Barubaru ini, indonesia mengeluarkan regulasi baru tentang standar perencanaan ketahanan gempa untuk bangunan gedung dan nongedung. Response spectrum analysis of asymmetrical building ijssbt. The response spectrum method of analysis is developed using the following steps. The deflected shape for a linearadd load combination which contains a response spectrum load case will display either the minimum or maximum displacements, depending on which has the greater absolute value. Sap2000 is a fullfeatured program for static analysis of structures.
Response spectra can also be used in assessing the response of linear systems with multiple modes of oscillation multidegree of freedom systems, although they are only accurate for low levels of damping. I am doing response spectrum analysis on a water tank. The problem is that when i perform a response spectrum analysis, although i am able to see stresses in local axes, the principal stresses are zero. Analysis options response spectrum analysis multiple response spectrum cases in a single run modal combinations by the srss, the cqc or the gmc gupta method directional.
Sap2000 10 response spectrum analysis murat feyzifar. Pdf response spectrum analysis for irregular multistorey. Responsespectrum analysis faq technical knowledge base. From a simple small 2d static frame analysis to a large complex 3d nonlinear dynamic analysis, sap2000 is the answer to all structural analysis and design needs.
Response spectrum analysis is performed to verify that the column. Nov 12, 2016 sap results for equivalent static and response spectrum method were nearly same. Response spectrum analysis generates the likely maximum response that a structure may experience in either direction. Response spectrum analysis provides insight into dynamic behavior by measuring pseudospectral acceleration. In dynamic analysis, it is useful to display base shear and base overturning moment for comparison with results from equivalent static analysis. Unlike other courses that are available on internet which only teach you tools of the program and not the actual procedure of the design and detailing, this. Responsespectrum analysis generates the likely maximum response that a structure may experience in either direction. Earthquake analysis with sap2000 response spectrum analysis response spectrum analysis is performed to verify that the column design is adequate. 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. The response spectrum is determined with sap 2000 software and designed in accordance with is 1893. Sap2000 linear and nonlinear static and dynamic analysis and design of threedimensional structures getting started. Square ten storied rcc building frames are analysed using etabs v9. Response spectrum analysis is performed to verify that the column design is adequate.
Sap2000 watch and learn video tutorials cover a wide range of topics, from basic product overviews to advanced subjects such as nonlinear sequential construction. Sap 2000 complete building analysis tutoone by devendra man palikhe in nepali language duration. I have a question about applying pdelta effects in sap2000 in conjunction with dynamic analyses, such as timehistory and response spectrum, as well as load combinations. For each damping value the magnitude of the response spectrum must be given over the entire range of frequencies needed, in ascending value of frequency. Responsespectrum analysis provides insight into dynamic behavior by measuring pseudospectral acceleration, velocity, or displacement as a. Pdf 38226024 etabs examples manual abdul raheem raheem.
Sep 01, 2016 the sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. Elevated water tank, response spectrum analysis, sap 2000, two mass model. Response spectrum output problem in sap2000 computers. It is well equipped to handle simplified lateral procedures, pushover analysis, response spectrum analysis, and response history analysis. Manual and sap result of story displacement, base reaction of equivalent static method were approximately same. Response spectrum analysis in sap2000 civil engineering.
From a simple small 2d static frame analysis to a large complex. The story displacement result has been obtained by using both method of dynamic analysis, and concluded that time history analysis is found to be 2 to 8% higher than that of response spectrum analysis in both type of building i. This type of analysis is useful in the case of dynamic loading like earthquakes. Jul 06, 2012 i am modeling a 3d masonry building for the needs of my master thesis, using shell thick elements. For dynamic response spectrum analysis, define theresponse spectrum function and then response spectrum case using the procedure similar to that for static case. Department of civil and environmental engineering california. Response spectrum method of analysis with simplified. Elevated water tanks tank staging fluidstructure interaction seismic analysis. Elevated water tank,response spectrum analysis, sap 2000, two mass model. The remaining issue is the determination of fundamental frequencies of the 8x8 rack. In this paper a fifteen storied commercial building is subjected to an earthquake load histogram as in the case of bhuj earthquake in.
In the time history analysis tha, dynamic response is obtained by using either modal superposition method or numerical integration method. Response spectrum analysis in sap2000 dear all in continuation to the above listed thread. The results obtained from static analysis method shows higher storey displacement values as compared to response spectrum analysis. In enclosure 2 to response, you presented calculation. C frame building it office, almora in sap 2000 v14 the average response acceleration. I have checked the post by raycxx but it is inconclusive as to the use of pdelta analysis with dynamic analysis the gravity loads are still combined with seismic using load combination but not.
An incremental response spectrum analysis procedure based. Response spectrum method of analysis mechanical engineering. The modal response spectrum procedure based on the requirements of standard section 12. The results obtained from static analysis method shows higher storey displacement. The sap name has been synonymous with stateoftheart analytical methods since its introduction over 30 years ago. The earthquake analysis capabilities of sap2000 are demonstrated using a railroad bridge bent designed in accordance with the arema.
