Pushover is a staticnonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacementcontrolled lateral load pattern which continuously increases through elastic and inelastic behavior until an ultimate condition is reached. Local seismic demands for mdof system perform pushover analysis of mdof model up to the top displacement dt determine local response quantities e. For the love of physics walter lewin may 16, 2011 duration. Pushover analysis in sap2000 civil engineering downloads. Pushover analysis using etabs and sap2000 strength of. An improved modal pushover analysis procedure for estimating. This procedure is followed by the pushover curves plotted for each structural. Sap2000 integrated finite elements analysis and design of structures sap2000 web tutorial 2 quick pushover analysis tutorial. In this paper, an improved mpa procedure is presented to estimate. Where can i find a detailed example of pushover analysis. Pdf sap2000 integrated finite elements analysis and. Using pushover analysis method in seismic analysis of bridges by hamed alayed1 and chung c. Pushover is a staticnonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacementcontrolled lateral load pattern which continuously increases through elastic.
Pushover analysis is a non linear static analysis in which the structure is subjected to gravity loads and monotonically increasing lateral load until the target displacement is reached or the collapse state of. A 12span existing rc bridge was selected for the case study. Nonlinear static analysis using sap 2000 researchgate. Pushover analysis first steps tutorials computers and structures. Guidelines and tutorial for modeling haunched steelgirder bridges. The 5, 12 and 18storey moment resisting rc frames are used for study which is located in the highly active seismic region of north india. In pushover load case for other parameters, to modify the steps at which results.
Sap2000 seismic analysis civil engineering community. It is an incremental static analysis used to determine the forcedisplacement relationship, or the capacity curve, for a structure or structural element. Sap2000 finite element software is utilized for three dimensional modeling and analyses of the example building. This procedure is followed by the pushover curves plotted for each structural model.
Nonlinear static pushover analysis of an eight story rc frame. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Sap2000 follows in the same tradition featuring a very sophisticated, intuitive and. Issa international journal of civil and structural. Pushover analysis in sap2000 civil engineering community. Inclined tensile braced building by using pushover analysis shown in figure b. On sa, the analysis results are always the elastic limit state forces moment. List of content download recorded accelerograms from the peer database upload a selected accelerogram to sap2000 run the timehistory analysis and display the results. The pushover analysis is conducted for each equivalent sdof system, and by combination of the distribution of 1 mode, 2 modes and 3 modes, the responses of modal pushover analysis are obtained. Then, pushover analyses are performed on case study frames using sap2000. Mar 11, 2014 seismic analysis is a subset of structural analysis and is the calculation of the response of a building or nonbuilding structure to earthquakes. Create the computational model, without pushover data, using conventional modeling techniques.
The general finite element package sap 2000 has been used for the analyses. To study the nonlinear mechanical characteristics of reinforced concrete shear wall structures under rare earthquakes, a single reinforced concrete shear wall model is established in sap2000 program, which. However, the procedure involves certain approximations and. Inelastic static analysis p rocedures include capacity spectrum method, displacement coeffic ient method and the secant method. This tutorial was initially written for sap2000, though the general. Note the sap 2000 nonlinear predefined nonlinear hinge properties. List of content download recorded accelerograms from the. Pushover analysis of steel structure using staad tn. The nonlinear static procedure nsp or pushover analysis, as described in fema273 1 and its successor fema356 2 is now used by the structural engineering profession as a standard tool for estimating seismic demands for buildings. I am searching for something to construct a code, not practical tutorials.
Nonlinear static analysis, or pushover analysis, has been developed over the past twenty years and has become the preferred analysis procedure for design and seismic performance evaluation purposes as the procedure is relatively simple and considers postelastic behavior. This study focuses on the practical implementation of generalized pushover analysis gpa which requires less computational effort. It is based on the design project example shown below, the complete solution of which is provided as a handout. It is part of the process of structural design, earthquake engineering or structural assessment and retrofit see structural engineering in regions where earthquakes are prevalent. Structural analysis for performance based earthquake. Pushover analysis an inelastic static analysis methods courtesy of bar. Nonlinear static pushover procedure nsp is specified in the guidelines. Pushover analysis is stopped when the structure reaches. Feb, 2016 the pushover analysis from basics presented by rahul leslie 41. Inverted v braced building by using pushover analysis shown i n figure c. Mar 27, 2019 guidelines for performing pushover analysis.
