The sap2000 static pushover analysis capabilities, which are fully integrated into the program, allow quick and easy implementation of the pushover procedures prescribed in the atc40 and fema273 documents for both two and threedimensional buildings. A horizontal force pattern prescribed in the japanese seismic code for building structures 16 was adopted. Structural analysis for performance based earthquake engineering. Shear wall modeling in sap2000 for pushover analysis n x y z figure 6. Pushover analysis of steel structure using staad tn. 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. In pushover load case for other parameters, to modify the. Pushover analysis sap2000 masonry layered the pushover analysis in the selected masonry wall model 16x16 finite element mesh size as shown in fig. The structures are analysed for equivalent static method, response spectrum method, pushover analysis. The sap2000 static pushover analysis capabilities, which are fully integrated into the program, allow quick and easy implementation of the pushover procedures prescribed in the atc40 and fema273 documents.
As the name states push over, push the building until you reach its maximum capacity to deform. Rigid links 1 story beams with rigid end offsets frame elements walls modeled by shells linear analysis walls modeled by frames pushover analysis figure 5. Pushover analysis provides a relatively simple solution than nonlinear dynamic analysis. Feb 28, 2019 this video explains how you can do pushover analysis using sap2000. Create the computational model, without pushover data, using conventional modeling techniques.
Nonlinear static analysis using sap 2000 researchgate. Mar 27, 2019 guidelines for performing pushover analysis. About 60% of the land area of our country is susceptible to damaging. Lateral load may represent the range of base shear induced by earthquake loading, and its. Evaluation of lateral load pattern in pushover analysis. Introduction the modeling and seismic analysis of bridge structures have been a major evolution over recent decades linked directly to the rapid development of digital computing. This video explains how you can do pushover analysis using sap2000. Modelling of inelastic behavior of structural components must be accounted to perform a inelastic structural analysis. The results of pushover analysis and modal pushover analysis are compared with those of time history analysis. Soil structure interaction effects on pushover analysis of.
All nonlinear properties which determine possible structure damage due to forces resulting from an earthquake are concentrated in nonlinear hinges. This leads to a reduction of the multidegreeoffreedom, mdof system, to an equivalent singledegree offreedom, esdof system, with properties predicted by a nonlinear static. The pushover curve obtained from the analysis of the structure is shown fig. Pushover analysis of steel frame structures with different. For structures with hysteretic behavior type c, the atc40 procedures led to overestimations of the. Where can i find a detailed example of pushover analysis. Pushover analysis was carried out for the basefixed superstructure to examine the yield displacements and succeeding inelastic behavior.
Comparative study of pushover analysis on rcc structures. 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. In the present study the push over analysis is performed on multistoried frame structures by using most common software sap2000 version 14. A searchable and comprehensive reference manual which covers the general technical topics fundamental to modeling, analysis, and design using sap2000, csibridge, etabs, and safe. Sap2000, etabs, and safe analysis reference, containing. Pushover analysis is commonly used to evaluate the seismic capacity of existing structures and appears in several recent guidelines for retrofit seismic design. The structures considered are 4, 8 and 12 storeys of 4 bay symmetric in both directions. I am doing pushover analysis for 12 story rc frame using sap2000 and defined hinges properties automatically from asce 41 tables after designing the. To perform pushover analyses in sap2000, users can create and apply hinge properties. Applying a force distribution force distribution to the structure in an incremental fashion while monitoring the occurrence of. A new modeling approach in the pushover analysis of.
Balafas2 1 assistant professor, division of structural engineering department of civil engineering, aristotle university of thessaloniki, 541 24 greece email. Pushover analysis in sap2000 pushover is a staticnonlinear analysis method where a structure is subjected to gravity loading and a monotonic displacement. The pushover analysis has been carried out using sap2000 v18, a product of computer and structure international. Pushover analysis first steps tutorials computers and. Pushover analysis in sap2000 civil engineering downloads.
Nonlinear static analysis pushover assumes that response is governed by a single mode of vibration, and that it is constant during the analysis distribution of lateral forces applied at storey masses. 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. Because we are trying to demonstrate as many different capabilities as reasonable, the example. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects.
It helps in understanding the deformation and cracking of a structure in case of earthquake and gives you a kind of fair unders. Pushover analysis is performing for old as well as new building. Sap2000, a stateoftheart, generalpurpose, threedimensional structural analysis program, is used as a tool for performing the pushover. Learn about the sap2000 structural analysis and design program. It can also be useful for performancebased design of new buildings that rely on ductility or redundancies to resist earthquake forces. Structural analysis for performance based earthquake. An overview of the procedure for pushover analysis is given as follows. Leslie 3 has clearly explained the pushover analysis theoretically and practically using sap2000 as the analysis tool for a multistoried building. Lateral load may represent the range of base shear induced by earthquake loading. The results of all models are analyze and compare in term of base shear, story displacement, pushover curve, spectrum curve, performance point of the structure and story drift.
