Seismic assessment and retrofitting of existing concrete. Review of retrofitting methods to reduce seismic vulnerability of buildings, with particular reference to hospitals and medical facilities dina dayala, carmine galasso, stylianos minas. In addition a dual plastic hinge design concept for improving the performance and optimizing the. Seismic evaluation of existing reinforced concrete building. It allows to produce an adequate assessment of a of seismic stability level. New developments report on efforts of the committee for seismic repair and. Calculation of reinforced concrete structures with a set. Seismic retrofitting techniques for concrete structures. Calculation of the design seismic base shear, v b the total design lateral force or design seismic base shear, v b as per clause 7. Design assessment and retrofitting and retrofitting of rc. The assessment of reinforced concrete bridges under seismic action needs the ability to model the effective nonlinear response in order to identify the relevant failure modes of the structure. Design of seismic retrofitting of reinforced concrete structures s. The seismic retrofitting of reinforced concrete buildings not designed to withstand seismic action is considered.
This chapter is the only one in the book devoted exclusively to existing concrete buildings. Seismic design, assessment and retrofitting of concrete buildings. The seismic performance of new rc buildings, which. Jci activity on iso standard for seismic evaluation of. Seismic evaluation and retrofit of existing buildings standards. Seismic retrofit is an effective technique by which the building. After briefly introducing how seismic action is described for design purposes, methods for assessing the seismic vulnerability of existing buildings are. The guidelines support seismic assessments for a range of purposes, including assessing potentially earthquakeprone buildings when required by the building act 2004.
The isocd 16711 standard for seismic assessment and retrofit of concrete structures is discussed in isotc 71sc 7wg 4. In the present article, all the necessary information for the simulation of plastic hinges of rc members, as well as that for the simulation of masonry infill walls is given in detail. Assessment and retrofitting of existing structures. Generally, the structural retrofit of concentrically braced frames improved the seismic resistance of the building.
Design of seismic retrofitting of reinforced concrete structures. Fardis and others published seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8 find, read and cite all the. Written by the lead person in the development of the eneurocode 8, the present handbook explains. Seismic assessment of existing reinforced concrete. Paulay department of civil engineering university of canterbury christchurch new zealand m. Moehle played a leading role on several teams to develop professional guidance and design standards, including improved seismic design guidelines for california highway bridges atc 32. Causes for the unsatisfactory seismic performance of these rc frame buildings lie in a the poor choice of a building site, b.
Dritsos department of civil engineering, university of patras, patras, greece abstract as knowledge increases and buildings in seismic regions are designed with higher degrees of safety, it becomes clear that older structures may require upgrading. Jan 29, 2016 civilax on nanosoft nanocad design bim v1. Modern seismic design of existing structures is moving towards a displacement capacity assessment of the structure. Pushover analysis and seismic retrofitting using shear walls. Seismic design of reinforced concrete special moment frames. Written by the lead person in the development of the eneurocode 8, the present handbook explains the principles and rationale of seismic design according to modern codes and provides thorough guidance for the conceptual seismic design of concrete buildings and their foundations. Pdf seismic evaluation of existing reinforced concrete. The recent earthquakes have exposed the vulnerability of the existing reinforced concrete buildings in india. A direct simulation of concrete, reinforcement and their binding with the help of volumetric and core finite elements is fulfilled. The bhuj earthq uake 2001 saw a great deal of damage to multistorey buildings in the urban area of gujarat. Seismic design of reinforced concrete structures 465 10. Examples and case studies of seismic assessment and retrofitting of a few real buildings are also presented.
Successfully use asce 41 tier 1 screening to identify common seismic deficiencies with various types of older buildings. A seismically correct conceptual design is furthermore necessary in order to achieve a good earthquake resistance without incurring significant additional costs. Seismic retrofitting is a suitable technology for protection of a variety of structures. Also examined are the modern trends in performance and displacementbased seismic assessment of existing buildings, comparing the relevant provisions of eurocode 8 with those of new us prestandards, and details of the most common and popular seismic retrofitting techniques for concrete buildings and guidance for retrofitting strategies at the. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. The most important contributions about reinforced concrete existing. B h where, w is the seismic weight of the building a h is the horizontal seismic coefficient. In order to examine the performance of these models, the response spectrum analysis for seismic evaluation of existing buildings is performed.
Review of retrofitting methods to reduce seismic vulnerability of buildings, with particular reference to hospitals and medical facilities dina dayala, carmine galasso, stylianos minas and viviana novelli june 2015. The screening checklists included in appendix c of this standard are also available separately as fillable pdf forms that can be completed using adobe acrobat reader. The performance based design approach is based on matching various probable earthquakes with target performance levels pls. Guidelines for seismic rehabilitation of buildings fema 273. Priestley department of applied mechanics and engineering sciences university of california sun diego, usa a. Aug 27, 2009 buy seismic design, assessment and retrofitting of concrete buildings. Following the publication of eneurocode 8 in 200405, 30 countries are now. Conclusion seismic retrofitting techniques for concrete structures. Simplified design of reinforced concrete buildings fourth edition mahmoud e. Retrofitting of concrete course documentation structures. Seismic design of reinforced concrete and masonry building 1.
