Rehabilitation and retrofitting of structures notes rrs. Dan dubina, within the framework of rfcs steel earth steel based applications in earthquakeprone areas. Retrofitting techniques diagonal bracing vertical bracing adding steel bracings effective solution when large openings are required potential advantages. A viable design criterion of supplemental damping strategies for seismic retrofit of frame structures, recently proposed by the first author terenzi, 2018, is applied in this paper to a school. It also provides certain aspects of computer software modeling against seismic loads and shows the necessity of seismic upgrading in a steel momentframe building. Pdf advanced seismic retrofit of a mixed rcsteel structure. Many different pieces go into fabricating and erecting the framework for a steel structure. 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. Strengthening and retrofitting of existing structures. Rehabilitation and retrofitting of structures notes rrs pdf. Pdf assessment of retrofitting techniques for codedeficient.
Approximate costs of some materials used in the construction industry. Retrofitting an existing building can oftentimes be more costeffective than building a new facility. Behavior of the frame structured system is entirely different from load bearing wall structures. Generally, repairing or retrofitting of steel structures costs far less. Rehabilitations and retrofitting of structural steel. Waghmare address for correspondence acharya shrimannarayan polytechnic,piprim, wardha maharashtra abstract seismic protection of buildings is a needbased concept aimed to improve the performance of any structure. It addresses in detail specific techniques for the strengthening of. Repair can lead to increased stiffness, strength, and failure deformation. Structures draft4 published by the japan society of civil engineers hereafter maintenance guidelines. Calculated steel and concrete strains are compared to. Seismic retrofitting techniques for concrete structures.
Waghmare address for correspondence acharya shrimannarayan polytechnic,piprim, wardha maharashtra abstract seismic protection of buildings is a needbased concept aimed to improve the performance of any structure under future earthquakes. An innovative method for the seismic retrofitting of existing. Retrofit existing frame structures to increase their economy. Structural retrofit an overview sciencedirect topics. Repair and rehabilitation structural rehabilitation of. Composite materials are an excellent option to be used as external reinforcing because of their high tensile strength, lightweight, resistance to corrosion, high durability, and ease of installation. Reference rehabilitation and retrofitting of structures rrs notes pdf rrs pdf notes rrs pdf rrs notes. 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. Once the decision is made, seismic retrofitting can be. Assessment and retrofitting of existing structures eurocodes. Retrofitting strategies for steel and composite buildings. Essential to reduce hazard and losses from nonstructural elements. Types of retrofitting there are two types of retrofitting used for repairing the structures. The proposed technique consists of applying glass fiber composite laminates.
This paper presents a case study of a windinduced failure analysis of an existing steel structure and the proposed. Thus retrofitting and rehabilitation of structures can be concluded to be the best alternative. To ensure the safety and security of a building, employees, structure functionality, machinery and inventory. Over a period of time, as these structures become older, we find in them certain degradation or deterioration with resultant distress manifested in the form of cracking, splitting, delaminating, corrosion etc. Seismic retrofitting of steel and composite building structures vi. Painting of steel components exposed to weather check of displacements and. Special metal for seismic retrofitting of steel structures. If you have any doubts about this book, please comment. Bridges are strategic structures that form part of the transport infrastructure.
An innovative method for the seismic retrofitting of. Research article materials and jacketing technique for. Use of cfrp for rehabilitation of steel structures. Research article materials and jacketing technique for retrofitting of structures shri. The seismic evaluation process consists of investigating if the structure meets the defined. Seismic retrofitting of steel and composite building structures iv list of figures figure 2. Application of repair methods is expected to restore the structures to its preearthquake condition where as application of retrofitting methods to damaged structures is expected to increase strength and ductility of the. Request pdf special metal for seismic retrofitting of steel structures novel metals such as aluminium alloys, stainless steels and shape memory alloys can be used for the retrofitting of steel. Seismic retrofitting is the modification of existing structures to make them more resistant. Effects of retrofitting applications on reinforced concrete bridges by. Text books rehabilitation and retrofitting of structures rrs notes pdf rrs pdf notes rrs pdf rrs notes. In design process we must take two important points in considerations. Since buildings consume a significant amount of energy 40 percent of the nations total u.
