The design lateral shear force at each floor in each mode is computed by staad in accordance with. Response spectrum analysis for irregular multistorey structure in seismic. Comparison of the results of analysis of irregular structures with regular structure is done. Response spectrum analysis dynamic in stadd pro v8i on is1893. The design base shear vb calculated from the response spectrum method is compared with the base shear vb calculated by empirical formula for the fundamental time period. The material properties such as grade of concrete, yield strength of steel, modulus of elasticity and. It is one of the softwares applications created to help structural engineers to automate their task and to remove the tedious and long procedures of the manual methods. Staad pro software manuals civil engineering community. Using the acceleration response spectrum, an equivalent static load is derived which will provide the same maximum response as that obtained in each. Staad proresponse spectrum building engineering engineering. Dynamic and seismic analysis in staad pro learn staad pro at home learn staad pro in arabic mat foundation using staadfoundation advanced offshore loading module for staad pro performing a modal response spectrum analysis staad foundation users manual staad pro 2005 graphical environment staad pro 2006 getting started and tutorials.
The natural frequencies obtained during a response spectrum analysis do not match the calculate rayleigh frequency when specifying damping, the displacements and forces remain same why are beam graphs not displayed for response spectrum load cases in staad. Staad utilizes the following procedure to generate the lateral seismic loads. In order to perform analysis and design, select the run analysis option from the analyze menu. Dynamic analysis of multistory building using response. This staad pro tutorial provides dynamic analysis using response spectrum method in staad. 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. Sep 10, 20 the response spectrum method of analysis is developed using the following steps. Should i specify response spectrum in all directions in. Pdf dynamic seismic analysis of rcc building as per is. Smart learning technologies india private limited 21,506 views. Should i specify response spectrum in all directions in the. Comparison between different shapes of structure by. The building was modelled, analysed and designed in staad. The design lateral force at each floor in each mode is computed by.
A comparison is done between the static and dynamic analysis, the results such as bending moment, nodal displacements, mode shapes are observed, compared. Pro v8idynamic response spectrum seismic analysis video training chapter1 what is earthquake types of seismic waves classification seismotonics of india earth quake zone general effects of earthquakes types of damage and reason effects of earthquakes site selection building construction materials horizontal and vertical shaking of a structure building planning earthquake resistant. The response spectrum method of analysis is developed using the following steps. Comparison of results of earthquake load applied on the structure by staad pro and manual calculations both by seismic coefficient method. In this paper, the response spectrum analysis is performed on two different shapes i. Parameters like base shear, building displacement, frequency, storey drift and spectral acceleration are compared for isolated building and non isolated building. Seismic analysis of highrise building by response spectrum. Pro eigen vector or ritz vector analysis etabs the modal parameters for a structure come as pairs of natural frequency f in hz mode shape f.
This analysis is done with response spectrum method, and using staad pro software. Gust factor method for wind loading, modal analysis and response spectrum analysis for earthquake loading have been considered. To develop, design and analysis model of the high rise structure in staadpro. Pdf response spectrum analysis for irregular multistorey. Pdf dynamic seismic analysis of rcc building as per is 1893. Base isolation, damping, energy dissipation, response spectrum, stiffness. Gust factor method is used for wind load analysis, modal analysis and response spectrum analysis are used for earthquake loading. Introduction response spectrum is one of the useful tools of earthquake engineering for analyzing the performance of structures especially in earthquakes, since many systems behave as single degree of freedom systems.
In response spectrum method, the time periods, natural frequencies and mode shape coefficients are calculated by staadpro software and. If vb is less than vb, all of the response quantities are multiplied by vb vb as per clause 7. Dynamic analysis of multistory building using response spectrum. Use of signed response quantities in response spectrum analysis.
And the comparison results are studied and compared accounting for the earthquake characteristics and the. The detailed comparative study on dynamic analysis is been made to ensure the seismic design for major and frequent shaking intensity without any damage, to eliminate the problem faced by the unsigned response spectrum and srss method in staad pro due to the interaction of axial force. Comparative study of static and dynamic seismic analysis. Response spectrum analysis is performed using multi mode responses, where the free vibration modes are computed using eigen vector analysis staad. This module covers the advance topics of dynamic and seismic analysis in staad pro, including the seismic equivelent lateral forces procedure, mode shapes, frequencies, participation factors, seismic response spectrum analysis and time history analysis. Different models, that is, bare frame, brace frame and shear wall frame are considered in staad pro. Response spectrum analysis as per is1983 in staad pro. Comparison of results of earthquake load applied on the structure by staadpro and manual calculations both by seismic coefficient method. Analysis and design of a 3d frame get two months free at skillshare. It is considering that the building vibrates in its fundamental mode.
Epub response spectrum analysis using etabs example. Jul 03, 2014 this module covers the advance topics of dynamic and seismic analysis in staad pro, including the seismic equivelent lateral forces procedure, mode shapes, frequencies, participation factors, seismic response spectrum analysis and time history analysis. Response spectrum analysis in staad part 2 explanation. Seismic analysis of rcc building with shear walls using. Theoretical basis for response spectrum calculations in spectral analysis understand that the method of determining response spectrum sasat for a given diagram of accelerations ft, where t refers to period, sa refers to acceleration spectrum, t refers to time, while ft is a given time analysis function. Comparison between response spectrum and time history. Dynamic analysis has been done using staad pro software. Pro generates the elastic response spectra using the guidelines of section 4. Aug 30, 20 response spectrum analysis in staad explanation video methodology. References are provided to other resources for the use of response spectrum curves, selection and scaling of ground motions, and. Seismic analyzed coefficient method analysis is done using manual calculation and response spectrum method analysis is done using staadprov8i. Smart learning technologies india private limited 21,626 views 9. Several procedures for nonlinear static and dynamic analysis of structures have been developed in recent years.
