Rehabilitation and retrofitting of structures rrs pdf. Applied mechanics department, sardar vallabhbhai national institute of technology, surat, india 395007. Retrofitting a building is often less expensive than to demolish and rebuild, or even to build new. Innovative materials for seismic and energy retrofitting. Research context and objectives works regarding retrofitting or structural stabilization of adobe this study is the first extensive analysis of all seismic and applies these works to historic buildings, also taking into retrofitting techniques available for historic adobe buildings. Retrofitting of damaged buildings is upgrading the seismic resistance of existing. The aim of seismic evaluation is to judge the seismic capacity and vulnerability of buildings during earthquake so that the amount of retrofitting may be.
Common causes of damage and failure of urm buildings as well as a stateoftheart of modern retrofitting techniques e. Upgrading of certain building systems existing structures to make them more resistant to seismic activity earthquake resistance is really of more importance. Besides seismic loads, urm buildings may require upgrading due to abnormal loads, environmental loads, or other causes of deterioration. Effects of retrofitting applications on reinforced. Radhikatai pandav college of engineering, nagpur 2 student at department of civil engineering, smt. The project includes the development of lowtech, costeffective seismic retrofitting techniques and recom. Advanced retrofitting techniques for reinforced concrete. Retrofitting existing buildings to improve sustainability and. The main goal during earthquakes is to assure that building collapse doesnt occur and the risk of death or injury to people is minimized and. The basic idea behind the strength enhancement of structure is based on the concept of improving the. For deep energy retrofit, however, a whole building retrofit approach is usually considered. In general, the thickness of the overlay ranges from 70mm to 150mm 23 d. The primary concern of a structural engineer is to successfully restore the structures as quickly as possible.
Several simulation tools are available for new building energy modelling and can be used for existing building. Building retrofit an overview sciencedirect topics. Selection of right materials, techniques and procedures to be employed for the repair of a given structures have been a major challenges. A study of seismic retrofitting techniques on existing.
Pdf seismic retrofitting techniques for historic adobe. Review on techniques, tools and best practices for energy. The outcomes of the project are in the form of three reports. Seismic rehabilitation methods for existing buildings. Study on methods and techniques of retrofitting ijert. The retrofit process is a general term that may consist of a variety of treatments, including. In the paper briefly prevailing retrofit methods without affecting their daily functioning. Retrofitting will involve relatively less resources, either human resources or natural resources.
Energy absorption bracing with lowyieldpoint steel. Structures can be a earthquake damaged, b earthquake vulnerable retrofitting proves to be a. Jan 01, 2017 therefore, green retrofitting of existing buildings should focus on economic, environmental and social advantages. Manual on retrofitting of existing vulnerable school buildings assessment to retrofitting part ii ii contents preface i contents ii list of figures iii introduction 1 principle of retrofitting 3 vulnerability assessment for a novice 5 vulnerability assessment for an engineer 7 vulnerability assessment for a program person 10 various techniques on retrofitting 11. Analysis, design and application of retrofitting techniques.
Upgrading of certain building systems existing structures to make them more resistant to seismic activity earthquake resistance is really of more. Pdf seismic rehabilitation methods for existing buildings. To have a better understanding of various retrofitting methods, there is a need for a thorough. Their some techniques used which are given below pushover approach before and after retrofitting. Retrofitting techniques for existing damaged buildings. A decision of retrofitting must consider whether the region provides such technology. The retrofitting is examined with an application to a 64m highrise src steel framed reinforced concrete building built in 1970. Conventional seismic retrofitting approaches such as adding shear walls or steelframed bracing have many problems, such as reduction in room serviceability caused by the closing of openings and loss of building use during retrofitting work. The project includes the development of lowtech, costeffective seismic retrofitting techniques.
A study of seismic retrofitting techniques on existing structures. Pdf evaluation of seismic retrofitting techniques used in old. Techniques of seismic retrofitting for concrete structures. Breakage with repair in many cases, some destructive procedures are required to access the structural component or to perform retrofit process. Statistics of damage and retrofitting techniques in reinforced concrete buildings affected by the 1985 earthquake. Suitable retrofitting techniques are suggested after proper analysis and documentation at different sites. For the collection of examples, buildings were selected to be as different and extensive as possible according to building use, structure type, ground type, seismic zone, and retrofit plan. The problems faced by a structural engineer in retrofitting earthquake damaged building a.
