Strengthening Techniques for the Seismic Retrofit of Urm Buildings PDF Download
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Author: Najif Ismail
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659155611
Category : Building, Brick
Languages : en
Pages : 304
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Book Description
Seismic retrofitting of unreinforced masonry (URM) buildings is not a new concept and many techniques have already been used around the world for such improvements in their earthquake performance but limited technical literature is available on their seismic performance. This motivated the research study reported herein, which is one of only a few studies where full scale cyclic testing of strengthened URM walls was performed, and where the test walls were constructed using real or close replication of prevalent historic URM materials. Provided also is a comprehensive review of existing strengthening techniques, with a brief account on associated design concepts, implementation procedures and heritage conservation considerations. Additionally, a set of guidelines are also provided along with worked examples to facilitate a well-conceived seismic retrofit design.
Author: Najif Ismail
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659155611
Category : Building, Brick
Languages : en
Pages : 304
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Book Description
Seismic retrofitting of unreinforced masonry (URM) buildings is not a new concept and many techniques have already been used around the world for such improvements in their earthquake performance but limited technical literature is available on their seismic performance. This motivated the research study reported herein, which is one of only a few studies where full scale cyclic testing of strengthened URM walls was performed, and where the test walls were constructed using real or close replication of prevalent historic URM materials. Provided also is a comprehensive review of existing strengthening techniques, with a brief account on associated design concepts, implementation procedures and heritage conservation considerations. Additionally, a set of guidelines are also provided along with worked examples to facilitate a well-conceived seismic retrofit design.
Author: Najif Ismail
Publisher:
ISBN:
Category : Historic buildings
Languages : en
Pages : 273
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Book Description
Approximately two thirds of the fatalities caused by earthquakes in the last one hundred years have resulted due to the collapse of unreinforced masonry (URM) buildings. Poor performance of URM buildings was also observed in recent earthquakes such as the 2005 Pakistan earthquake, the 2008 Sichuan earthquake, the 2009 L'Aquila earthquake and the 2010/2011 Canterbury (New Zealand) earthquake sequence. The New Zealand URM building stock consists of mostly pre-1931 structures, with many of these buildings contributing to the country's architectural heritage. It was revealed in a recent survey that many of New Zealand's URM buildings have insufficient capacity to endure even a moderate earthquake but the concerns of heritage preservation makes demolition of these historic URM buildings undesirable, which results in seismic retrofit being necessary. Many seismic retrofit solutions have already been implemented in New Zealand, but the experimental database on their seismic behaviour is scarce. Consequently, the research reported here was undertaken to investigate the performance of URM walls when seismically retrofitted using three strengthening techniques, which were selected after an extensive literature review. The selected strengthening techniques are (i) unbonded posttensioning using threaded steel rods and sheathed greased strands, (ii) near surface mounting of high strength twisted stainless steel bars (NSM-TS), and (iii) surface application of polymer textile reinforced mortar (TRM). The selected seismic strengthening techniques were adapted for New Zealand URM buildings, and the performance of URM walls seismically strengthened using the adapted strengthening techniques was investigated by performing numerous full scale laboratory based and field tests. Based on the results of the experimental program empirical design equations were derived and checked for accuracy by comparing with current design equations and with experimental results. Finally, case studies were conducted to demonstrate application of these strengthening techniques for the seismic retrofit of historic URM buildings.
Author:
Publisher: FEMA
ISBN:
Category : Buildings
Languages : en
Pages : 572
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Book Description
Author:
Publisher:
ISBN: 9781642241815
Category :
Languages : en
Pages : 375
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Book Description
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. The planning of changes to existing buildings differs from new planning through an important condition; the existing construction must be taken as the basis of all planning and building actions. The need for seismic retrofitting of an existing building can arise due to several reasons like: building not designed to code, subsequent updating of code and design practice, subsequent upgrading of seismic zone, deterioration of strength and aging, modification of existing structure, change in use of the building, etc. Seismic retrofit is primarily applied to achieve public safety, with various levels of structure and material survivability determined by economic considerations. In recent years, an increased urgency has been felt to strengthen the deficient buildings, as part of active disaster mitigation, and to work out the modifications that may be made to an existing structure to improve the structural performance during an earthquake. Seismic retrofitting schemes can be either global or local, based on how many members of the structures they are used for. Global Retrofit methods include conventional methods (increase seismic resistance of existing structures) or non-conventional methods (reduction of seismic demand). Strengthening and Retrofitting of Existing Structures is a compendium of cutting-edge trends of the research and existing practices in strengthening and retrofitting of structural elements, as well as the findings of a research endeavor initiated by the authors to investigate and develop a robust structural retrofitting scheme by utilizing elastomeric polymers to enhance the resistance of reinforced concrete (RC) structures. It addresses in detail specific techniques for the strengthening of traditional constructions, reinforced concrete buildings, bridges and their foundations. It also presents insight into the key issues relevant to seismic retrofit of concrete frame buildings. Many guidelines are reviewed regarding seismic rehabilitation of school, office, hospital and apartment buildings.