Sap2000 can perform static or dynamic, linear or nonlinear analysis of structural systems. The scale factor for this load case should be kept equal to 1. Pushover analysis of a 19 story concrete shear wall building. Practical three dimensional nonlinear static pushover analysis.
Pushover analysis is a nonlinear, static structure analysis, which enables presenting structure behavior caused by different types of loads resulting from an earthquake. Sap2000 is fully equipped with us, canadian and interna. The sap2000 ultimate level includes all of the nonlinear capabilities of the advanced level and adds the following powerful features. Pushover analysis and structural performance evaluation of.
Csi sap2000 fem design of structures detailed tutorial. In pa, in the global sense, it is the base shear vb vs roof top displacement. Pdf nonlinear pushover analysis of flatslab building by. I am doing pushover analysis for 12 story rc frame using sap2000 and defined hinges properties automatically from asce 41 tables after designing the frame using response spectrum and still face. 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. Both static and dynamic analysis of bridge systems experienced ma. The details of applying the push over analysis in sap2000 are noted here explicitly. Some of the analysis parameters were suitably modified to use in a bridge structure. Since the effective time period of the building was below 2. Pushover analysis is a very useful tool for the evaluation of new and existing structures. Static pushover analysis is an attempt by the structural engineering profession to evaluate the real strength of the structure and it promises to be a useful and effective tool for performancebased design. A 12span existing rc bridge was selected for the case study. It is intended to introduce and demonstrate many of the capabilities of sap2000. Pushover analysis provided much useful information that cannot be obtained from elastic static and dynamic analysis.
On sa, the analysis results are always the elastic limit state forces moment, shear and axial forces to be designed for. This is similar to the pure eventtoevent method available for nonlinear directintegration time history analysis, and. Pushover analysis is a static, nonlinear procedure using simplified nonlinear technique to estimate seismic structural deformations. Summary and application example 102 improvement of nonlinear static seismic analysis procedures fema 440 atc40 underestimates or overestimates depends on the level of lateral strength and on the site class. Sap2000, a stateoftheart, general purpose, threedimensional structural analysis program, is used as a tool for performing the pushover. Pdf nonlinear static or pushover analysis adel osman. Pushover analysis first steps tutorials computers and structures. Figure 6 shows pushover analysis model in sap2000 where shear walls are modeled by frame elements. Recent earthquakes in which many concrete structures have been severely damaged or collapsed, have indicated the need for evaluating the seismic adequacy of existing buildings. Sap2000 watch and learn video tutorials cover a wide range of topics, from basic product overviews to advanced subjects such as nonlinear sequential construction. 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 is most suitable for determining the performance, especially for lateral loads such as earthquake or even wind. Csi sap2000 fem design of structures detailed tutorial including pushover analysis.
Static pushover analysis an overview sciencedirect topics. Pushover analysis is a nonlinear static analysis that is used to study the behavior of the building when acted upon by an. Pushover analysis is carried out for either userdefined nonlinear hinge. 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. Csi sap2000 fem design of structures detailed tutorial including pushover analysis leave a comment civil books platform, software manuals pdf elearning by admin this tutorial is quite detailed.
The csi analysis reference manual is available, in pdf format, within csi software by selecting help documentation manuals analysis reference manual. Ppt pushover analysis powerpoint presentation free to. Nonlinear static pushover analysis of an eight story rc frame. Pushover analysis and structural performance evaluation of rc building using sap2000 download. 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. The elastic stiffness of each pier is obtained thru the mean values of its material properties. Soil structure interaction, pushover analysis, rc bridge, nonlinear 1. Pushover analysis an overview sciencedirect topics. Pushover analysis of retrofitted reinforced concrete. This leads to a reduction of the multidegreeoffreedom, mdof system, to an equivalent singledegree. Standard pushover analysis using fema 356 2000 displacement coefficient method and an improved upper bound pushover.
Csi analysis reference manual computers and structures. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. The manuals are available in adobe acrobat pdf format on the sap2000 cd, and can also be accessed from within the program using the help menu. Pdf the pushover analysis, explained in its simplicity. It is an incremental static analysis used to determine the forcedisplacement relationship, or the capacity curve, for a structure or structural element. A plastic hinge model is developed to represent the nonlinear behavior of structures and, therefore, obtain the capacity curve of bridge piers. Pushover analysis in sap2000 civil engineering community. This tutorial was initially written for sap2000, though the general procedure also applies to csibridge. But the extra showing off is by collecting the soft file of the book. Pushover analysis description robot structural analysis. This paper is also intended to compare the results of pushover and nonlinear dynamic time history analyses. The five frame structures have been analyzed using the nonlinear program sap2000. A new modeling approach in the pushover analysis of masonry. The pushover analysis can provide significant perception and understanding about the weak links in the structure.
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