Displacementbased seismic design of reinforced concrete buildings. Development of a simplified displacementbased procedure for the seismic design and assessment of rc frame structures andrea piazza 1 and timothy j. European school of advanced studies in reduction of seismic risk rose school, co. Design requirements for seismic design category a the same as aashto lrfd 2. Pdf direct displacement based design based on priestley. Displacement based intelligent seismic assessment of. Aspects relating to characterization of seismic input for displacementbased design, and to structural representation for design verification using timehistory analysis have also received special attention. Displacementbased seismic design in bridge engineering. Displacement based seismic design of structures pdf free.
It is a simple design approach where the multidegree of freedom structure is characterized the secant stiffness and equivalent elastic damping of an equivalent singledegree of freedom structure. It is a simple design approach where the multidegreeoffreedom structure is characterized the secant stiffness and equivalent elastic damping of an equivalent singledegreeoffreedom structure. During the last years, seismic design of structures has experienced a reevaluation due to the introduction of new seismic design methodologies. The research is aimed at developing seismic methods for the design and evaluation of the seismic vulnerability of wooden structures, using a displacement based approach. Since much of the material presented in the book has not been published elsewhere, it will also be of considerable interest to researchers, and to graduate and upperlevel undergraduate students of. Accounting for pdelta effects in structures when using. Displacementbased seismic design of structures session. Aspects relating to characterization of seismic input for displacement based design, and to structural representation for design verification using timehistory analysis have also received special attention.
Proposed seismic detailing criteria for piers and wharves. Update on proposed seismic code new asce standard, seismic design of piers and wharves under development for 4 years codifies current practice of performancebased seismic design same format and legal standing as asce 7 pile supported structures only volunteer effort 3. Datta indian institute of technology delhi, india seismic. The displacement based seismic design method is applied to the design of a twostorey and an eightstorey building having concentrically braced steel frames as the lateral load resisting system. Improved direct displacementbased design procedure for. Development of a displacementbased design method for.
Direct displacementbased design requires a simplified procedure to estimate the seismic deformation of an inelastic sdf system, representing the first elastic mode of vibration of the structure. A generalized displacementbased seismic design methodology is proposed for bridge structures with rocking piers. Due to the fact that structures in seismic regions are designed to respond inelastically and the design procedure needs to be simple. Aspects relating to characterization of seismic input for displacement based design, and to structural representation for design verification using timehistory analysis have also received special. Such a promising procedure is the direct displacementbased approach, initially proposed for bridges 6 and currently forming the basis of the alternative design proce. Glotman simpson consulting engineers, 1661 west 5th avenue, vancouver, bc v6j 1n5, canada 2. Fundamentals of direct displacementbased seismic design. Displacementbased seismic design of structures by, may 24, 2007, iuss press edition, hardcover in english 1st edition. Such a promising procedure is the direct displacement based approach, initially proposed for bridges 6 and currently forming the basis of the alternative design proce. Moehle jp 1992 displacementbased design of rc structures subjected to earthquakes. The method proposed allows the design of a frame structure with pdelta induced. Equivalent damping in support of direct displacementbased. In the present work displacementbased seismic design dbsd procedures are developed for reinforced concrete wallframe structures and structures with asymmetry in their plan.
A displacementbased design of buildings for seismic forces is better able to meet the desired performance criteria than a forcebased design. Performance based seismic design principles and objectives of shanghai tower huanjun jiang. Pdf a seismic design procedure is developed to enable concrete buildings to be designed to achieve a specified acceptable level of damage. Seismic design of retaining structures gravity walls october 2009 part a. The direct displacementbased seismic design is one of the most suitable procedures which can easily be incorporated into pbsd. A displacement based design of buildings for seismic forces is better able to meet the desired performance criteria than a force based design. In this paper, an intelligent system has been created for the estimation of plastic hinge distribution and lateral ductility distribution and, also, for the assessment of existing steel structures, based on a direct displacement based design procedure. The direct displacement based seismic design is one of the most suitable procedures which can easily be incorporated into pbsd. Sdc would like to contribute to the dissemination of knowledge on seismic design of buildings by translating this. Aug 17, 2017 session 3 fundamentals for mdof systems and bridge design. This report attempts to contribute to it, by focusing on special subjects which are crucial for its further advancement. Seismic analysis of bridges using displacement based approach by chung c. Mod01 lec16 earthquake response analysis for single degree of freedom structures. Displacement based seismic design of structures is a book primarily directed towards practicing structural designers who are interested in applying performance based concepts to seismic design.
