The response spectrum method, on the other hand, is relatively more rapid, concise, and economical. Time history analysis results were tabulated in the form of base shear, absolute displacement, and absolute acceleration at top floor. Time history analysis with sap2000 all about civil engineering. These tags are assigned by the program and may not be edited. A time history analysis uses the mass, stiffness and damping matrices to solve for the forced vibration of the structure due to an applied load that varies with time. Seismic analysis of a normal building and floating column. Learn about the sap2000 structural analysis and design program.
What is the difference between time history analysis and. Rc chimney with the design manually calculated base shear results. Ive been able sap2000 api using matlab time history analysis computers and structures. Timehistory analysis first steps tutorials computers and. Time history and response spectrum methods are the two basic methods that are commonly used for the seismic dynamic analysis. Assign load conditions to the model through assign joint loads or frame loads. Select define functions time history to define a timehistory function which characterizes load variation over time.
The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Fajfar p 2000 a nonlinear analysis method for performancebased seismic design. A concrete gravity dam model is prepared in sap 2000 to perform the time history analysis. In the present study seismic evaluation of the 9 story concrete building frame, analysis as per is 1893 2000 has been carried out by 2d nonlinear time history analysis, for four load cases. Multiple loads or lines of data may be assigned within a given time history tag. Sap2000 represents the most sophisticated and userfriendly release of the sap series of computer programs. It is based on the design project example shown below, the complete solution of which is provided as a handout. Introduction chimneys are answerable for industrial growth in any country and changes in the various parameters or. In general, the advanced program is required to perform nonlinear analyses, with the exception being.
May 26, 2009 time history seismic analysis with sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. Complex models can be generated and meshed with powerful builtin templates. Research on timehistory input methodology of seismic. What is the difference between time history analysis and push. This procedure requires the execution of a nonlinear static analysis of a structure, which allows. Seismic analysis of a asymmetrical building in sap2000.
Time history analysis is used to determine the seismic response of a structure under dynamic loading of representative earthquake wilkinson and hiley, 2006 tables 1 and 2 structural modeling and analysis the finite element analysis software sap 2000 nonlinear is utilized to create 3d model and run all analyses. Time history analysis in sap2000 structural analysis. Performance evaluation compare local and global seismic demands with the capacities for the relevant performance level. Timehistory analysis first steps tutorials computers. Structural software for analysis and design sap2000.
Response spectrum analysis is performed to verify that the column design is adequate. The timehistory method is relatively more time consuming, lengthy and costly. Timehistory with sap2000 databases function mathematics. Cablestayed bridges are becoming increasingly popular in north america, with several recent designs in locations with relatively high seismicity. Using sap2000 software package in earthquake engineering. Null steps happen is nonlinear analysis as when the elements go beyond the yield point, they start losing stiffness. Create the model and assign support conditions to restrained joints. For a time history or response spectrum seismic input, i define the dynamic function per the define function menu. Industrial chimneys, rcc and steel chimney, seismic analysis, sap 2000, base shear and time history. Csi etabs 21 time history analysis scale factor discussed part 1 duration.
Now the basic equations for nonlinear finite element analysis is. Ground motion at specific supports manual multisupport excitation. The advantage of these linear dynamic procedures with respect to linear static procedures is that higher modes can be considered. Research on timehistory input methodology of seismic analysis. The recent increase in the speed and capacity of personal computers has made it practical to run many timehistory analyses in a short period of time. List of content download recorded accelerograms from the peer database upload a selected accelerogram to sap2000 run the timehistory analysis and display the results. Timehistory analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function.
Sap2000 seismic analysis civil engineering community. Earthquake analysis with sap2000 prepare finite element model column properties. Drain2dx, indyas, sap, strudl, statik, etabs and sofistik. For timehistory analysis, sap2000 allows an explicit damping ratio to be used. The recent increase in the speed and capacity of personal computers has made it practical to run many time history analyses in a short period of time. This procedure requires the execution of a nonlinear static analysis of a. The modeling and analysis of humaninduced vibrations due to footfalls or another type of impact. Displacement timehistory record technical knowledge base. Select define functions time history to define a time history function which characterizes load variation over time. Non linear time history analysis of base isolated rcc building in etabs part 1 duration. In the present paper sap 2000 v8 is used to carry out the pushover analysis to a test building. Acceleration loads are explained further in the csi analysis reference manual chapter xvii. I then add that function to my seismic load case as shown here. Im trying to run an time history analysis using the sap api with matlab to run several different 100s of time history records on a structure.
What is difference between time history analysis and response. Since i am looking at the asce 705 load combinations, and considering directional effects from seismic loading, i have defined my load combinations as such. Enter values shown below and click ok point mmy rotsf a 0 0 b 1 0 c 1 0. I need to place dampers in the structures and the responses of the building are of critical importance. Show analysis model if available show joints only for. Integrated design code features can automatically generate wind, wave, bridge and seismic loads with automatic steel and concrete design code checks per. Nonlinear time history analysis of tall structure for. As you can see, sap2000 is a powerful structural analysis tool and can be used. This paper also studies the variation of the both structures by applying the intensities of the past earthquakes i. Nonlinear time history analysis of concrete gravity dam. Sap2000 tutorials training videos, manuals and model files download. Directintegration timehistory analysis technical knowledge base.
