Using sap2000 software package in earthquake engineering part ii. This paper is mainly focused on behaviour of concrete gravity damwithnonlinear characteristics using seismic time history analysis. The input files for the programs used, the history of the seismic. As stated in the csi analysis reference manual time integration parameters, page 362, using alpha 0 is most accurate, but may permit excessive vibrations in higher. So it is necessary to enhance the seismic performance of asymmetric buildings by using. Sap2000 seismic analysis civil engineering community. Timehistory analysis technical knowledge base computers and. Response spectrum and time history analysis seismic. This is a minitutorial prepared for the structural analysis of a sample beam. I have tried it with both auto and manual hinges at calculated plastic hinge. Equivalent static method was simpler than response spectrum method, but static analysis was not sufficient for highrise building.
Time history analysis with recorded accelerograms slideshare. A typical limitstatebased design can be viewed as one i. Earthquake analysis with sap2000 earthquake analysis example part 2 nonlinear static analysis nonlinear static analysis is performed to verify that the bent cap and footing design is adequate. Features bridge analysis, design and rating csibridge. Five different time histories have been used considering seismic intensities v, vi, vii, viii, ix and x on modified. Model a pendulum system in sap2000 using largedisplacement timehistory analysis.
The building under consideration is modeled with the help of sap2000v. Timehistory analysis faq technical knowledge base computers. Nonlinear structural analysis for seismic design, nehrp seismic design technical brief no. Access ensure that a modal analysis has already been defined. Pdf etabsexamplerc building seismic load time history. Introduction the most direct description of an earthquake motion in time domain is provided by accelerograms that are recorded by instruments called strong motion accelerographs. Anseismic seismic analysis of structures with ansys and. Sap2000 a stepbystep guide for bengmengmsc students familiarizing with this piece of software. Civilax is the knowledge base covering all disciplines in civil engineering. Select the units you want to work with from the status bar at the bottom of the sap2000 window. 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. Abstractin this paper study of nonlinear dynamic time history analysis of twenty three storied rcc residential building considering different seismic earthquake intensities is carried out and response of such building due to earthquake is studied. Csi has implemented a comprehensive quality management system to ensure that customer expectations and industry requirements are not only met but exceeded.
The time history of floor displacement, drift, base shear, and overturning moment is computed for both. Time history analysis captures the stepbystep response of structures to seismic ground motion and other types of loading such as blast, machinery, wind, waves, etc. The same model was used for elf, modalresponsespectrum, and modaltime. For directintegration timehistory analysis, it is often useful to set a nonzero hilberhughestaylor hht alpha value 0. Select time history in the analysis type dialog, and then click ok. Method the list of methods that you can use to perform the time history analysis. In order to study the precise behaviour of structures, seismic time history or. Many buildings in the present scenario have irregular configurations both in plan and elevation.
What value of scale factor should i use to define a timehistory load case. Timehistory analysis provides for linear or nonlinear evaluation of. Csi analysis and reference manual for sap2000, etabs and safe 2. In this chapter, we provide an overview of the time history seismic analysis applied for. The third part of this volume, the sap2000 introductory tutorial manual, is intended to provide first time users with handson experience using the modeling, analysis and design features of sap2000. Sap2000 tutorial manual 3 building the model in sap2000 using templates 1. 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. Modeling 3 storey building with storey height 3m having 4 bays of 5 m in x and 3 bays of 5m in y directions for seismic zone v was modeled in sap2000.
One of the main problems in time history analysis is the definition of a proper input and arranging the records for different structural analysis programs. Analysis can use modal superposition or directintegration methods, and both can be linear or nonlinear. 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. Timehistory seismic analysis with sap2000 a stepbystep guide for bengmeng msc students familiarizing with this piece of software. It is an ultimate tool to study the dynamic response of a structure. Its very important for the dam to survive against seismic vibrations. Non linear time history analysis of building with seismic. Nonlinear dynamic time history analysis of multistoried. Timehistory analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function. Using sap2000 software package in earthquake engineering. Using sap2000 for pushover analysis we will use the same frame elastic beams, just modify dead loads. Comparative study of static and dynamic seismic analysis. Most of the current seismic design codes belong to the category of prescriptive design procedures or limitstate design procedures, where if a number of checks are satisfied, then the structure is considered safe since it fulfills the safety criterion against collapse. Time history is basically a method of seismic analysis for the simulation of an earthquake motion.
We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. For the responsespectrum results, the program of reference 1 uses the square root of the sum of the squares srss method of modal combination. Time history seismic analysis with sap2000 a stepbystep guide for bengmengmsc students. The accelerograph records three orthogonal components of ground acceleration. Seismic load analysis by sap2000 manual mazda 6 garage manual bridge seismic analysis and design documentation john deere la145 maintenance sap2000 integrated structural analysis and design software service for kawasaki mule 550 kaf300c neeshub resources. To make the building earthquake resistant against seismic effect.
Non linear time history analysis of base isolated rcc building in etabs part 1 duration. The advantage of these linear dynamic procedures with respect to linear static procedures is that higher modes can be considered. Furthermore, one or more furthermore, one or more 242 levels of seismic intensity, typically corresponding to one. Time history analysis, seismic responses, multistoried buildings. Time history analysis in sap2000 structural analysis. Nonlinear time history analysis of concrete gravity dam. Significant options of sap2000 activated threedimensional frame analysis use of biaxial nllink frictionpendulum elements nonlinear quasistatic time history analysis nonlinear time history analysis computer model the structure is modeled as a reinforced concrete frame with 9 column lines and 12 bays. 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. You can create time history function and analysis case in which the time history case is applied to an acceleration instead of a displacement or force. Lowmoderate seismic loads and building vibration 3. Use this dialog to set up time history analysis parameters for a dynamic case. The analysis of the structure for accidental torsion was performed on sap2000. In the case of transient analyses, ground acceleration time history data are used for seismic analysis.
The history of time and the history of time and series is calculated for the approval of the terms. Seismic analysis of completely buried rectangular concrete. Since 2008, csi has been certified iso 9001compliant by det norske veritas, an independent certification agency accredited by the international organization for standardization. Seismic analysis of completely buried rectangular concrete reservoir. Seismic analysis of structures with ansys and sap2000. Effective analysis of many types such as static, modal, nonlinear, seismic, time history analysis etc. Though sap2000 has no inbuilt fluid elements to capture the behavior of.
Analysis seawi presentation from sam rubenzer of forse consulting april 27, 2012 1. Explicit time integration, not dependent on the size of the time steps, is used in sap2000. Stateoftheart engineering analysis solvers gives structural engineers the calculation speed to deliver accurate engineering analysis results for demanding structures in minutes versus hours support for reporting analysis results. This in future may be subjected to devastating earthquakes. Seismic analysis of a asymmetrical building in sap2000. 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. This paper gives a step by step procedure to perform the nonlinear time history analysis by using time. The basics about structural building dynamics dynamic analysis 4. Response history analysis of structures with seismic.