Pushover analysis and seismic retrofitting using shear walls. To overcome this limitation, a modal pushover analysis mpa procedure was proposed by chopra et al. V braced building by using pushover analysis shown in figure d. Firstly, the superiority of pushover analysis over elastic procedures in evaluating the seismic performance of a structure is discussed by identifying the advantages and limitations of the. Pushover analysis is based on the assumption that structures oscillate predominantly in the first mode or in the lower modes of vibration during a seismic event. Mar 28, 2019 a detailed and extensive procedure which describes the modeling, analysis, and design of a 3d steelframe pipe rack system.
Therefore, pushover analysis with single load pattern may not yield correct results for a bridge model. Pdf nonlinear static or pushover analysis adel osman. The pushover analysis poa procedure is difficult to apply to highrise buildings, as it cannot account for the contributions of higher modes. A modal pushover analysis procedure to estimate seismic. Structural analysis for performance based earthquake engineering.
Using sap2000 for pushover analysis we will use the same frame elastic beams, just. Sap2000 manual sap2000 is a program developed by the company csi, computer and structures, inc. Pushover analysis provided much useful information that cannot be obtained from elastic static and dynamic analysis. In pa, in the global sense, it is the base shear vb vs roof top displacement. I am doing pushover analysis for 12 story rc frame using sap2000 and defined.
Sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software. In the case of the modal pushover analysis procedure, the base shear force, v b n from each modal pushover analysis is converted into a modal equivalent sdof pseudoacceleration, a n using 8 a n. It is intended to introduce and demonstrate many of the capabilities of sap2000. A detailed and extensive procedure which describes the modeling, analysis, and design of a 3d steelframe pipe rack system. Csi sap2000 fem design of structures detailed tutorial. This tutorial was initially written for sap2000, though the general procedure also applies to csibridge. During this procedure, monotonically increased lat. The nonlinear static procedure nsp or pushover analysis, as described in fema273 1 and its successor fema356 2 is now used by the structural engineering profession as a standard tool for. Scaling of ground motions for performing incremental dynamic. Scaling of ground motions for performing incremental.
This leads to a reduction of the multidegreeoffreedom, mdof system, to an equivalent singledegree. The pushover analysis is conducted for each equivalent sdof system, and by combination of the distribution of 1 mode, 2 modes and 3 modes, the responses of modal pushover analysis are. Using sap2000 software package in earthquake engineering. Application of pushover analysis for the calculation of behavior factor for reinforced concrete momentresisting frames mohamed s. Pushover analysis and seismic retrofitting using shear walls and bracing system of frame structure. Practical implementation of generalized pushover analysis. This tutorial provides an introduction to the assignment of joint patterns. The results of pushover analysis and modal pushover analysis are compared with those of time history analysis. Recall that a main step in the nspa procedure is the. Standard pushover analysis using fema 356 2000 displacement coefficient method and an improved upper bound pushover analysis method were used to analyse the building.
Pushover analysis provides a relatively simple solution than nonlinear dynamic analysis. This displacement should be monitored in the considered direction of analysis i. Pushover analysis first steps tutorials computers and. This document is for pushover analysis using etabs and sap2000. Pushover analysis using etabs and sap2000 free ebook download as pdf file. The structure has been evaluated using pushover analysis, a non linear static procedure, which may be considered as a series of static analysis carried out to develop a pushover curve for the building. Sap 2000 tutorial session notes mit opencourseware. Pushover analysis is a static, nonlinear procedure using simplified nonlinear technique to estimate seismic structural deformations.