Assessment and retrofitting of buildings, published in june 2005 by cen as the first european standard for assessment and retrofitting of existing structures. Seismic design of reinforced concrete structures topic 11 is the seismic design of reinforced concrete structures, primarily buildings. Seismic retrofitting a performance based approach is used for the seismic retrofitting of the buildings considered in this study. The method is validated with the experimental response of a fullscale 7 story building. Owing to the increasing awareness of the threat posed by existing buildings substandard and deficient buildings and the lack of national or international standards for assessment and retrofitting, its impact in that field is expected to be major. Reflecting the historic first european seismic code, this professional book focuses on seismic design, assessment and retrofitting of concrete buildings, with thorough reference to, and application of, eneurocode 8. A simulated design procedure for the assessment of seismic. Standard ascesei 41 serves structural engineers, design professionals, code officials, and building owners interested in improving the seismic performance of existing buildings. Correctly explain the fundamental difference between new design standards and the standard for evaluation and retrofit of existing buildings.
Based on eneurocode 8 geotechnical, geological and earthquake engineering 2009 by fardis, michael n. But, the expertise needed is not available in the basic level. The article discusses a calculation technique for a reinforced concrete building with a braced frame on an earthquake. Even in regions where unreinforced masonry is currently allowed, older unreinforced masonry buildings may exist in a deteriorated. After extensive research into the development of design codes and rules, a complete database was compiled that collects the main codified design parameters such as design loads gravitational, seismic, material allowable stresses, minimum. Data and models useful for analyzing reinforced concrete structures as well as numerous illustrations, tables, and equations are included in this detailed reference. After briefly introducing how seismic action is described for design purposes, methods for assessing the seismic vulnerability of existing buildings are presented. Errors and defects in the conceptual design cannot be compensated for in the following calculations and detailed design of the engineer. There are conflicts between the concrete structures and earthquake loading standards, and the reinforcement detailing requirements within the. Seismic evaluation of existing reinforced concrete building columns article pdf available in earthquake spectra 124. Seismic conceptual design of buildings basic principles for. Buildings designed using these principles will fare better in a seismic event than the building shown in this slide.
Seismic assessment of nonseismically designed structures generally results in pointing. A guide for practicing engineers applied technology council. The seismic assessment of existing buildings the guidelines provides a technical basis for engineers to carry out seismic assessments of existing buildings within new zealand. Pdf the seismic retrofitting of reinforced concrete buildings not designed to. Seismic risk assessment and retrofitting download ebook. The framework of seismic assessment and retrofit is shown in figure 8. Novak an organization of cement companies to improve and extend the uses of portland cement and concrete through market development, engineering, research, education, and public affairs work. Topic 11 seismic design of reinforced concrete structures. Guidelines for evaluation and repair of masonry and concrete walls fema 306.
Seismic assessment and retrofit the eurocode 8 part3, assessment and retrofitting of buildings, reflects the latest tendencies in the seismic design of structures, especially the displacementbased approach 7 8. The performance of building is to be accessed in order to determine the. Buy seismic design, assessment and retrofitting of concrete buildings. Seismic evaluation and retrofit of existing buildings asce. Design of structures for earthquake resistance part 3. Numerical investigation of seismic behavior of spatial. Analysis seismic retrofitting of building using sap2000. The 2005 draft of the turkish seismic design code, produced in 2005 by the ministry. Jun 07, 2014 owing to the increasing awareness of the threat posed by existing buildings substandard and deficient buildings and the lack of national or international standards for assessment and retrofitting, its impact in that field is expected to be major. Assessment of seismic strengthening solutions for existing. Seismic retrofitting of existing structures pdxscholar portland. Simulated design for the generic structural configuration has to respect building codes and design practices in force at the time of construction. Apr 02, 2015 simplified design of reinforced concrete buildings fourth edition mahmoud e.
Design methods, both at a basic level as required by current building codes and at an advanced level needed for special problems such as seismic performance assessment, are described. Ductility, energy absorption, and damage modelling of concrete structural elements, proceedings of the international conference on recent trends in concrete seismic evaluation and retrofitting. During this lesson you will learn the basics of seismic design of reinforced concrete buildings. It has matured in the recent years to a highly reliable technology. After briefly introducing how seismic action is described for design purposes, methods for assessing the seismic vulnerability of existing. Comprehensive walkthrough examples of detailed design elucidate the application of eurocode 8 to common situations in practical design. For monolithic elements, curves and formulas exist to evaluate the values for the yield strength and for the displacements at both the yield stage and at the failure stage. Seismic design, testing and analysis of reinforced concrete.
Three target pls are used for the retrofitting design of the. Chapter 1, for the seismic performance requirements that may be apply to existing buildings and to their upgrading, chapter 2, for the demonstration of the inherent vulnerability of substandard existing buildings. Fardis published seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8. Fardis mn 2009 seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8. In multistory buildings, shear failures are story mechanisms.
In chapter 3 preliminary assessment and investigation items are listed, and the targeted building is judged. Apr 14, 2015 fardis mn 2009 seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8. Reflecting the historic first european seismic code, this professional book focuses on seismic design, assessment and retrofitting of concrete buildings, with thorough reference to, and. To gain clarity over the necessity to perform a retrofit, existing buildings have to be examined with regards to earthquakes. Seismic evaluation and retrofitting of buildings and. Seismic design of reinforced concrete and masonry building. Retrofitting design of kathmandu university library building. Application of the method to reinforced concrete wall buildings is discussed. Following the publication of eneurocode 8 in 200405, 30 countries are now introducing this european standard for. General principles for the design ofconcrete buildings fur earthquake resistance. The study has developed the necessary reliability framework for the systematic determination of the acceptable risk for the earthquakeresistant design of reinforced concrete buildings in tokyo. Pdf seismic retrofitting of reinforced concrete buildings using. Seismic design, assessment and retrofitting of concrete.
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