Seismic Analysis of High Rise Building Using Outriggers and Belt- Truss System

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

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN: 2395-0072

Seismic Analysis of High Rise Building Using Outriggers and Belt- Truss System

1 Student, Civil Engineering Department, P.V.P.I.T. Budhgaon , Sangli , Maharashtra India

2 Professor, Civil Engineering Department, P.V.P.I.T. Budhgaon , Sangli, Maharashtra India ***

Abstract –

Tall building development has been hastily growing international introducing new demanding situations that want to be met thru engineeringjudgment.Incutting-edge tall buildings, lateral loads induced by wind or earthquake are regularly resisted with the aid of using a machine of coupled shear walls. But while the constructing will increase in height, the stiffness of the shape will become extra crucial and creation of outrigger beams among the shear walls and outside columns is regularly used to offer enough lateral stiffness to the structure. A variety of various techniques has been hired to pick out the premier places of those outrigger beams under wind load. However, there may be a scarcity of clinical studies or case researchcopingwithpremieroutrigger region beneathneathearthquakehundreds.Thishavealookat objectives to pick out the premier outrigger region in tall homes beneathneath earthquake hundreds. A 25 storey constructing changed into investigated and 3 extraordinary top floor acceleration to top floor speed ratios in every class of earthquake data have been included on this studies have a look at to offer a constant stage of approach. Response spectrum evaluation changed into performed and the behaviour of the constructing changed into decided thinking about reaction parameters along with lateral displacement and inter storey drift.

1. INTRODUCTION

In standard the edifice of large constructing is developing swiftly across the world, elevating new problems that require being deal with the use of a variety of architectural/structural engineering techniques. The related shear wall structures withstand the lateral seismic hundreds of cutting-edge skyscrapers. However, because the peak of the constructing increases, the tension of the shape will become extra and further important. In common, earthquakes be capable of occur everywhere withinside the world, apart from due to the fact greater human beings stay in skyscrapers,unique interest have to be paid to the dangers related to skyscrapers, mainly beneathneath extreme seismic pressure. When with a outrigger structuraldevice inahigh-upwardthrustedifice, the cantilever should be positioned withinside the excellent in all likelihood vicinity to create the shape stronger. The outrigger is the bounds that join the outside help to the primary middle partition of the skyscraper and gets lateral forces past the primary shape. Most ships use wood outriggers to counter the

wind pressure of the sails. The middle of a tall shape may be likened to a deliver's mast, with outriggers performing as spreaders & outer pillars performing as deliver envelopes.The help enterprise can take in the lateralforcesresultingfromthe earthquake & switch the burden to the inspiration through outside supports. Outriggertrusses in wall frames are one of the maximum green and cost-powerfulsystemsinskyscrapers, with outer columns regarding the outer finishing as a bottom. Cantilever beams (outriggers) are used to govern the overturning second of the middle and switch the instant from the middle to the outer column via way ofmeansofconnecting the two. When a horizontal load is carried out to the shape, the partitions and cantilever trusses rotate, inflicting compression at the leeward columns and anxiety at the leeward columns. The cantilever brace is placed at the outer circumference and is hooked up to the inspiration throughthe outer help and is known as a belt trusses. The outriggerbraces related among the centre & the outer column acts as a inflexible beam that falls beneathneath the transferringofthe lateral load. The belt binder connects the outer peripheral column of the shape and affords a superb deal large circumference to set the aspect deflection of the layout deduction. This inexperienced structural form connects persuasive facilities and growth conflict to the outward column. The primary locatedprimarytargetedoneveryaspect and middle extending at the aspect of the configuration is detected.

2. METHODOLOGY

Thischapterdealswiththelineofactionofprojectstudyi.e. themethodologyneedtocontributetotheachievementof desired goals of it. These methodologies basically have number of steps or set of procedures discussed in this section.

The section sizes were decided first then the material properties were found out. In this section, methods of analysis and details of model are described. This study is carried out to nvestigate the effect of outrigger structural system on response of high-rise steel building under the seismicforcesmodelingisdoneusingETABSsoftware.

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

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN: 2395-0072

2.1 MODELLING AND ANALYSIS

2.1.1 Input Data of Building: 

TypeofStructure-High-rise G+25storybuilding 

Outrigger bracing system- X-type , V-type and V InvertedV-type 

Bracingsection–Lsection 

Sizeofbeam-ISWB300 

Sizeofcolumn-ISWB600  Floorheight-3m

2.1.2

Material properties:

Thebasicmaterialpropertiesusedareasfollows: 

Yieldstrengthofsteel–250N/mm2mildsteel

ModulusofelasticityofsteelEs–200

2.1.3

Details of model:

Typeofframe Ordinarybracedframe

Buildingplandimensions 30x30m

BaysinX-andY-direction 5baysof6meach No.offloors G+25

Seismiczone IV

Seismiczonefactor 0.24 Soiltype Medium Importancefactor 1.2

Responsereductionfactor 5 Heightoffloor 3m

Slabthickness 200mm

Typeofoutriggerbrace Lsection

ThicknessofLsection 10mm Sizeofbrace 110x110mm

FIG-1ModelwithV-Invertedtypebracedoutriggers located

3. RESULTS AND

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

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN: 2395-0072

2. FromanalysisoftheG+25storeybuildingprovidedwith the outrigger and belt truss systems using X, V, and V Invertedtypebracing,itisobservedthatXtypebracings aremoreeffectivethanVandVInvertedtypebracings as are giving minimum displacement and drift values alsogivesmaximumstiffness.