The example problem for this tutorial is a steelframe building two bays wide by two. For the pushover analyses realized with concentrated hinges, sap 2000 5 and midascivil 6 are in fact the two commercial software used to reach such goal. It is based on the design project example shown below, the complete solution of. Sap2000 follows in the same tradition featuring a very sophisticated, intuitive and versatile user interface powered by an unmatched analysis engine and design tools for engineers working on transportation, industrial, public works, sports, and other facilities. Practical implementation of generalized pushover analysis for. Dec 06, 2014 pushover is a staticnonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacementcontrolled lateral load pattern which continuously increases through elastic and inelastic behavior until an ultimate condition is reached. Global seismic demand for mdof system transform sdof displacement demand to the top displacement of the mdof model dt sd 7. Pushover analysis is a non linear static analysis in which the structure is subjected to gravity loads and monotonically increasing lateral load until the target displacement is reached or the collapse state of the structure is reached.
Sap 2000 tutorial, sap 2000 tutorial analysis of dynamic vehicle loading v12s. Structural software for analysis and design sap2000. However, invariable lateral force distributions are still adopted in the mpa. Nonlinear analysissap 2000 5 displacement is kept equal to 2% of the height of the building. Pushover analysis is based on the assumption that structures oscillate predominantly in the first mode or in the lower modes of vibration during a seismic. Nonlinear static pushover procedure nsp is specified in the guidelines for seismic rehabilitation of buildings presented by fema273 1 as an analytical procedure that can be used in systematic rehabilitation of structures. Pushover analysis and seismic retrofitting using shear. Sap2000 detailed tutorial including pushover analysis ii. Pushover analysis provided much useful information that cannot be obtained from elastic static and dynamic. Dec 05, 2014 for the love of physics walter lewin may 16, 2011 duration. Pushover analysis is a very useful tool for the evaluation of new and existing structures. Instructional material complementing fema 451, design examples advanced analysis 155b 1 structural analysis for performance.
Applying a force distribution force distribution to the. Pushover is a staticnonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacementcontrolled lateral load pattern which continuously increases. On sa, the analysis results are always the elastic limit state forces moment, shear and axial forces to be designed for. Lateral load may represent the range of base shear induced by earthquake loading. Inclined compression braced building by using pushover analysis s hown in f igure a. Hinge and pmm in sap 2000 v12 pushover analysis philipckwusa civilenvironmental op. Nonlinear static analysis, or pushover analysis, has been developed over the past twenty years and has become the preferred analysis procedure for design and seismic performance evaluation purposes as. The objective of seismic resistant design is to have no structuralnonstructural damage in low magnitude earthquakes, limited and repairable damage in moderate earthquakes and life safety for extreme earthquakes. Firstly, the superiority of pushover analysis over elastic procedures in evaluating the seismic performance of a structure is discussed by identifying the advantages and limitations of the procedure. Segment oa has time period ta, curve a representing the rs curve and saa is the lateral load demand, in its elastic range. It is an incremental static analysis used to determine the force. An overview of the procedure for pushover analysis is given as follows. Fema and caltrans hinge options which you can assign.
Target performance dictated by codes dbybhy 2007, section 1. Timehistory with sap2000 databases function mathematics. Jan 19, 2019 nonlinear static pushover analysis in csi sap2000. Fema 451b topic 155b notes advanced analysis 155b 1 instructional material complementing fema 451, design examples advanced analysis 155b 1 structural analysis for performancebased earthquake engineering basic modeling concepts nonlinear static pushover analysis nonlinear dynamic response history analysis. Push over procedure is gaining popularity during the last few years as appropriate analytical tools are now available sap2000. Sap 2000 tutorial session notes this tutorial provides the basic steps of performing a frame analysis using sap 2000. The pushover analysis from basics presented by rahul leslie 42. Nonlinear analysis sap 2000 5 displacement is kept equal to 2% of the height of the building.
Pushover analysis of steel structure using staad tn ram. Sap 2000 tutorial analysis of dynamic vehicle loading v12s. The structure has been evaluated using pushover analysis, a non. Learn about the sap2000 structural analysis and design program. Sep 30, 2010 pushover analysis analisa pushover dengan etabs 2000 berbicara tentang bangunan tinggi dan beban gempa, berarti kita juga sedang membahas pushover analysis dimana kita mengasumsikan bahwa sebuah gedung di dorong oleh beban lateral secara cyclic dan continue sampai gedung tersebut mengalami kondisi kritis. The pushover analysis from basics presented by rahul leslie 41.
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