Risk Assessment of Unreinforced Masonry Buildings Using Fuzzy Based Techniques for the Regional Seismic Risk Assessment of Ottawa, Ontario by : Amid El Sabbagh
Download or read book Seismic Risk Assessment of Unreinforced Masonry Buildings Using Fuzzy Based Techniques for the Regional Seismic Risk Assessment of Ottawa, Ontario written by Amid El Sabbagh and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unreinforced masonry construction is considered to be the most vulnerable forms of construction as demonstrated through recent earthquakes. In Canada, many densely populated cities such as (Vancouver, Montreal and Ottawa) have large inventories of seismically vulnerable masonry structures. Although measures have been taken to rehabilitate and increase the seismic resistance of important and historic structures, many existing unreinforced masonry structures have not been retrofitted and remain at risk in the event of a large magnitude earthquake. There is therefore a need to identify buildings at risk and develop tools for assessing the seismic vulnerability of existing unreinforced masonry structures in Canada. This thesis presents results from an ongoing research program which forms part of a multi-disciplinary effort between the University of Ottawa's Hazard Mitigation and Disaster Management Research Centre and the Geological Survey of Canada (NRCAN) to assess the seismic vulnerability of buildings in dense urban areas such as Ottawa, Ontario. A risk-based seismic assessment tool (CanRisk) has been developed to assess the seismic vulnerability of existing unreinforced masonry and reinforced concrete structures. The seismic risk assessment tool exploits the use of fuzzy logic, a soft computing technique, to capture the vagueness and uncertainty within the evaluation of the performance of a given building. In order to conduct seismic risk assessments, a general building inventory and its spatial distribution and variability is required for earthquake loss estimations. The Urban Rapid Assessment Tool (Urban RAT) is designed for the rapid collection of building data in urban centres. This Geographic Information System (GIS) based assessment tool allows for intense data collection and revolutionizes the traditional sidewalk survey approach for collecting building data. The application of CanRisk and the Urban RAT tool to the City of Ottawa is discussed in the following thesis. Data collection of over 13,000 buildings has been obtained including the seismic risk assessment of 1,465 unreinforced masonry buildings. A case study of selected URM buildings located in the City of Ottawa was conducted using CanRisk. Data obtained from the 2011 Christchurch Earthquake in New Zealand was utilized for verification of the tool.
Book Synopsis Seismic Assessment of Unreinforced Masonry Buildings by Means of Non-linear Static Procedures and Incremental Dynamic Analysis by : Jorge Arturo Avila Haro
Download or read book Seismic Assessment of Unreinforced Masonry Buildings by Means of Non-linear Static Procedures and Incremental Dynamic Analysis written by Jorge Arturo Avila Haro and published by . This book was released on 2015 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Assessment and Retrofit of Unreinforced Masonry Buildings Using Fibre Reinforced Polymer Materials by : Hamid Mahmood
Download or read book Seismic Assessment and Retrofit of Unreinforced Masonry Buildings Using Fibre Reinforced Polymer Materials written by Hamid Mahmood and published by . This book was released on 2012 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research in this thesis was conducted with the primary aims of seismically assessing the current stock of Pakistan unreinforced masonry (URM) buildings and investigating seismic retrofit of New Zealand URM buildings using fibre reinforced polymer (FRP) materials. Seismic assessment of Pakistan URM buildings was conducted by adopting three international rapid evaluation methods for Pakistan conditions. Assessment case studies of major cities of Pakistan were performed and it was concluded that the New Zealand method is applicable with certain modifications to Pakistan URM buildings. The focus of the second part of this research was on seismic retrofit of in-plane loaded walls, that are likely to fail in a shear mode, as such failures are commonly observed in earthquakes. FRP materials have become popular in recent years, but limited test data, and design guidelines exist for their use on URM walls. The experimental part of this included seventeen monotonic diagonal compression tests, six reverse cyclic diagonal compression tests, and six horizontal shear tests on unretrofitted and FRP-retrofitted walls. The research showed that FRP is highly effective in increasing shear strength, pseudo-ductility and toughness, which are important parameters in seismic design. Horizontal shear tests on flanged walls, with realistic boundary conditions, confirmed the effectiveness of FRP for enhancement of shear strength of URM. Simple finite element (FE) models were presented in this research using a commercial FE software. The models were effective in simulating the behaviour and shear stress of wallettes retrofitted with full surface fabrics and strips that were oriented along the wallette diagonals. A guide for the design of in-plane loaded walls that are retrofitted with externally bonded FRP materials was presented. Design expressions were developed from the basic principle and were correlated to the experimental results. Design examples were also included.