Wilsons text static and dynamic analysis of structures. Sap2000 is the latest version in the popular sap series of commercial structural analysis programs. Jul 21, 2014 fajfar p 2000 a nonlinear analysis method for performancebased seismic design. Seismic assessment of a rc building according to fema 356 and. For a timehistory or response spectrum seismic input, i define the dynamic function per the define function menu. What is difference between time history analysis and. Ceen 545 lecture 14 time history development duration. Each time history load definitions is automatically assigned a tag such as t1, t2, et cetera as shown on the left side of the spreadsheet. Timehistory analysis technical knowledge base computers. Follow sap2000 manual to build up a nonlinear analysis and which kind on. The time history analysis tha perhaps is an analysis develop the new time history or respon spectra corespond to structural analysis need. How can i perform incremental dynamic analysis on sap 2000.
Mar 11, 2014 the seismic input is modelled using either modal spectral analysis or time history analysis but in both cases, the corresponding internal forces and displacements are determined using linear elastic analysis. Jun 30, 2015 civilax on the history of the theory of structures. Jun 29, 2015 seismic analysis of a asymmetrical building in sap2000. Local seismic demands for mdof system perform pushover analysis of mdof model up to the top displacement dt determine local response quantities e. Seismic assessment of a rc building according to fema 356. Therefore, the program must have information about the force as a function of time applied to the structure and the structures damping in order to solve the dynamic analysis. Sap 2000 tutorial session notes this tutorial provides the basic steps of performing a frame analysis using sap 2000.
List of content download recorded accelerograms from the peer database upload a selected accelerogram to sap2000 run the time history analysis and display the results. The time history method is relatively more time consuming, lengthy and costly. Users will be able to use sap 2000 for all of their analysis and design tasks, including small daytoday problems. When an acceleration record is specified for timehistory analysis. Directintegration timehistory analysis is a nonlinear, dynamic analysis. Pdf 38226024 etabs examples manual abdul raheem raheem. Ground acceleration excitation multiple base excitations. It was released in 1997 and can be usedfor the dynamic analysis of structures with seismic isolation and energy dissipation systems. Non linear inelastic time history analysis in sap2000 jdgengineer structural 25 jun 12 01.
Finite element has been widely used in the analysis of concrete gravity dams with a defined approach as presented in this paper. Response history analysis of structures with seismic. Sap2000 api using matlab time history analysis computers. Seismic analysis of fixed based and base isolated building. Time history analysis in sap2000 structural analysis software. Time history is basically a method of seismic analysis for the simulation of an earthquake motion. It is an incremental static analysis which is used to determine the forcedisplacement relationship or t. Sap2000 can also analyze seismic cases using linear or nonlinear time history dynamic analysis. Section designer sap2000 section designer sd comes integrated with every sap2000 license, and calculates cross sectional properties and moment curvatures of irregular and builtup sections modeled as a framebeam element. Sap 2000 tutorial session notes mit opencourseware. This chapter presents two examples that focus on the dynamic analysis of steel. Timehistory analysis may be initiated using the process which follows. Note that displacement and elastic force response will be in m and n, respectively.
Time history loads are included in the analysis by referencing this tag in the load combinations spreadsheet. Therefore, dynamic analysis methods forestimating the response of a concrete gravity dam plays an extraordinary role. Sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software. In this report, five examples are used to verify the results obtained by sap2000. The seismic input is modelled using either modal spectral analysis or time history analysis but in both cases, the corresponding internal forces and displacements are determined using linear elastic analysis.
Sap2000 multipendulum model newtons cradle model a pendulum system in sap2000 using largedisplacement time history analysis. Comparison between response spectrum and time history. I am modelling a 3 d 10 storied steel structure building for seismic loading. From arch analysis to computational mechanics civilax on nanosoft nanocad design bim v1.
Nonlinear analyses can be static andor time history, with options for fna nonlinear time history dynamic analysis and direct integration. Non linear inelastic time history analysis in sap2000. Timehistory seismic analysis with sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Non linear time history analysis of base isolated rcc buildings in etabs part 2 duration. Is there a way to reduce the null steps of time history. Salajeghehb auniversity of shahrekord, shahrekord, iran bbahonar university of kerman, kerman, iran abstract fast wavelet transforms fwt and discrete wavelet neural networks dwn are used for dynamic analysis of structures. Displacement and elastic force time history of some stories are shown in figures 4 and 5. From a simple small 2d static frame analysis to a large complex 3d nonlinear dynamic analysis, sap2000 is the easiest, most productive solution for your structural analysis and design needs. This paper presents the dynamic nonlinear time history analysis of a concrete gravity dam by using csi sap 2000. A pushover analysis is a static, nonlinear procedure using a simplified, nonlinear technique to estimate seismic structural deformations. Civilax on the history of the theory of structures. Time history analysis may be initiated using the process which follows.
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