I need to find out base shear, overturning moment, story drift and lateral displacements. Pushover vs conventional analysis in order to understand pa, the best approach would be to first see the similarities between pa and the conventional seismic analysis sa, both seismic coefficient and response spectrum methods described in is. Responsespectrum analysis technical knowledge base. For modal response history analysis, sap2000 allows an explicit damping ratio to be used in each mode. I am encountering another problem while performing response spectrum in. Response spectrum analysis of asymmetrical building.
Response spectrum output problem in sap2000 computers and. The socalled nonlinear static procedure nsp based on pushover analysis has been developed in the last decade as a practical engineering tool to estimate the inelastic. Floor response spectra generation for seismic design of. Responsespectrum analysis rsa is a lineardynamic statistical analysis method which measures the contribution from each natural mode of vibration to indicate the likely. What are the main differences between sap2000 and etabs. C frame building it office, almora in sap 2000 v14 the average response acceleration coefficient for rock sites as per is 1893 part 1. Pushover vs conventional analysis in order to understand pa, the best approach would be to first see the similarities between pa and the conventional seismic analysis sa, both seismic. Response spectrum analysis computers and structures. Modal analysis is performed to identify the modes, and the response in that mode can be picked from the response spectrum. In the 250 page eeri document he never indicated he used the response spectrum method for his research or professional. Floor response spectra generation for seismic design of buildings.
Sap 2000 and etabs training course on realworld civil. Analysis enhancements implemented incident description 16758 the undeformed shape of the structure can now be plotted for stagedconstruction load cases without the need for running the analysis. Introduction the basis of engineering seismology is the need to quantify how a given structure will respond to complex ground motions. For rocky, or hard soil sites storey shear forces in each mode the peak shear force is given by, 5. Datta department of civil engineering, iit delhi response spectrum method of analysis 0 5 10 15 20 25 30 0. Response spectrum analysis for irregular multistorey structure in seismic zone v. I am encountering another problem while performing response spectrum in sap2000 i am analysing a mat foundation in sap df is a load case with dead load and sy is for response spectrum in orthogonal y direction. Etabs, sap 2000, midas gen, all of them can do pdelta analysis with rsa or time history analysis.
Sap 2000 and etabs training course on realworld civil engineering projects this course teaches you how to use sap2000 software for structural analysis and design of residential building. The result of the study shows similar variations patternin seismic response such as base shear and storey. Learn about the sap2000 structural analysis and design program. Can sap2000 develop response spectra for a given location within. During responsespectrum analysis, loading is applied to the. The spectrum can be used in the subsequent response spectrum analysis, or it can be written to a file for future use. Sap 2000 features this program is primarily used for gravity analysis and design. 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. Response spectrum analysis this chapter describes the response spectrum analysis rsa. It is a comprehensive, easytouse, stateoftheart finiteelement analysis and design package.
The data output options are much more conducive to. Pdf response spectrum analysis for irregular multi. In this paper a fifteen storied commercial building is subjected to an earthquake load histogram as in the case of bhuj earthquake in gujarat. Sap2000 seismic analysis civil engineering community. Introduction the most direct description of an earthquake motion in time domain is provided by. A response spectrum is a plot of the peak or steadystate response displacement, velocity or acceleration of a series of oscillators of varying natural frequency, that are forced into motion. 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. Nevertheless, response spectrum has become standard terminology. Analysis options response spectrum analysis multiple response spectrum cases in a single run modal combinations by the srss, the cqc or the gmc gupta method directional combinations by the abs or the srss method 20022015 tutorial. Sap 2000 online training multisoft virtual academy. How do you decide scale factor in sap2000 while defining. Here time history of ground acceleration is used and dynamic response in the form of time history of response is obtained. For each damping value the magnitude of the response spectrum must be.
These plots show the objects that will be present in the. Sap 2000 and etabs training course on realworld civil engineering projects this course teaches you how to use sap2000 software for structural analysis and design of residential. Study of base shear and storey drift by dynamic analysis. Deformation cable supported bridge analysis and pushover analysis. Response spectrum analysis of a simple planar frame.
Response spectrum analysis stressed civilenvironmental 18 oct 08 08. Sap results for equivalent static and response spectrum method were nearly same. The problem is that when i perform a response spectrum analysis, although i. Figure 1 shows the seismic zone and intensity map of india. This video addresses the implementation of pdelta effects for both static and dynamic modal analysis, but does not discuss implementing them with load combinations that. To evaluate the seismic response of the buildings, elastic analysis was performed by using response spectrum method using the. Nov 08, 2017 response spectrum analysis of a simple planar frame. Johnson department of earth and environmental science, new mexico tech 1. Response spectrum analysis rsa, wherein, from the structural model of building, natural frequencies and natural modes are obtained. Response spectrum analysis rsa is a lineardynamic statistical analysis method which measures the contribution from each natural mode of vibration to indicate the likely maximum seismic response of an essentially elastic structure. Analysis enhancements implemented incident description 16758 the undeformed shape of the. I am modeling a 3d masonry building for the needs of my master thesis, using shell thick elements.
Jul 19, 2016 sap 2000 complete building analysis tutoone by devendra man palikhe in nepali language duration. The accelerograph records three orthogonal components of ground acceleration. Pdf sap2000 linear and nonlinear static and dynamic. To evaluate the seismic response of the buildings, elastic analysis was performed by using response spectrum method using the computer program sap2000.
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