Over the following years, and in particular the past five years, an intense coordinated research effort has been underway in europe and the usa to develop the concept to the stage where it is a viable and logical alternative to. A seismic design procedure is developed to enable design of concrete wall buildings in order to achieve a specified acceptable level of damages under the designed earthquake. Displacementbased seismic design of bridges with isolation and energy dissipation devices a dissertation presented by fernando sanchezflores to the graduate school of engineering of kyoto university in partial fulfillment of. Displacement based design, which was developed on the base of priestley works 1, 2. European school for advanced studies in reduction of seismic risk rose. As part of the initial phase of this study, a literature survey was. To the authors knowledge, this marks the first application of this method to the seismic design of steel buildings. Design requirements for seismic design category b sdc b structures are designed and detailed to achieve a displacement ductility. Among them, direct displacementbased design ddbd has demonstrated its effectiveness in controlling structural displacements thus controlling the likely structural damage priestley et al, 2007. Displacementbased approach for seismic stability of retaining structures a thesis submitted to the university of manchester for the degree of doctor of philosophy in the faculty of science and engineering 2018 junied aziz bakr school of mechanical, aerospace and civil engineering. Direct displacementbased seismic design ddbd focuses the design directly on displacement demand which is more attractive than strength as a damage measure. Guidelines for displacementbased design of buildings and. Stateofart report 196 pages, isbn 9782883940659, august 2003 pdf format. Displacementbased seismic design of structures is a book primarily directed towards practicing structural designers who are interested in applying performancebased concepts to.
The usnrc has initiated a project to determine if any of the likely revisions to traditional earthquake engineering practice are relevant to seismic design of the specialized structures, systems and components of nuclear power plants and of such significance to suggest that a change in design practice might be warranted. The displacementbased seismic design method is applied to the design of a twostorey and an eightstorey building having concentrically braced steel frames as the lateral load resisting system. Fu and hamed alayed, university of maryland introduction a large number of bridges were designed and constructed at a time when bridge codes had no seismic design provisions, or when these provisions were insufficient according to current standards. Displacementbased seismic design of structures is a book primarily directed towards practicing structural designers who are interested in applying performancebased concepts to seismic design. Displacement based seismic design of structures by, may 24, 2007, iuss press edition, hardcover in english 1st edition. Priestley centre oe research and graduate studies in earthquake engineering and engineering seismology rose school. Displacement based seismic design criteria unt digital. The central idea of the direct displacement based design ddbd procedure is to design structures in order to achieve displacements corresponding to a given seismic hazard level. This dissertation aimed at contributing to the advancement of direct displacementbased seismic design ddbd method in order to ensure its wider acceptance and to enable its implementation in future codes. Aug 17, 2017 displacementbased seismic design of structures session 18. The proposed method requires the determination of yield and ultimate displacements of the structure. The tools are i a mechanical model based on the shearflexure interaction between urm and rc walls and ii an elastic model for estimating the contribution of the rc slabs to the overturning moment capacity of the system.
Based on displacementbased seismic design concepts, this paper uses a case study to show how the seismic design of mixed structural systems can satisfy the performance objectives of both the ibc and aashto codes without producing a design that is overly conservative. For a given pushover curve and effective viscous damping, the expected seismic displacement may be predicted by comparing it to the elastic design spectra demand. Psycharis displacementbased seismic design 2 forcebased seismic design codes although the structure is designed to yield during the design earthquake, only the elastic part of the response, up to yield, is examined. Development of a displacement based design approach for. Displacementbased seismic design of buildingsapplication. The analysis is based on the corresponding secant stiffness. The practice shows the simplicity of procedures based on direct displacement based design method in comparison with forcebased design method. This paper details a direct displacementbased design procedure for steel eccentrically braced frame ebf structures and gauges its performance by examining the nonlinear dynamic response of a series of case study ebf structures designed using the procedure.
A generalized displacement based seismic design methodology is proposed for bridge structures with rocking piers. Versions of the new developments reported here are already in place in recently completed seismic guidelines such as the fema 350352 documents and the iso seismic design guidelines for offshore platforms. Two structures common to nuclear power plants were chosen to compare the results of the analysis models used. Jun 07, 2014 displacement based seismic design of structures is a book primarily directed towards practicing structural designers who are interested in applying performance based concepts to seismic design. Seismic analysis of bridges using displacementbased approach. Seismic analysis of bridges using displacementbased approach by chung c. Session 3 fundamentals for mdof systems and bridge design. Development of a simplified displacement based procedure for the seismic design and assessment of rc frame structures andrea piazza 1 and timothy j.
