Nseismic design assessment and retrofitting of concrete buildings pdf

Minimum design loads for buildings and other structures3 and in the commentary to 7. Seismic design of reinforced concrete special moment frames. Pushover analysis and seismic retrofitting using shear walls. As a result, this paper focuson how to provide a sues ccessful optimisation method for a particular building type, high rise reinforced concrete buildings. Pdf analysis and modelling for seismic design or assessment of concrete buildings. Apr 14, 2015 fardis mn 2009 seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8. Seismic design, assessment and retrofitting of concrete buildings based on eneurocode 8 book january 2009 with 467 reads how we measure reads. Seismic retrofitting techniques linkedin slideshare. Keywords masonary infill wall, equivalent diagonal strut, reinforced concrete, retrofitting. Atc40 seismic evaluation and retrofit of concrete buildings. Basis of structural design for buildings and public works. 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.

These buildings have been designed according to eurocodes 1992 1 and 19981 2, whilst afterwards their seismic capacity has been evaluated for various levels of earthquake excitations and respective seismic performance levels, according to the seismic performance matrix of euro. This thesis also intends to give out the fundamental notions in part 1 of eurocode 8, which are useful for the assessment and retrofit of buildings. The additional requirements of ti 80904, seismic design for buildings and fema 302, nehrp recommended provisions for the seismic design of new buildings and other structures will apply. Guidelines for seismic rehabilitation of buildings fema 273. The design of new buildings for seismic resistance was not fully implemented until the 1980s in many countries, including portugal.

Seismic evaluation of existing reinforced concrete building. Approaches adding new shear walls frequently used for retrofitting of non ductile reinforced concrete frame buildings. In principle, this basis of structural design requires explicit treatment of. Analysis seismic retrofitting of building using sap2000. If the building is cast insitu it is possible to start the activities on site in an early stage. 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. Seismic design, assessment and retrofitting of concrete. After briefly introducing how seismic action is described for design purposes, methods for assessing the seismic vulnerability of existing buildings are presented.

Assessment of prototype buildings etty conservation institute 4. Seismic evaluation and retrofit of existing buildings asce. General principles for the design of concrete buildings for earthquake resistance. Concrete structures condition assessment guidelines. Seismic retrofitting techniques for concrete structures. Simulated design for the generic structural configuration has to respect building codes and design practices in force at the time of construction.

Seismic retrofit of concrete buildings civil engineering. The concrete centre, part of the mpa mineral products association mpa is the trade association for aggregates, asphalt, cement, concrete, dimension stone, lime, mortar and silica sand industries. Concrete seismic retrofitting techniques update on. A guide for practicing engineers applied technology council.

Concrete buildings can either be cast insitu, composed with precast elements or a combination of both. The retrofitting of existing buildings for seismic criteria. Design of connections for precast prestressed concrete. 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. Proposed methodology is explained on the example of two buildings with the explanation of performed strengthening methods. Seismic activity, retrofitting, rc jacketing, staad pro v8i 1. The continuous monitoring of reinforced concrete structures using the appropriate. Design of connections for precast prestressed concrete buildings for the effects of earthquake phase 2 of a threephase program by d. Topic 11 seismic design of reinforced concrete structures. There is a nominal strength that is reduced by a factor which must exceed the factored design stress. Performance based earthquake engineering, whether used for risk assessment and retrofit of existing buildings or design of new ones, is beginning to provide a framework for determination and measurement of these losses.

Three target pls are used for the retrofitting design of the. The main purpose of the eurocode 8 part 1, design of structures for. After briefly introducing how seismic action is described for design purposes, methods for assessing the seismic vulnerability of existing buildings are. Commentary 1 the fundamentals of ordinary design and construction of concrete structures are covered in the standard. Seismic retrofit of reinforced concrete buildings in japan. Tu 2 1department of construction engineering, national taiwan university of science and technology, taiwan 2national center for research on earthquake engineering, taiwan abstract. The retrofitting of existing buildings for seismic criteria by christa besing b. Retrofitting of concrete course documentation structures.