Book Synopsis Characterisation and Seismic Assessment of Unreinforced Masonry Buildings by : Alistair Peter Russell
Download or read book Characterisation and Seismic Assessment of Unreinforced Masonry Buildings written by Alistair Peter Russell and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Reinforced Concrete Buildings for Seismic Performance by : Mark Aschheim
Download or read book Design of Reinforced Concrete Buildings for Seismic Performance written by Mark Aschheim and published by CRC Press. This book was released on 2019-04-05 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The costs of inadequate earthquake engineering are huge, especially for reinforced concrete buildings. This book presents the principles of earthquake-resistant structural engineering, and uses the latest tools and techniques to give practical design guidance to address single or multiple seismic performance levels. It presents an elegant, simple and theoretically coherent design framework. Required strength is determined on the basis of an estimated yield displacement and desired limits of system ductility and drift demands. A simple deterministic approach is presented along with its elaboration into a probabilistic treatment that allows for design to limit annual probabilities of failure. The design method allows the seismic force resisting system to be designed on the basis of elastic analysis results, while nonlinear analysis is used for performance verification. Detailing requirements of ACI 318 and Eurocode 8 are presented. Students will benefit from the coverage of seismology, structural dynamics, reinforced concrete, and capacity design approaches, which allows the book to be used as a foundation text in earthquake engineering.
Book Synopsis Earthquake-resistant Design Of Masonry Buildings by : Miha Tomazevic
Download or read book Earthquake-resistant Design Of Masonry Buildings written by Miha Tomazevic and published by World Scientific. This book was released on 1999-07-05 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Seismic Analysis and Assessment of Historic Unreinforced Masonry Structures by : Ryan Manuel Valadao
Download or read book Seismic Analysis and Assessment of Historic Unreinforced Masonry Structures written by Ryan Manuel Valadao and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is targeted towards understanding the behaviour of unreinforced masonry structures (URM) under lateral loads that simulate earthquake effects, as well what aspects of their composition affects their behaviour. Masonry is a composite material containing bricks and mortar. In assessment of existing masonry construction uncertainties prevail regarding the homogenized material mechanical properties, which affect the estimated demands on structural masonry components and their corresponding resistances. To understand these effects, a series of nonlinear finite element parametric studies were conducted studying critical factors involved in the makeup of masonry. In addition, studies were conducted on the effectiveness of empirical equations in estimating the mechanical properties of masonry. The final aspect was three-dimensional finite element modelling of a scale URM structure that had been tested on a shake table. The findings of this study are crucial in determining the vulnerability of URM structures which include heritage construction to seismic hazards.
Book Synopsis Prestandard and Commentary for the Seismic Rehabilitation of Buildings by : Federal Emergency Management Agency
Download or read book Prestandard and Commentary for the Seismic Rehabilitation of Buildings written by Federal Emergency Management Agency and published by CreateSpace. This book was released on 2013-04-03 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: The title of this document, FEMA 356 Prestandard and Commentary for the Seismic Rehabilitation of Buildings, incorporates a word that not all users may be familiar with. That word—prestandard—has a special meaning within the ASCE Standards Program in that it signifies the document has been accepted for use as the start of the formal standard development process, however, the document has yet to be fully processed as a voluntary consensus standard. The preparation of this prestandard was originally undertaken with two principal and complementary objectives. The first was to encourage the wider application of the NEHRP Guidelines for the Seismic Rehabilitation of Buildings, FEMA 273, by converting it into mandatory language. Design professionals and building officials thus would have at their disposal a more specific reference document for making buildings more resistant to earthquakes. This volume fully meets this first objective. The second objective was to provide a basis for a nationally recognized, ANSI-approved standard that would further help in disseminating and incorporating the approaches and technology of the prestandard into the mainstream of design and construction practices in the United States. How successfully this volume achieves the second objective will become apparent with the passage of time, as this prestandard goes through the balloting process of the American Society of Civil Engineers. Several additional related efforts were ongoing during the development of this prestandard. A concerted effort was made to gather any new information produced by these endeavors. Topics varied considerably, but typically covered approaches, methodologies, and criteria. Whenever an analysis of the new information disclosed significant advances or improvements in the state-of-the-practice, they were included in this volume. Thus, maintaining FEMA 273 as a living document—a process to which FEMA is strongly committed—is continuing.
Book Synopsis Reducing the Seismic Vulnerability of Existing Buildings Assessment and Retrofit by : Tiago Miguel Ferreira
Download or read book Reducing the Seismic Vulnerability of Existing Buildings Assessment and Retrofit written by Tiago Miguel Ferreira and published by MDPI. This book was released on 2019-07-31 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue Reducing the Seismic Vulnerability of Existing Buildings: Assessment and Retrofit that was published in Buildings
Book Synopsis The ShakeOut Scenario Supplemental Study: Unreinforced Masonry (URM) Buildings by :
Download or read book The ShakeOut Scenario Supplemental Study: Unreinforced Masonry (URM) Buildings written by and published by SPA Risk LLC. This book was released on with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