Retrofitting of reinforced concrete rc structures can lead to increased stiffness, strength, and failure deformation. Click here to download link 1 click here to download link 2 check the above links to download rehabilitation and retrofitting of structures pdf for free. It addresses in detail specific techniques for the strengthening of traditional constructions, reinforced concrete buildings, bridges and their foundations. But, the expertise needed is not available in the basic level. Global retrofitting local retrofitting the retrofitting in which we use to repair only the structural elements is called local retrofitting. Retrofitting is any change made to an existing structure to reduce or eliminate the possibility of damage to that structure from flooding, erosion, high winds, earthquakes, or other hazards. Conclusion rehabilitation of structures embroils contribution of high end technology, advanced skills and calculations. Reference rehabilitation and retrofitting of s tructures rrs notes pdf rrs pdf notes rrs pdf rrs notes. Research article materials and jacketing technique.
Innovative strategies for seismic retrofitting of steel and composite. Wind loads are a major threat for old corroded steel structures constructed near the sea where wind speeds can be very high. Common structural deficiencies for steel and composite buildings. The use of near surface mounted fiber reinforced polymer bars for strengthening of reinforced concrete beam. Reinforced concrete bridges constructed prior to 1971 have been designed with little or no ductility considerations and are particularly vulnerable to damage when exposed to a moderate earthquakes. This chapter will give you a brief overview of structural steel. Nowadays hollow sections are used very efficiently for steel structures and inner surface of these. Rehabilitation and retrofitting of structures book free. Pdf seismic retrofitting of steel and composite building structures. Health monitoring of structures use of sensors building instrumentation. Part 1 of this manual focuses on highway bridges, and is a replacement for the federal highway administration fhwa publication seismic retrofitting manual for highway bridges which was published in 1995 as report fhward94052. Structural steel is used as the framework for many steel structures such as industrial and commercial buildings, advanced base structures, and bridges. 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 is a very responsible job to be done to save hazardous failure of structures.
Effects of retrofitting applications on reinforced. Similar to the structural use of frp in concrete structures, the structural use of frp with steel can be classified into two categories. Many different pieces go into fabricating and erecting the framework for a steel structure, and as a seabee steelworker, you must. This paper presents a case study of a windinduced failure analysis of an existing steel structure. Such deteriorated structures can be rehabilitated and retrofitted by. This paper introduces a new type of reinforcement detail for the rc.
Strengthening of steel structures with fiberreinforced. The proceeding includes documents prepared by research team form politehnica university timisoara, under supervision of acad. Such retrofits for rc buildings include steel braces, posttensioned cables, infill walls, shear walls, masonry infills, and base isolators. Feb 28, 2017 retrofitting at junction by steel plate 20. Strengthening techniques of steel structure world scientific news. Retrofitting options for reinforced concrete rc frame structures are more complicated and may be costlier than for the structures with a load bearing wall system.
There is a need to quantify the performance of the structure after repair has been carried out. Nondestructive evaluation of concrete structures by bungey 4. Pdf this report provides criteria to evaluate the performance of existing buildings with steel and composite structures, either framed or braced. In this paper a new generation of sideplate connections is proposed which is applicable for retrofitting purposes and can improve the performance of existing steel structures. The upgrade and retrofit design of 240 fivestorey resi dential steel buildings which were damaged during the. Seismic retrofitting of structures by steel bracings sciencedirect. Also, changes in service conditions, often made arbitrarily, may lead to substantial changes in the structural behaviour resulting in a degradation of the. Reinforced concrete structures often require strengthening to increase their capacity to sustain additional loads, due to change in use that resulted in additional live loads, deterioration of the load carrying elements, design errors, construction. Global retrofitting the retrofitting in which we use to repair the whole structure is called global retrofitting.
Incorporate the nonlinear characteristics of yielding structures. They should be models in providing examples of quality education and the. Rehabilitation and retrofitting of structures book is also useful to most of the students who are preparing for competitive exams. Pdf rehabilitation and retrofitting of structures notes. To make the students to gain the knowledge on quality of concrete, durability aspects, causes of deterioration, assessment of distressed structures, repairing of structures and demolition procedures. Retrofitting techniques for existing damaged buildings.
