This manual also helps in understanding the assumptions and procedures used in sap2000. Sap2000 manual sap2000 is a program developed by the company csi, computer and structures, inc. Using sap2000 for pushover analysis we will use the same frame elastic beams, just modify dead loads. Instructional material complementing fema 451, design examples advanced analysis 155b 1 structural analysis for performance. Pdf nonlinear static or pushover analysis adel osman.
I am doing pushover analysis for 12 story rc frame using sap2000 and. An alternative pushover analysis procedure to estimate. Nonlinear static pushover analysis of an eight story rc frame. Structural software for analysis and design sap2000. Since the effective time period of the building was below 2. Pushover analysis first steps tutorials computers and. Create the computational model, without pushover data, using conventional modeling techniques.
This procedure requires the execution of a nonlinear static analysis of a. Pushover analysis in sap2000 civil engineering community. For the conversion from modal pushover roof displacement, u r n to modal sdof displacement, d n, the modal pushover analysis. Design reinforcedconcrete columns and beams while considering combined performance measures and interactionsurface output. 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 v b n m n. Sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software. Pushover analysis of steel structure using staad tn. Then, pushover analyses are performed on case study frames using sap2000. Sap 2000 tutorial analysis of dynamic vehicle loading v12s. This tutorial was initially written for sap2000, though the general. Overview of the procedure for timehistory analysis. To overcome this limitation, a modal pushover analysis mpa procedure was proposed by chopra et al. In the present paper sap 2000 v8 is used to carry out the pushover analysis to a test building.
Applying a force distribution force distribution to the structure in an incremental fashion while monitoring the occurrence of. Csi sap2000 fem design of structures detailed tutorial including pushover analysis. The pushover analysis from basics presented by rahul leslie 41. In literature, some improved pushover procedures have been proposed to overcome the certain. How do i implement pushover analysis in sap2000 for the. 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. An overview of the procedure for pushover analysis is given as follows. Sap 2000 tutorial,sap 2000 tutorial analysis of dynamic vehicle loading v12s. 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 post. 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. I have tried it with both auto and manual hinges at calculated plastic hinge location. Note the sap 2000 nonlinear predefined nonlinear hinge properties.
Practical three dimensional nonlinear static pushover analysis. Lateral load may represent the range of base shear induced by earthquake loading, and its configuration may be proportional to. However nsp suffers from a major drawback in that it is restricted with a singlemode response and therefore the procedure can be. It is strongly recommended that you read this manual and work the tutorial before attempting a real project using sap2000. Sap11 procedure for federal cash draws revised 0502. In pushover load case for other parameters, to modify the steps at which results. The sequence of cracking, plastic hinging and failure of the. On sa, the analysis results are always the elastic limit state forces moment, shear and axial forces to be designed for. A simple example of a pushover analysis is illustrated in figure 1. 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. This video explains how you can do pushover analysis using sap2000. Nonlinear static procedure for fragility curve development.
The pushover analysis poa procedure is difficult to apply to highrise buildings, as it cannot account for the contributions of higher modes. Hi experts, i am about to run a pushover analysis of my model to establish a comparative study. Using sap2000 software package in earthquake engineering. Structural analysis for performance based earthquake. Pushover analysis is a nonlinear static analysis that is used to study the behavior of the building when acted upon by an. Timehistory with sap2000 databases function mathematics. Learn about the sap2000 structural analysis and design program. Fema and caltrans hinge options which you can assign without defining anything beforehand, or the fiber pmm hinge which you need to define before assigning. The pushover analysis from basics presented by rahul leslie 42. After pushover analysis hinges formation in each stage of a building are calculated, also from figure 6. View and download parker brothers pushover instruction manual online.
Segment oa has time period ta, curve a representing the rs curve and saa is the lateral load demand, in its elastic range. Sap10 internal controls over cash receipts revised 0911 16. 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 is simulated by nonlinear multilayer shell element. The results of pushover analysis and modal pushover analysis. Pushover analysis first steps tutorials computers and structures. Using pushover analysis method in seismic analysis of bridges by hamed alayed1 and chung c. This study focuses on the practical implementation of generalized pushover analysis gpa which requires less computational effort. This is a basic procedure to apply hinges and provide pushover loads. This leads to a reduction of the multidegreeoffreedom, mdof. A 12span existing rc bridge was selected for the case study. Pushover analysis is a bit lengthy process but its interesting so share this video to all civil engineers. Practical implementation of generalized pushover analysis.
Sap2000 static pushover analysis capabilities, which are fully integrated into the program, allow quick and easy implementation of the pushover procedures. 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. The pushover curve obtained from the analysis of the structure is shown fig. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Sap12 overhead for auxiliary fund accounts revised 1211. Ultimate limit state analysis and design of plated structures, 2nd edition 2018 fundamentals of building construction. Pushover analysis is a static, nonlinear procedure using simplified nonlinear technique to estimate seismic structural deformations. If youre trying to match sap results with another program. Therefore, pushover analysis with single load pattern may not yield correct results for a bridge model.
An overview of the designcheck procedure for steelframe structural systems. 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. Global seismic demand for mdof system transform sdof displacement demand to the top displacement of the mdof model dt sd 7. But the question is, how is it possible to run a pushover analysis in sap2000 using distributed load. A modal pushover analysis procedure to estimate seismic. Materials and methods, 7th edition edward allen, joseph iano 2019. Drain2dx, indyas, sap, strudl, statik, etabs and sofistik. Csi sap2000 fem design of structures detailed tutorial. Procedure in pushover analysis the magnitude of the lateral load is increased monotonically maintaining a predefined distribution pattern along the height of the building. Sap2000 finite element software is utilized for three dimensional modeling and analyses of the example building. An incremental response spectrum analysis procedure based. List of content download recorded accelerograms from the peer database upload a selected accelerogram to sap2000 run the timehistory analysis and display the results. Etabs 2015 tutorial 7 pushover analysis using is codes.
The general finite element package sap 2000 has been used for the analyses. In pa, in the global sense, it is the base shear vb vs roof top displacement. Pushover analyses were performed by both drain 2dx and sap2000. Sap14 compensated absences liabilities revised 1211. Pushover analysis in sap2000 civil engineering downloads. Structural analysis program, sap2000 manual 8 explains the basic and the complete set of modeling and analysis features. 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. Scribd is the worlds largest social reading and publishing site. Building is displaced till the control node reaches target displacement or building collapses. It is an incremental static analysis used to determine the forcedisplacement relationship, or the capacity curve, for a structure or structural element. Hinge and pmm in sap 2000 v12 pushover analysis philipckwusa civilenvironmental op.
Nonlinear static analysis using sap 2000 researchgate. Pushover analysis and seismic retrofitting using shear. 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. However, invariable lateral force distributions are still adopted in the mpa. Additional information can be found in the online help facility available. This tutorial was initially written for sap2000, though the general procedure also applies to csibridge. The structure has been evaluated using pushover analysis, a non. Pushover analysis and seismic retrofitting using shear walls and bracing system of frame structure. This procedure requires the execution of a nonlinear static analysis of a structure, which allows. Recall that a main step in the nspa procedure is the conversion of the pushover curve in the force vs. Local seismic demands for mdof system perform pushover analysis of mdof model up to the top displacement dt determine local response quantities e. In this paper, an improved mpa procedure is presented to. Nonlinear static pushover analysis of the model is presented by uniform acceleration lateral load pattern and inverted triangle lateral. Where can i find a detailed example of pushover analysis.
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