A new method for the displacementbased design dbd of a variety of structures to resist the earthquake forces experienced by them is developed. Fundamentals of direct displacementbased seismic design and. Among them, direct displacement based design ddbd has demonstrated its effectiveness in controlling structural displacements thus controlling the likely structural damage priestley et al, 2007. Aspects relating to characterization of seismic input for displacementbased design, and to structural representation for design verification using timehistory analysis have also received special. The research is aimed at developing seismic methods for the design and evaluation of the seismic vulnerability of wooden structures, using a displacementbased approach. Sullivan 2,3 abstract displacementbased design methods can solve many deficiencies with classical force based methods, but on the other hand they require more computational and conceptual effort. This step is usually accomplished by analysis of an equivalent linear system using elastic design spectra. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Sdc would like to contribute to the dissemination of knowledge on seismic design of buildings by translating this fwog publication in english and thus extend.
In general, seismic design of bridge structures includes three main steps. Equivalent damping in support of direct displacementbased design with applications to multispan bridges. Displacement based seismic design of structures mjn priestley. Sullivan 2,3 abstract displacement based design methods can solve many deficiencies with classical force based methods, but on the other hand they require more computational and conceptual effort. Performancebased seismic design of steel moment frames. The final two chapters adapt the principles of displacement based seismic design to assessment of existing structures, and present the previously developed design information in the form of a draft building code. Pdf the concept of designing structures to achieve a specified performance limit.
To the authors knowledge, this marks the first application of this method to. Displacement based seismic design of structures pdf. Such a method would also be very e ective for seismic structural assessment. Pdf displacementbased seismic design of structures. Analytical expressions are developed for the storey drift at yield and for the storey drift capacity of ebfs, recognising that in.
While forcebased seismic design characterizes a structure in terms of elastic. The final two chapters adapt the principles of displacementbased seismic design to assessment of existing structures, and present the previously developed. Jul, 20 this paper details a direct displacement based design procedure for steel eccentrically braced frame ebf structures and gauges its performance by examining the nonlinear dynamic response of a series of case study ebf structures designed using the procedure. Accounting for pdelta effects in structures when using direct displacementbased design didier pettinga1 and nigel priestley2 1. Displacement based seismic design of structures may 24.
This chapter presents the fundamentals of the new seismic design method known as direct displacement based design. Performancebased seismic design principles and objectives. For preliminary design these parameters are determined from approximate empirical relationships. This estimation is based on the aashto 1995 specification for an earthquake of 10% probability of occurrence in 50 years, which is equivalent to a recurrence period of 475 years. Pdf direct displacementbased seismic design of concrete. Displacement based approach for seismic stability of retaining structures a thesis submitted to the university of manchester for the degree of doctor of philosophy in the faculty of science and engineering 2018 junied aziz bakr school of mechanical, aerospace and civil engineering. Guidelines for displacementbased design of buildings and bridges displacementbased seismic design has now come of age, especially for buildings. Based on displacement based seismic design concepts, this paper uses a case study to show how the seismic design of mixed structural systems can satisfy the performance objectives of both the ibc and aashto codes without producing a design that is overly conservative. In the present work displacement based seismic design dbsd procedures are developed for reinforced concrete wallframe structures and structures with asymmetry in their plan. Pdf displacementbased seismic design of timber structures. Displacementbased seismic design of structures session 18.
The resultant equations can be used in performance based design approaches such as direct displacement based seismic design to compute target drifts and system displacements for prescribed limit states based on material strains. Seismic analysis of bridges using displacementbased. Design is based on achieving a specified displacement limit state defined either by material strain limits or nonstructural drift limits under the design level. The concept of designing structures to achieve a specified performance limit state defined by strain or drift limits was first introduced, in new zealand, in 1993. Displacementbased seismic analysis of a mixed structural. Displacementbased method is often used for bridge seismic design instead of forcebased method, because structures are found to be able to carry the earthquake induced inertia forces much larger than the structural strength. Displacement based seismic design of structures mjn priestley high resolution free ebook download as pdf file. A new method for the displacement based design dbd of a variety of structures to resist the earthquake forces experienced by them is developed. In this paper, an intelligent system has been created for the estimation of plastic hinge distribution and lateral ductility distribution and, also, for the assessment of existing steel structures, based on a. Damping is assessed based on the energy radiated lost on each impact. Performancebased seismic design principles and objectives of shanghai tower huanjun jiang. The resultant equations can be used in performancebased design approaches such as direct displacementbased seismic design to compute target drifts and system displacements for prescribed limit states based on material strains. Seismic conceptual design of buildings basic principles. This bridge is to be built in the western united states in a seismic zone with an acceleration coefficient of pga 0.
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