Correctly explain the fundamental difference between new design standards and the standard for evaluation and retrofit of existing buildings. Construction of the integral edge girder where the columns are located away from the edge of the roadway i. Pdf condition assessment of existing concrete 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. The guidelines support seismic assessments for a range of purposes, including assessing potentially earthquakeprone buildings when required by the building act 2004.

Seismic retrofitting is a suitable technology for protection of a variety of structures. Comprehensive walkthrough examples of detailed design elucidate the application of eurocode 8 to common situations in practical design. 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. Funding for the 2015 eeri technical seminar series was provided under a cooperative agreement emw2015ca00203s01 with femau. Manual for design and detailing of reinforced concrete to. 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. Xyzs preliminary upgrade design corrects this problem in two ways. During this lesson you will learn the basics of seismic design of reinforced concrete buildings. This is especially so in earthquakeprone regions, as, even there, seismic design of structures is relatively recent. 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. Seminar on seismic design and retrofit of bridges deck and the new edge girder. Assessment and retrofitting of buildings, published in june 2005 by cen as the first european standard for assessment and retrofitting of existing structures.

Based on eneurocode 8 geotechnical, geological and earthquake engineering 2009 by fardis, michael n. Seismic evaluation and retrofit of existing buildings. Conclusion seismic retrofitting techniques for concrete structures. This paper investigates seismic performance and vulnerability analysis of 4storey and 6storey codeconforming is. Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. New elements preferably be placed at the exterior of the building. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci committee 340, design. Converting the liner life cycle model of concrete elements to a cyclic one required new ways of designing concrete structures and buildings to support disassembly potential for reuse and adaptation, where elements such as wall panels, roof slabs, and even columns and beams can be disassembled without material loss or pollution to be reused in extending existing building or in the production of. Numerical investigation of seismic behavior of spatial. Seismic risk assessment of reinforced concrete buildings c. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2.

The seismic retrofitting of reinforced concrete buildings not designed to withstand seismic action is considered. Seismic assessment of an old reinforced concrete building. Seismic assessment and retrofitting of structures iabse. There are conflicts between the concrete structures and earthquake loading standards, and the reinforcement detailing requirements within the. 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. Geotechnical, geological, and earthquake engineering, vol 8. Stanford libraries official online search tool for books, media, journals, databases, government documents and more.

The assessment of the existing buildings state with the use of nondestructive testing method is studied in 10. The performance based design approach is based on matching various probable earthquakes with target performance levels pls. It has matured in the recent years to a highly reliable technology. Structural integrity requirements for concrete buildings. Our aim is to enable all those involved in the design, use and performance of concrete and masonry to realise the potential of these materials. Aug 27, 2009 buy seismic design, assessment and retrofitting of concrete buildings. Seismic retrofitting of concrete buildings recommended improvements to asce41 joe maffei. The 2005 draft of the turkish seismic design code, produced in 2005 by the ministry. After the lapse of about five years, the first edition is now on the way to revising for updating and introducing the newest concepts for maintenance of concrete structures.

Different retrofitting method are studied in this work. Errors and defects in the conceptual design cannot be compensated for in the following calculations and detailed design of the engineer. The recent earthquakes have exposed the vulnerability of the existing reinforced concrete buildings in india. Jan 29, 2016 civilax on nanosoft nanocad design bim v1.

This chapter is the only one in the book devoted exclusively to existing concrete buildings. In order to examine the performance of these models, the response spectrum analysis for seismic evaluation of existing buildings is performed. Though not applicable to all building types, the document also discusses some costeffective strengthening schemes for existing older buildings identified as seismically deficient during the evaluation process. The construction price of retrofitted buildings is compared to the price of demolishing the existing and building a new building. The standard presents a threetiered process for seismic evaluation according to a range.