Column steel jacketing presents the best capability to improve the bridge ductility. Seismic retrofitting of steel and composite building structures. Assessment and retrofitting of existing structures. Repair and strengthening of reinforced concrete structures. Retrofitting of earthquake damaged steel buildings sciencedirect. Application of repair methods is expected to restore the structures to its preearthquake condition where as application of retrofitting methods to damaged structures. The focus of this manual is on retrofitting buildings. In buildings having steel frames, this interest in seismic retrofit stems from the realization, following the 1994 northridge earthquake, that the welded beamto. 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. In addition, many projects in the united states, the united kingdom, japan, and switzerland have shown that there is a great potential for cfrp to be used to retrofit steel structures zhao and zhang 2007. Seismic retrofitting is a suitable technology for protection of a variety of structures. These draft guidelines are designed to complement these documents and indicate standards for the retrofitting of existing concrete structures, which in recent years has been applied in an increasingly number of cases. An innovative method for the seismic retrofitting of existing steel moment frame structures using side plate technology behzad rafezy 1, quang huynh, henry gallart1, mohammad kheirollahi2 1sideplate. Text books rehabilitation and retrofitting of structures rrs notes pdf rrs pdf notes rrs pdf.
To determine seismic performance of buildings under a. Introduction to repair and strengthening of reinforced concrete structures 1. The symbols used in this chapter are from chapter 11 of the standard. Two primary methods are used to attach frp composite materials to concrete structures and to masonry, timber, and even metallic structures for retrofitting purposes. Seismic retrofitting of structures by steel bracings.
Pdf assessment and retrofitting of an existing steel structure. Predisaster preparedness strategies lead to repair retrofitting of reinforced concrete structures for ensuring satisfactory performance during earthquakes. Introduction to retrofitting retrofitting is any change made to an existing structure to reduce or eliminate the possibility of damage to that structure from flooding, erosion, high winds, earthquakes, or other hazards. Part 2 of this manual provides guidance on the assessment and retrofitting of other tyical highway structures. The european union per regulation 3052011, directive 9834ec, directive 200418ec. Retrofitting work an overview sciencedirect topics. Addition of rc structural walls adding structural walls is one of the most common structurelevel retrofitting methods to. Index seismic retrofitting manual for highway structures.
Retrofitting of structures can be done with much ease using these high strength sheets fig7. There are various methods of repair and retrofitting for earthquake damaged masonry structures in different categories. Effects of retrofitting applications on reinforced concrete bridges introduction. This report provides criteria to evaluate the performance of existing buildings with steel and composite structures, either framed or braced. The stateoftheart yasser korany 1, robert drysdale 2, samir chidiac3 abstract the vulnerability of unreinforced masonry buildings to impaired performance is a serious problem facing structural. Typical performance curve capacity curve for framed structures. It has matured in the recent years to a highly reliable technology. Effects of retrofitting applications on reinforced concrete. Once the decision is made, seismic retrofitting can be performed through several methods with various objectives such as increasing the load, deformation. Reference rehabilitation and retrofitting of s tructures rrs notes pdf rrs pdf notes rrs pdf. One method employs permanufactured rigid frp strips approximately 4 in. Structurelevel retrofit structurelevel retrofits are commonly used to enhance the lateral resistance of existing structures. The focus of this manual is on retrofitting buildings that are subject to flooding.
This book presents the fundamentals of strengthening and retrofitting approaches, solutions and technologies for existing structures. There are several factors that might decrease ultimate load capacity of concrete structures such as steel corrosion in an aggressive environment, design calculation. Conclusion seismic retrofitting techniques for concrete structures. Pdf assessment and retrofitting of an existing steel. Seismic retrofitting is the modification of existing structures so as to improve the system behaviour or its components repairstrengthening up to the performance. As steel structures play an important role in civil constructions, more attention is need for repairing and rehabilitation of such structures. Pdf seismic retrofitting of steel and composite building. Retrofitting existing buildings to improve sustainability and. Pdf the widespread detrimental effects of the earthquakes at northbridge of california and at kobe of japan on steel structures in1994 and. Because of the age of most bridges and the traffic loads they face, they require retrofitting work, as proper functioning of transportation networks is essential for the socioeconomic welfare of the population. Strengthening of structures strengthening methods retro.
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