Analysis of High Rise Multistoried Building With and without Shear Wall By Response Spectrum Method

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p ISSN: 2395 0072

Analysis of High Rise Multistoried Building With and without Shear Wall By Response Spectrum Method

Abhishek Yadav 1 , Prince Yadav 2

1PG Student (MTech. Structural Eng.), Civil Engineering Department, Institute of Engineering and Technology, Lucknow

2Assistant Professor, Civil Engineering Department, Institute of Engineering and Technology, Lucknow ***

Abstract Structural engineers are primarily concerned with determining how a structure behaves when subjected to horizontal forces, and appropriate stiffness is essential for high rise buildings to withstand horizontal forces caused by wind and earthquakes. Shear walls, which are added to the inside of the proposed building, are used to combat horizontal forces, such as lateral stresses created by earthquakes, and to offer greater stiffness to the structure. This work uses Response Spectrum Analysis to investigate the use of with and without Shear walls at various positions in a G + 15 multi story residential building, as wellasthenatureofthestructure exposed to earthquakes. Storey drift, storey displacement, storey pressures, storey response, storey shear, and storey stiffness are investigated in a multi story building with G +15. The whole structure is analysed and modelled using the software ETABs 2016 in seismic zone 3 for a regularstructure, and it is concluded that the structure with symmetrically positioned shear walls will perform better in terms of all seismic parameters than the constructions without shear walls

Key Words: Shear wall, ResponseSpectrum,SeismicAnalysis, Storey Drift

1. INTRODUCTION

Earthquakeisanaturalterriblecalamitythatresultsfroma rapid release of energy beneath the earth's surface. It is considered one of the greatest natural disasters since it causesaportionoftheearth'ssurfacetoshakeup,aswellas allmanufactureditems,livingandnon livingcreaturesonit. The vibrations are caused by the energy emitted and are caused by internal and external substances within the surface, resulting in loss of life and structural damage. Earthquakes can have a wide range of intensities and magnitudes,soit'scriticaltolookintotheseismicbehaviour of RC structures for various functions such as base shear, displacements, and so on. A dynamic analysis should be carried out to figure out the maximal reaction to a base excitationinordertomakeastructuresafeandresearchits natureduringearthquakes.Whenastructureissubjectedto quake shaking, shear walls are created to counteract the consequencesoflateralloadsandtoprovidetheappropriate strengthandstiffness. Whencomparedtoall otherlateral

forceresistingmethods,shearwallsarethemosteffective, especiallyfortallbuildingsandliftsituations

2. WHAT EXACTLY IS SHEAR WALL?

Shearwalls,whichcanbecreatedasverticallyorientedwide beamsinareinforcedconcreteframedstructure,areusedto mitigatetheeffectsoflateralloadsoperatingonbuildings. Thesearegiveninadditiontoslabs,beams,andcolumnsina structure,andtheyprovidetherequiredrigidity,particularly in residential constructions, and they serve as a case in a structure. Shear walls have been widely used in mid and high risestructuresduringthepasttwodecades.Shearwalls areextremelysignificantinbuildings,particularlytallones, becausetheyareparticularlyvulnerabletolateralloadsand seismicpressures

3. OBJECTIVE OF THE STUDY

1.To examine the behaviour of multi story buildings with and without shear walls, as well as the results for the seismiczone4analysis.

2.To determine the shear wall's position so that it can efficientlyresistlateralloads.

3. By performing dynamic analysis, the structure was analysed in terms of base shear, displacements, drifts, storey stiffness, and storey forces, by modifying the stiffness of the structure along its height in different seismiczonesofIndia

4. METHODOLOGY AND PARAMETERS

Theflowchartexplainsthefull approach.Inthisresearch paper,RegularshapeStructureisconsideredandisshownin figure1withshearwallandwithoutShearwall.TheG+15 high rise building, with a length of 46.1 m, is used in this analysis.G+15storieswithtypicalstoreyheightof3mwith bottomheightof4.1m.FixedtypeofSupportconditionsofa specifictypearetakenintoaccount

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p ISSN: 2395 0072

Fig 1: Methodology

Table 1: DetailsandDimensionsofMultistoreyBuilding Model

Title Specification

BeamSize 300*500mm

ColumnSize 600*600mm

SlabThickness 150mm

ThicknessofShearWall 200mm

ConcreteGrade M30

SteelAndRebar HYSD415

FloortoFloorHeight 3m

Table -2: LoadCalculation:

Type of Load Calculation

WallLoad 6.8kN/m LiveLoad 5kN/m

SeismicLoad ASperIS1893:2016

Fig 3: Plan of Building With Shear wall

5. MODELLING:

Thefiguresbelowshowafloorplanandathree dimensional imageofa building.ETABS softwareisusedto model and analysethecompletestructure.Allmodelsareanalysedfor gravity loads and lateral loads (Seismic and Wind) with variousloadcombinations.Boththegravityandlateralloads arecalculatedinaccordancewithIndianstandards.Defining ofproperty:ThematerialAttributewasfirstdefined.Wecan add additional materials to our structural components by assigningthenecessarydetailsindefining(beams,Columns, and slabs.) After the Defining of all the property now we havetoassignthepropertystepbystep