3. In the analysis of the G+25 storey building, provided with outrigger and belt truss system with X type bracings,thelateraldisplacementandmaximumstorey driftgetsreducedby49.76%and46.91%respectively and stiffness increases by 295.04% compared to the valuesobtainedfromtheanalysisofconventionalframe typebuilding.

Fig3GraphDriftinmmvsCategory

4. Butaswecomparetheresultofalltypeofbracingand belttruss,VInvertedisconvenientthantheXbracing andbelttruss,becausethevalueoflateraldisplacement, storydriftobtainedbyVInvertedbracingandbelttruss is49.64%and46.81%andstiffnessis284.66%whichis similartotheXbracingandbelttruss

5. As X bracing has more connection between them as comparedtoVInvertedbracing,eventheXbracingis onlyconnectedtothecolumnbutVInvertedbracingis connectedtocolumnandbeamsothatbeamget’sthe supported.

6. Theeffectivenumbersofoutriggersandbelttrussinthe structureforsafetywereobservedas3,5.

Fig.4GraphModelvsBaseshearinKN

REFERENCES

[1] SameerChambulwar,TejasSkadam2021“Comparative Study of RCC Frame Structure with and Without OutriggerSystem”InternationalJournalofResearchin EngineeringandScience”2021

[2] B.G.Kavyashree,ShantharamPatil&VidyaS.Rao2021 “EvolutionofOutriggerStructuralSystem:AState-ofThe Art Review” Arabian Journal of Science and Engineering.2021

[3] Pankaj Sharma and Gurpreet Singh 2018 “Dynamic Analysis Of Outrigger System In High Rise Building AgainstLateralLoading”InternationalJournalofCivil EngineeringandTechnology2018

3. CONCLUSIONS

FromtheseismicanalysisofG+25storeysbuildingprovided with outrigger and belt truss structural system, following conclusionscanbedrawn:

1. The seismic behavior of G+25 storey building with outrigger and belt truss system shows reduction in responsessuchaslateraldisplacement,storeydrift,base shear.

[4] Dilrukshie I. Samarakkody 2017 “Outrigger-Belt And Frame Interaction In Composite Tall Building Under DifferentialAxialShortening.”AmericanSocietyOfCivil Engineers2017

[5] ErrolDsouzaAndDilapkmarU“AStudyOnOutrigger SystemInSeismicResponseOfTallStructuresByNonLinear Analysis” International Journal Of Innovative ResearchInScience,EngineeringAndTechnology2017

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

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN: 2395-0072

[6] ChetanPatelY.G.&KiranKuldeepK.N.2017“TheStudy On Behaviour Of Outriggers For Tall Buildings Subjected To Lateral Load” International Research JournalOfEngineeringAndTechnology.

[7] Goman W. M. Ho 2016 “The Evolution Of Outrigger SystemInTallBuildings.”InternationalJournalOfHigh RiseBuildings

[8] DennisC.K.Poon&Ling-EnHsiao2012“Performance BasedSeismicEvaluationOfWuhanCentre”American SocietyOfCivilEngineers2012

[9] Abbashaghollahi,MohsenB.FerdousAndMehdiKasiri 2012“OptimizationOfOutriggerLocationInSteelTall Buildings Subjected To Earthquake Loads.” World ConferenceOfEarthquakeEngineering2012

[10] Willford And R. J. Smith 2008 “Performance Based Seismic And Wind Engineering For 60 Story Twin Towers In Manila.” World Conference Of Earthquake Engineering2017.

[11] N. Hearth, N Haritos, T Ngo And P. Mendis 2009 “BehaviourOfOutriggerBeamsInHighRiseBuildings Under Earthquake Loads.” Australian Earthquake EngineeringSociety2009Conference.

[12] JianguoNieAndRanDing2013“ExperimentalResearch OnSeismicPerformanceOfKStyleSteelOutriggerTruss ToConcreteCovreTubeWallJoints.”AmericanSociety OfCivilEngineers2013

BIOGRAPHIES

RushikeshShinde Student, Civil Engineering Department,P.V.P.I.T. Budhgaon, Sangli,MaharashtraIndia

Prof.N.P.Phadtare Professor, Civil Engineering Department, P.V.P.I.T. Budhgaon , Sangli,MaharashtraIndia

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