New zealand endured a devastating earthquake in february 2011 in christchurch that was registered as 6. Innovative materials for seismic and energy retrofitting of. Review of conventional and innovative technologies for. One way of retrofitting the beams is by concrete jacketing. Bulletin of the new zealand national society for earthquake engineering1981. Mathurkar 3, girish zade 4 1student at department of civil engineering, smt. Seismic retrofitting of reinforced concrete buildings using.
Retrofitting of masonry buildings submitted by manish sharma submitted to dr. Retrofitting will take relatively less construction cost with similar structural performance achievement. But you may be wondering at this point why retrofitting is necessary. Manual on retrofitting of existing vulnerable school buildings assessment to retrofitting part i 5 d availability of adequate technology some of retrofitting techniques need a modern technology to implement it. This paper presents a comprehensive overview of the techniques available for the seismic retrofitting of adobe buildings. Pdf assessment of damaged building by using retrofitting.
Finally, selection criteria for retrofitting technique are briefly discussed. Replace in cases structural components cannot be improved to meet retrofitting objectives or the. Retrofit methods for normal masonry buildings in algiers. This involves placing an additional layer of concrete around the existing beam, together with additional longitudinal bars and stirrups, to enhance the flexural andor shear capacities.
Pdf seismic retrofitting techniques for concrete structures. Retrofitting is making changes to an existing building to protect it from flooding or other hazards such as high winds and earthquakes. Consequently, the seismic retrofitting of old strategic buildings is a central issue in prevention and mitigation strategies. Fardis, effectiveness of seismic strengthening techniques for masonry buildings. It analyzes these techniques viability from a structural engineering. Techniques of seismic retrofitting for concrete structures core. Example 2 is a chapel in a university built in 1920. Includes use of energyefficient cooling systems as well as temperature and lighting controls.
The resilience of communities is given by the ideal convolution of the resilience of all their single parts. Enhancing the strength of existing building using retrofitting techniques rahul p. Challenges and opportunities of 3 heritage buildings in europe, and iii a bright future for heritage buildings. Advanced retrofitting techniques for reinforced concrete structures.
Abstract the objective of this research is to evaluate the effects of different retrofit applications on the global response of. Retrofitting of existing buildings september 2008 in chapter5 titled as retrofitting of engineered buildings, the rcc buildings, which have systemic and rational approach in their design and construction have been taken for discussing different techniques for retrofitting. Seismic retrofitting techniques for concrete structures. The retrofitting of existing buildings for seismic criteria. Huge capital is invested in construction, planning and maintaining the quality of a new building. Retrofitting often requires restricting the use of the building during retrofit. Architettura e design, politecnico di torino, italy filippi, roberto. Strengtheningretrofitting techniques on unreinforced masonry.
In conventional energy retrofit, usually simple and fast methods are used and different systems are considered separately zhai et al. Get free seismic rehabilitation methods for existing buildings textbook and unlimited access to our library by created an account. Research article materials and jacketing technique for. Isolation, retrofitting techniques, jacketing, earthquake resistance. The need for seismic retrofitting of an existing building can arise due to several reasons like. Manual on retrofitting of existing vulnerable school buildings assessment to retrofitting part ii 4 b. In such circumstances there is a tendency to build with poor materials and without too much attention to good construction techniques and safety margins. Pdf this paper presents a comprehensive overview of the techniques available for the seismic retrofitting of adobe buildings. Level of intervention gon home owner beneficiary agreement for repair and retrofit first tranche nrs. Download and read online seismic rehabilitation methods for existing buildings, ebooks in pdf, epub, tuebl mobi, kindle book. Nondestructive evaluation of concrete structures by bungey 4.