Fig 4: Floor Plan & 3D Building View

Fig-2: Plan of Building Without Shear wall

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p ISSN: 2395 0072

Fig 5: Floor Plan & 3D Building

6. Analysis And Design Check:

Theconstraintsaredrawnandshowninthefollowingfigures after analysing all structures in the ETABS. The load combinations are selected from all the load combinations analysed are 1.2(DL + LL + EQX) , 1.2(DL + LL + EQY), 1.2(DL+LL+WLX),and1.2(DL+LL+WLY).

Fig 7: Building without Shear wall

7. Result and Discussions:

InthispaperbuildinghavingshearwallandwithoutShear wallareanalaysiswithhelpofETABsSoftware.Allthemodel areanalysisintheseismiczone4.Byusingtheanalysisresult variousgraphsareplottedandcomparewiththedifferent parameters. Following results are drwan in this paper . Storey Drift,StoryForces,StoreyStiffness

7.1 Story Drift:

InthisgraphShowsthecompressionbetweenthebuilding havingshearwallandwithoutshearwallinEathquakeinX Direction.InthepaperWSWstandsforWithshearwalland WOSWstandsforwithoutShearwall.

Belowtheshowsthevariationofstoreydriftwithstoreyno. inEarthquakeinX&Ydirectionforthebuildinghavingshear wallandwithoutshearwall

Fig 6: Building with Shear wall

Fig 8: Storey Drift for EQ in X Direction

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

Fig 9: Storey Drift For EQ In Y Direction

Fig-10: Response Spectrum In X Direction

Fig 12: Storey Stiffness in X direction

Fig 11: Response Spectrum In Y Direction

7.4 Stiffness:

The lateral force causing unit translational lateral deformationinthatstoreyisestimatedasthestoreystiffness, with the bottom of the storey prevented from moving laterally,i.e.,onlytranslationalmotionofthebottomofthe storeyisconstrainedwhileitisfreetorotate.ASshowninthe graphs Storey Stiffness between the building having shear wall (WSW) and without shear wall (WOSW) in X and Y Direction.Graphsshowsthevariationbetweenthem.

Fig-13: Storey Stiffness in Y Direction

7.5 Storey Shear:

AsthegraphsshowsbelowthatthestoreyShearismaximum atthefirststoreyandminimumatthetopofthebuildingin bothbuildinghavinghavingshearwallandwithouttheshear wallwhichispermissibleunderIScode

Fig 14: Storey Shear in X Direction

Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p ISSN: 2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal

International Research Journal of Engineering and Technology (IRJET) e ISSN: 2395 0056

[6] HahzadJamilSardarandUmesh.N.Karadi,”Effectof change in shear wall location on storey drift of multistory building subjected to lateral loads”, InternationalJoInnovativeResearchinScience,ISSN: 2319 8753,Vol.2,September2013,pp4241 4249J. Ruiz García, “Issues on the Response of Existing Buildings Under Mainshock Aftershock Seismic Sequences.”

Fig-15: Storey Shear in Y Direction

8. Conclusion:

 Two differentbuildingsareconsideredwithshearwall and without shear wall shapes evaluated for study in ETABS,bythemethodofResponseSpectrumnamelyI shaped, shearwallareusedinbuilding.

 There has beena decrease in lateral displacement and storey drift for the two distinct types of buildings investigated, i.e. G+15.structures with shear walls vs. regular buildingsShear walls are not embedded in RC structures.

 Theparameterstoreystiffnesshasasignificantimpacton earthquakeincidence,anditisshowntobegreaterfor G+15 storey buildings with an I shaped shear wall. In comparedtostructureswithoutshearwalls, shearwall performsbetter.

 Winddoesnotdominatetheanalysisinzone4andhas noeffectontheresults,indicatingthatwindplaysnorole inthebuildinganalysisinzone4.

REFERENCES

[1] IS13920,"CodeofPracticeforDuctileDetailingof ReinforcedConcreteStructuresSubjectedtoSeismic Forces,"waspublishedin1993.

[2] Buildingloadingstandards:IS875(part1 5) codeof practiseforstructuralsafety

[3] RichaGupta,Alfiabano“PerformanceEvaluationof Various Shapes of Shear Wall using Response SpectrumAnalysis.”2019

[4] Nikhil Pandey “Stability Analysis Of Shear Wall At DifferentLocationsInMulti StoreyedGeometrically IrregularBuildingUsingETABS”2021

[5] Karnati Vijetha, DR. B. Panduranga Rao “ComparativeStudyofShearwallandBracingfora Multistoriedstructureundersesmicloading.”

Volume: 09 Issue: 08 | Aug 2022 www.irjet.net p ISSN: 2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal