Retrofitting design of building structures crc press book. Investors, city planners, and owners of buildings in geographic regions subject to seismic hazards are faced with the decision of whether or not to retrofit existing structures in order to lower their potential losses due to seismic events. As one of the most famous buildings in the world, the empire state building esb is well known, and so is its deep retrofit, one of the first in the world on a commercial building. An overview of the general retrofitting process is also given. Seismic retrofit of softfirststory structures using rotational friction dampers mohammad mahdi javidan1 and jinkoo kim2 abstract. Generally, the structural retrofit of concentrically braced frames improved the seismic resistance of the building and it can be considered in the retrofit of moment frame structures to prevent the risk of structural collapse under the design load with much more confidence. The experimental and analytical studies demonstrated that the introduction of a pmcinfill wall panel in a steel frame produced significant. In recent years, there is a significant improvement of retrofitting techniques. Njta design manual structures design 2 1 january 2019 section 2 structures design 2. Planning and engineering guidelines for the seismic. Hydrotite, a strip applied hydrophilic waterstop, should be considered for applications. Porches and other structures such as entry way canopies and carports that are attached to houses can break loose and tear away from the home. It aims to strengthen a structure to satisfy the requirements of the current codes for seismic design.
The seismic fragility of a given structure as well as the seismic hazard at a specific. This paper presents a methodology that can be used to make informed decisions on whether or not to retrofit structures for seismic events based on the expected economic benefit due to retrofitting. Unreinforced masonry buildings and earthquakes 1 1 introduction this document provides guidance on how to develop programs to reduce the earthquake risks of existing unreinforced masonry buildings. Because there are many earthquakes in japan, buildings must not only be able to be simply repaired, but also be strengthened. Conclusion seismic retrofitting techniques for concrete structures.
Reinhorn1, stefania viti2 and gianpaolo cimellaro3 1 professor, university at buffalo, buffalo, ny, 14260, usa. Index seismic retrofitting manual for highway structures. Note that seismic retrofit solutions can be, in many instances, applicable with. Guidelines for repair and retrofit of earthquake da maged rcc structures steps of retrofitting. When this happens, a part of the house roof is usually damaged leaving openings where water and wind can enter your home and the debris from the structure can cause serious damage to your house and those of your neighbors. The presentation is illustrated by case studies of actual buildings where traditional and innovative retrofitting methods have been applied. Seismic assessment and retrofit of unreinforced masonry urm structures is a relevant topic nowadays, especially in countries where the majority of the buildings were built before the. The standard drawings, the official approved drawings specially prepared for the project, profiles, crosssections, and any supplemental drawings, or. Concrete overlaying method manual among the individual methodology. Composite construction involving relatively new material system is used at pier of jetty i pt. Therefore, retrofit and rehabilitation of similar existing structures is needed in order to improve their seismic performance. Joints with movement potential can be addressed with one of greenstreaks pvc retrofit systems. Construction and retrofit methods of stone masonry structures. Column jacketing column retrofitting is often critical to the seismic performance of a structure.
Petrokimia gresik, where damages occur due to tides, corrosive environments, and the addition of the load on the pier that cause cracks. Advanced design examples of seismic retrofit of structures. They should be models in providing examples of quality education and the. Superior has pioneered the use of shotcrete as a cost saving and time saving alternative to cip cast in place concrete for the reinforcement of existing commercial and civil structures. An engineering consulting firm retained by the authority to perform engineering and plan preparation work.
Seismic retrofitting is a suitable technology for protection of a variety of structures. The design technologies and building materials and methods that went into the original construction of these buildings are often drastically different from their. At this scope, the critical role of residual or permanent deformations offset of the structure after the. Retrofitting will take relatively less construction cost with the same structural. Determine as accurate as possible how the building behave when shaken by an earthquake check the building check building material quality list all component of the building that are damaged 1. In this research a seismic retrofit system consisting of a pinjointed steel frame and rotational friction dampers is developed. A new procedure to retrofit existing structures subjected to seismic excitation is proposed. The getty seismic adobe project and its reports manifest the gcis commitment to identify and evaluate seismic retrofitting methodologies that balance safety with the conservation of our cultural heritage. The main features of this procedure are to reduce maximum acceleration and associated forces in. Some of these methods were practically implemented and.
Retrofitting of building structures, including maintenance, rehabilitation, and strengthening, is not only an important issue in urban construction and management, but also a frequent problem to structural engineers in property management disciplines. Retrofitting design of building structures crc press book retrofitting of building structures, including maintenance, rehabilitation, and strengthening, is not only an important issue in urban construction and management, but also a frequent problem to structural engineers in property management disciplines. The stateoftheart yasser korany 1, robert drysdale 2, samir chidiac3 abstract the vulnerability of unreinforced masonry buildings to impaired performance is a serious. Advanced performancebased seismic retrofit approaches should thus be defined and implemented, following current trends in seismic engineering for the seismic design of new structures. Njta design manual structures design 2 2 january 2019 consultant. Aisc rehabilitation and retrofit guide a reference for historic shapes and specifications cover d815. Seismic retrofit of historic building structures 1 and arash altoontash, ph.
Engineering principles and practices for retrofitting floodprone residential structures. To this end, the overarching objective of gsap was to find technologi. Seismic retrofit of structures using steel honeycomb dampers. While not yet completed in all tenant space, it already is clear that the retrofit will save more energy than the 41 percent modeled and command far higher rents. Structural retrofit seismic retrofit and historical restoration projects are ideally suited for the use of shotcrete. Also, changes in service conditions, often made arbitrarily, may lead to substantial changes in the structural behaviour resulting in a degradation of the.
Retrofitting upgrading of certain building systems existing structures to make them more resistant to seismic activity earthquake resistance structures can be earthquake damaged earthquake vulnerable retrofitting proves to be a better economic consideration and immediate shelter to problems rather than replacement of building. One example is retrofitting a 3way valve into a 2way valve, which results in closing one of the three openings to continue using the valve for certain industrial systems. An important disadvantage of the method, however, is that it cannot be applied partially to structures, unlike most other seismic retrofitting methods. Typical values of the structure factor q may fall in the range 1 to 5 for reinforced concrete structures cen, 1998. In the first chapter, dealing with existing structures, the topics of seismic safety of existing structures, the reason for examination, and the riskrelated basis of decisions for a retrofit according to prestandard sia 2018 examination of existing buildings with regards to earthquakes are explained.
International journal of steel structures, 171, 215229, 2017 foam for seismic retrofit of structures. Introduction although much efforts has been invested in recent years in the u. Pdf retrofit of concrete in pier structures nasrul fuad. Reinhorn1, stefania viti2 and gianpaolo cimellaro3 1 professor, university at buffalo, buffalo, ny, 14260, usa 2 assistant professor, university of florence, italy 3 graduate student, university at buffalo, buffalo, ny, 14260, usa abstract. Pdf seismic retrofitting techniques for concrete structures. It has matured in the recent years to a highly reliable technology. Pdf predisaster preparedness strategies lead to repairretrofitting of reinforced concrete structures for ensuring satisfactory performance. Natural stone is a durable construction material which has been used through centuries for various types of structures.
Steel design guide series15 aisc rehabilitation and retrofit guide a reference for historic shapes and specifications roger l. Construction and retrofit methods of stone masonry. Manual on retrofitting of existing vulnerable school buildingsassessment to retrofitting part i i preface schools are institutions providing an education as well as a common place for community gatherings and meetings. This chapter presents the factors that influence retrofitting decisions and the intimate role they play in. But, the expertise needed is not available in the basic level. Every effort is required to support households to repair and retrofit unsafe structure so that they can receive the grant amount. Strength reduction with damping enhancement by andrei m. Retrofitting reduces the vulnerability of damage of an existing structure during a future earthquake. Ohio able professional development network 322014 spring 2014 teacher academy 1 retrofitting session goal retrofit unit of lesson plans. A performancebased approach to retrofitting unreinforced masonry structures for seismic loads by keith bouchard submitted to the department of civil and environmental engineering on may 14, 2007 in partial fulfillment of the requirements for the degree of master of engineering in civil and environmental engineering abstract. Earthquake creates great devastation in terms of life, money and failures of structures. This chapter gives a basic overview of the different flood retrofit options. Seismic retrofitting techniques for concrete structures.
Advanced design examples of seismic retrofit of structures mohammad yekrangnia on. A performancebased approach to retrofitting unreinforced. The authors present various international case studies of seismic retrofitting projects and the different possible strategies on how to handle complex problems encountered. Retrofitting is an important process used for valves and actuators to ensure optimal operation of an industrial plant. Performance based earthquake engineering, whether used for risk assessment and retrofit of existing buildings or design of new ones, is beginning to provide a.
Assessment and retrofit of masonry structures 165 figure 4. Reinhorn1, stefania viti2 and gianpaolo cimellaro3 1 professor, university at buffalo, buffalo, ny, 14260, usa 2 assistant professor, university of florence, italy 3 graduate student. Pdf retrofitting is a process that is used to improve the strength, durability and performance of the structure. Introduction although much efforts has been invested in recent years in. Planning and engineering guidelines for the seismic retrofitting. Structural retrofitting of existing buildings is an eligible activity under the hmgp and pdm that involves modifications to the structural elements of a building to reduce or eliminate the risk of future damage and to protect inhabitants.
The memberlevel retrofit approaches include the addition of concrete, steel, or fiber reinforced polymer frp jackets for use in confining rc columns and joints. The third and main chapter of the publication consists of a collection of examples of. Bonded repair and retrofit of concrete structures using frp composites recommended construction specifications and process control manual. As the following chapters will show, this building type is typically the most seismically. Read bonded repair and retrofit of concrete structures. This study highlights the principals of assessing and retrofitting of structures against seismic events. The main focus of the book is structural stabilization, strengthening, and retrofit with maintenance and serviceability items such as water penetration. The experimental and analytical studies demonstrated that the introduction of a pmcinfill wall panel in a steel frame produced significant enhancements to stiffness, strength, and energy dissipation capacity.
Dec 17, 20 as one of the most famous buildings in the world, the empire state building esb is well known, and so is its deep retrofit, one of the first in the world on a commercial building. Seismic isolation is proven to be a very effective method for protecting buildings and other structures against seismic hazards. Jan 29, 20 retrofitting upgrading of certain building systems existing structures to make them more resistant to seismic activity earthquake resistance structures can be earthquake damaged earthquake vulnerable retrofitting proves to be a better economic consideration and immediate shelter to problems rather than replacement of building. Seminar on seismic design and retrofit of bridges likely to transfer and concentrate damage in other elements that had not been retrofit, these earlier studies did not address any of the important issues related to the seismic resistance of the viaducts in the longitudinal direction. Seminar on seismic design and retrofit of bridges deck and the new edge girder. The authors present various international case studies of seismic retrofitting projects and the. Construction characteristics of masonry structures, typical material properties, and analytical approaches are included for historic, transitional, and modern masonry construction typologies. Decision analysis for seismic retrofit of structures. Because structures built prior to 1976 were not adequately designed for seismic effects. Pdf retrofit of concrete in pier structures nasrul. Construction of the integral edge girder where the columns are located away from the edge of the roadway i. These structures are exposed to corrosive and degradation factors such as climate change and pollution, natural ageing, earthquake actions, increasing urbanization and even human negligence, potentially exposing them to irreversible structural damage and loss. Retrofitting is any change made to an existing structure to reduce or.
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