It was set in manual mode so the temperature range could be controlled to. The buildings belong to the institute autonomo case popolari iacp of. The retrot measures for the nonstructural building components are also included, which can vary according to the type of hazard and building typology of each school, and the techniques as considered appropriate by the structuralengineer or worksupervisor. For buildings with large seismic deficiencies, a combination of conventional and frp strengthening techniques may prove to be an effective retrofitting solution. Seismic retrofitting strategies of reinforced concrete buildings. International journal of engineering and techniques volume 3 issue 3, mayjune 2017 research article open access assessment of damaged building by using retrofitting techniques case study kalpesh r. The retrofitting of building structures involves improving its performance in earthquakes through one or more of. This may achieve the retrofit objectives for buildings with lightly insufficient seismic resistance. This second question, dealing with building performance during seismic events, is currently being addressed by several agencies involved with building code determination and public safety. Jacketing is excellent for column but it may not be too effective for beam or slab. Retrofitting, base isolation, retrofitting techniques, jacketing, earthquake resistance 1. Mata2 1,2 civil engineering department, ssgbcoet, bhusaval abstract. Assessment of prototype buildings getty conservation institute 1. Study on various methods and techniques of retrofitting.
Energy retrofit can be simply categorized into conventional anddeep energy retrofit. However, it is most of the preseismic code buildings that experience the most damage and hence advanced techniques of retrofitting methods are applied to existing structures. It explains the need for a new, performancebased design code to provide a range of acceptable building behavior. The existing building can be retrofitted using various techniques like jacketing existing beams, columns, or joints, use of fibre reinforced. Earthquake creates great devastation in terms of life, money and failures of structures. Pdf seismic retrofitting techniques for historic adobe buildings. It then outlines the procedure for retrofitting a building. Structurelevel retrofits are commonly used to enhance the lateral resistance of existing structures. Several techniques have been found to be effective in retrofitting masonry buildings. At the end the main challenges that need to be addressed in building retrofitting projects are listed cost, sustainability, durability, and recommendations for fu ture research activities towards sustainable buildings retrofitting are proposed.
Transportation building, ms 7370 research report olympia, washington 985047370 14. Strategic buildings require high levels of performance during and after a seismic sequence. However, what is appropriate for one building may not necessarily be appropriate for another. This guideline presents repair and retrofitting methodologies for reinforced cement concrete buildings. Effectiveness of retrofitting techniques since there is a considerable dearth of experience and data on retrofitted structures. Abrams, new perspectives on seismic rehabilitation, proceedings of the asiapacific worshop on seismic design and retrofit of structures. Introduction to seismic retrofitting techniques earthquake creates great devastation in terms of life, money and failures of structures. Based on the simulation results obtained in this study as noted in table 5. Thegrantdistributionprocessis presentedonflowchartbelow. Retrofitting buildings for flood risk 23 to best understand a building s flood risk and opportunities for adaptation, one must be able to identify the building typology and specific flood risks, the construction methods best suited to protect the structure, as well as the appropriate codes and regulations that control adaptation techniques. Retrofitting it is a technique for upgrade the strength and structural capacity of an existingdamaged structure to enable it to safely withstand the effect of strong earthquake in future.
The buildings belong to the institute autonomo case popolari iacp of syracuse. Seismic evaluation and retrofitting of an existing building in. Different methods in building envelope energy retrofit. Text books rehabilitation and retrofitting of structures rrs notes pdf rrs pdf notes rrs pdf rrs notes. The seismic evaluation process consists of investigating if the structure meets the defined target structural performance levels. The core of the study is a resilience approach to the seismic. The economy and cost of the structure possess an important aspect to suggest suitable retrofitting techniques. The paper ends with a description of the seismic retrofitting of two reinforced concrete residential buildings in the village of solarino, near syracuse, in sicily. Upgrading of certain building systems existing structures to make them more. Pdf past earthquakes have emphasized the vulnerability of existing structures which did not satisfy modern seismic design requirements and current.
You have already seen an example of these changes, and youll learn more in the following chapters. Such retrofits for rc buildings include steel braces, post. Types of retrofitting of c o ncrete memebrs various retrofitting techniques namely global and local retrofitting techniques are adopted to achieve desired solution for an existing structure. This thesis describes the process for retrofitting a building for seismic criteria. Earthquake load is generated from the site seismicity, mass of the structures, important of buildings, degree of seismic resistant, etc.
The retrofitting techniques should be applied according to the existing strength of the component of buildings and required standard strength needed as per the building codes. Assessment of damaged building by using retrofitting techniques. Seismic analysis and retrofitting of an existing multistorey building. Example 1 is an examination of retrofitting using eab.
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