Guidelines for evaluation and repair of masonry and concrete walls fema 306. Seismic assessment and retrofit of reinforced concrete buildings. Seismic evaluation and strengthening of existing buildings. Seismic evaluation and retrofit of existing buildings, standard ascesei 4117, describes deficiencybased and systematic procedures that use performancebased principles to evaluate and retrofit existing buildings to withstand the effects of earthquakes. Seismic risk assessment of reinforced concrete buildings. Design of structures for earthquake resistance part 3. 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. Also it is concluded that the effect of infill plays very crucial role in seismic evaluation of existing rc buildings. 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. This basis of structural design for buildings and public works covers structures in general and provides the basic direction for establishing and revising technical standards related to structural design. For buildings with large seismic deficiencies, a combination of conventional. Seismic design, assessment and retrofitting of concrete buildings.

Successfully use asce 41 tier 1 screening to identify common seismic deficiencies with various types of older buildings. General principles for the design ofconcrete buildings fur earthquake resistance. Seismic assessment and retrofitting of existing buildings, according to the eurocode 8 part 3. Seismic conceptual design of buildings basic principles for.

Sustainable buildings are achieved through integrated building designan approach to design and construction that involves the participation of owners, contractors, suppliers, building users, and design professionals during the initial design phase and at other key points in the design process. Clough a research investigation by abam engineers inc. Seismic design, assessment and retrofitting of concrete buildings by michael n. Tronac1 1university of agronomic sciences and veterinary medicine, romania 2national institute for research and development, urbanincerc and european centre for building rehabilitation, ecbr, romania abstract. Seismic assessment and retrofit of existing rc buildings. 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.

Design of seismic retrofitting of reinforced concrete structures s. 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. Seismic retrofitting a performance based approach is used for the seismic retrofitting of the buildings considered in this study. Seismic retrofitting of reinforced concrete structures. The speakers in this seminar provide updates on the status of ongoing efforts to reduce the risk posed by these buildings, and provide insight and appropriate actions to take. The bhuj earthq uake 2001 saw a great deal of damage to multistorey buildings in the urban area of gujarat. But, the expertise needed is not available in the basic level. 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. Pdf seismic evaluation of existing reinforced concrete. Written by the lead person in the development of the eneurocode 8, the present handbook explains. Data and models useful for analyzing reinforced concrete structures as well as numerous illustrations, tables, and equations are included in this detailed reference.

The jsce standard specifications for concrete structures2001 maintenance was firstly issued in january 2001. Seismic assessment and retrofitting of existing buildings, according to the eurocode 8. Seismic design of reinforced concrete structures topic 11 is the seismic design of reinforced concrete structures, primarily buildings. Methods to evaluate the seismic safety of existing reinforced concrete buildings became important, as did proce two types of seismic retrofits have been developed in japan for use on existing reinforced concrete buildings. In multistory buildings, shear failures are story mechanisms. Concrete structures are to be designed to resist the effects of earthquake ground motions. The following sections illustrate the aci 31805 requirements for structural in concreteframed construction. 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. Atc40 seismic evaluation and retrofit of concrete buildings volume 1 by applied technology council 555 twin dolphin drive, suite 550 redwood city, california 94065 funded by seismic safety commission state of california products 1. Seismic evaluation and retrofitting of buildings and. 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. Following the publication of eneurocode 8 in 200405, 30 countries are now. Following the publication of eneurocode 8 in 200405, 30 countries are now introducing this european standard for seismic design. Seismic assessment of nonseismically designed structures generally results in pointing.

Seismic assessment and retrofitting of existing concrete. Fardis, 9789400736696, available at book depository with free delivery worldwide. The most important contributions about reinforced concrete existing. Assessment and retrofitting of existing structures. However, the manual may also be useful for the seismic design of taller or more unusual structures. A seismically correct conceptual design is furthermore necessary in order to achieve a good earthquake resistance without incurring significant additional costs. A simulated design procedure for the assessment of seismic. Examples and case studies of seismic assessment and retrofitting of a few real buildings are also presented. Buildings designed using these principles will fare better in a seismic event than the building shown in this slide. Design of seismic retrofitting of reinforced concrete structures. Modelling, assessment and strengthening of existing buildings stelios antoniou simultaneously, he is the head of the seismic repair and strengthening section of alfakat s.