Responsespectrum 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. Response spectrum specification in conjunction with indian is. Introduction this research paper studies the introduction of plan irregularity which is harmful to the structure as it increases the torsion irregularity, shear force, bending moment and other earthquake parameters. Comparative study of equivalent static analysis and. Iit staad pro tutorialsadvanceddynamic analysis using response spectrum methodday 29 staad, staadpro, staad pro tutorials, tutorial media genre, dynamic, analysis, response, spectrum. In pa, the distribution is proportional to height raised to the power of k, where k equivalent to 2 in the.
Response spectrum analysis in staad explanation video methodology. Keywords structural analysis and design, high rise building, response spectrum, plan irregularity, staadpro v8i. Comparative study of static and dynamic seismic analysis of a. In this study the aim is to analyze the response of a highrise structure to ground motion using response spectrum analysis. This reduction is accomplished by introducing the behavior factor q and the reduced response spectrum is termed as design response spectrum. Seismic design of buildings worked examples worked examples presented at the workshop ec 8. A comparative analysis on absolute and srss methods of. This paper helps in understanding the effect of both wind and seismic forces on the tower structures by considering different height of towers with different bracing systems.
Pro v8idynamic response spectrum seismic analysis video training dvd duration. Seismic performance of base isolated multistorey building. Keywords dynamic analysis, response spectrum method, absolute method, srss method, joint displacement, story drift, staad pro analysis, staad generic method. In this paper a comparative analysis is being carried out for different heights of towers using different bracing patterns for wind zones i to vi and earthquake zones ii to v of india. Pro will create load cases for the first specified number of modes for this response spectrum case i. Responsespectrum analysis technical knowledge base. Iitstaad protutorialsadvanceddynamic analysis using response spectrum methodday 29 staad, staadpro, staad pro tutorials, tutorial media. V8i dynamic analysis response spectrum analysis as per is1983 in staad pro. Confirmation with indian standard codes, versatile nature of solving any type of problem, easy to use interface. So long as you are incorporating pdelta effects using a stiffness reduction rather than an iterative pdelta approach i think it can be done with dynamic response spectrum analysis. Jul 05, 2018 in response spectrum method, the time periods, natural frequencies and mode shape coefficients are calculated by staad pro software and remaining process will be done by manually. To compare equivalent static analysis and response spectrum analysis method on flat slab for above parameters.
The effect of bare frame, brace frame and shear wall frame was studied under the earthquake loading. Response spectrum specification as per the indian is. Seismic force analysis, staadprov8i software, response spectrum method, seismic coefficient method. Iitstaad protutorialsadvanceddynamic analysis using. Structural final report pennsylvania state university.
Using response spectrum method with the help of analysis and design tool staad pro v8i, to evaluate analysis parameters such as nodal displacement, shear forces in column, compressive and tensile. The design lateral shear force at each floor in each mode is computed by staad in accordance with the is. V8i comresponsespectrumanalysisasperis1983instaadprov8i. This paper consider different seismic parameter like seismic zoneiv, response reduction factorr. Each case will be created in a form like any other primary load case. The result is obtained and studied and compared to derive conclusion.
Seismic response spectrum analysis, staad pro, dynamic characteristics, earthquake response peak 1. Mar 01, 2015 dynamic and seismic analysis in staad pro learn staad pro at home learn staad pro in arabic mat foundation using staadfoundation advanced offshore loading module for staad pro performing a modal response spectrum analysis staad foundation users manual staad pro 2005 graphical environment staad pro 2006 getting started and tutorials. Richard behr nicole trujillo albuquerque, nm april 4, 2012. Use of response spectrum analysis results in structural design. References are provided to other resources for the use of response spectrum curves, selection and scaling of ground motions, and definition of additional parameters required for the. Response spectrum analysis provides insight into dynamic behavior by measuring pseudospectral acceleration. Analysis on absolute and srss methods of response spectrum using staad pro written. Study of base shear and storey drift by dynamic analysis.
Staad protutorialsadvanceddynamic analysis using response. Pro is a structural analysis and design computer program with graphical user interface. Study of seismic and wind load applied to the structure as per is 875 and is 1893. Aug 25, 20 response spectrum specification as per the indian is. Therefore, if the structure is supposed to resist seismic actions in the nonlinear. Analysis of building with response spectrum method seismic analysis of highrise building having following data is analyzed for different models of lateral load resisting systems. Responsespectrum analysis provides insight into dynamic behavior by measuring pseudospectral acceleration, velocity, or. Some models are prepared that is bare frame, brace frame and shear wall frame. After preparing the bare model, seismic definition for is 18932002 was created by giving the. In staad pro, response spectrum analysis is done as follows. Response spectrum method of analysis with simplified. A concrete gravity dam model is prepared in staadpro to perform the time history analysis and response spectrum analysis and a comparison is done between both these methods. Instructional material complementing fema 451, design examples seismic load analysis 9 17 1a, 1b stiffness soft story irregularity vertical structural irregularities irregularity 1a exists if stiffness of any story is less than 70% of the stiffness of the story above or less than 80% of the average stiffness of the three stories above. Pro v8idynamic response spectrum seismic analysisvideo training chapter1 what is earthquake types of seismic waves classification seismotonics of india earth quake zone general effects of earthquakes types of damage and reason effects of earthquakes site selection building construction materials horizontal and vertical shaking of.