Author: Noor Misnon
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This thesis describes the strategies for earthquake strengthening vintage clay bricks unreinforced masonry (URM) buildings. URM buildings are well known to be vulnerable to damage from earthquake-induced lateral forces that may result in partial or full building collapse. The 2010/2011 Canterbury earthquakes are the most recent destructive natural disaster that resulted in the deaths of 185 people. The earthquake events had drawn people's attention when URM failure and collapse caused about 39 of the fatality. Despite the poor performance of URM buildings during the 2010/2011 Canterbury earthquakes, a number of successful case study buildings were identified and their details research in-depth. In order to discover the successful seismic retrofitting techniques, two case studies of retrofitted historical buildings located in Christchurch, New Zealand i.e. Orion's URM substations and an iconic Heritage Hotel (aka Old Government Building) was conducted by investigating and evaluating the earthquake performance of the seismic retrofitting technique applied on the buildings prior to the 2010/2011 Canterbury earthquakes and their performance after the earthquakes sequence. The second part of the research reported in this thesis was directed with the primary aim of developing a cost-effective seismic retrofitting technique with minimal interference to the vintage clay-bricks URM buildings. Two retrofitting techniques, (i) near-surface mounted steel wire rope (NSM-SWR) with further investigation on URM wallettes to get deeper understanding the URM in-plane behaviour, and (ii) FRP anchor are reported in this research thesis.
Author:
Publisher:
ISBN:
Category : Juvenile Nonfiction
Languages : en
Pages : 74
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Book Description
This renamed version of the former Uniform code for building conservation guidelines for retrofitting unreinforced masonry bearing wall buildings, reinforced concrete and reinforced masonry buildings, wood frame residential buildings, and concrete with masonry infill buildings.
Author: Amarnath Chakrabarti
Publisher: Alpha Science International, Limited
ISBN:
Category : Science
Languages : en
Pages : 488
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Book Description
The Handbook on Seismic Retrofit of Buildings is a compiled source of technical information for engineers and professionals in the buildings industry, decision making officials and students. The Handbook is divided into 17 chapters, covering - basic concepts of earthquakes, seismic design and retrofit of buildings, seismic vulnerability assessment, retrofit strategies for different types of buildings, geotechnical and foundation aspects, advanced applications, quality assurance and case studies.
Author: Comité euro-international du béton
Publisher: Thomas Telford
ISBN: 0727725564
Category : Anchorage (Structural engineering)
Languages : en
Pages : 52
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Book Description
The economic consequences and loss of life make earthquake disasters catastrophic anywhere in the world. Seismic retrofitting, or repair, of buildings is an essential component for mitigating the effects of earthquakes. This state-of-the-art report reviews and introduces the latest design concepts and methods for seismic retrofitting throughout the world, with emphasis on the use of fastening systems.
Author: Antonio Aguilar (Architect)
Publisher: Government Printing Office
ISBN: 9780160932526
Category :
Languages : en
Pages : 20
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Book Description
This Preservation Brief provides information on how earthquakes affect historic buildings, how a historic preservation ethic can guide responsible retrofit decisions, and how various methods of seismic rehabilitation can protect human lives and historic structures. The Brief provides a description of the most common vulnerabilities of various building construction types and the seismic strengthening methods most often needed to remedy them. A glossary of technical terms is also provided at the end of the Brief. Undertaking the seismic rehabilitation of a historic building is a process that requires careful planning and execution, and the coordinated work of architects, engineers, code officials, contractors, and agency administrators. Project personnel working together can ensure that the architectural, structural, financial, programmatic, cultural, and social values of historic buildings are preserved, while rendering them safe for continued use.
Author:
Publisher: SPA Risk LLC
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
