WITH DIFFERENT GEOMETRY
MOHD HUZAIFA YAMAN
SHAIK IMTIYAZ ALI
NSAKCET, India
NSAKCET, India
ABSTRACT:Inmanymetropolitancenterswithminimalseismicity,multifunctionalbuildingswithatransferstructurehave become popular construction. The reaction behavior of systems with a transfer plate, when subjected to earthquake ground shaking,isinvestigatedinthis research.Inthecontext ofdynamicrotational translational coupling, the impactsofload path discontinuity and transfer plate flexibility are investigated The seismic analysis of structural systems in tall buildings with diversestructuralforms(square,circle,equilateraltriangle,andpentagon)intheseismiczone(ii&v)withtransferslab was checkednumericallyinthisthesis.Thebuildingunderinvestigationisa35 storyreinforcedconcretemomentresistantframe constructedforgravityandseismicusefollowing1893:2016andanalyzedusingEtabs2019structuralanalysistools
1. INTRODUCTION
The transfer slab system is a reinforced concrete structure that makes building construction simpler, more aesthetically versatile,andcost effective.Iteliminatesbeams,allowingthebuilding'sheighttobedecreased.Thetransverserigidityispoor duetothelackofdeepbeams,causingnon structuralsectionswhenearthquakestressesareapplied(LandeandRaut,2015). Thetransverseslabisacolumn supportedreinforcedconcreteslabusedwhenmoreroomisrequired,suchasinatheatreor parkinggarage.Thisapproachismoreadaptablethanthetraditionalmethod;theTransferslabwithdropandheadisagreat way to reduce moment while using less slab thickness (Sawant, 2016). Because a floor system plays an essential role in the totalcostofthebuildingbyloweringthethicknessofeachstructuralfloor,apost tensionedfloorsystemwasdesignedtosave constructiontimeandcosts.
2 Literature Review
Osama O. El Mahdya, Hala M. Refatb (2022): The seismic performance of tall structures using transfer girders or slabs is investigated in this work. Vertical and lateral loads are often transferred from the top superstructure to the lower substructureusingthesetransfersystems.Thereactionspectrumandpushoveranalysisapproachexaminedtwocasestudies. ETABS computer software was used to conduct the analyses. Transfer girders or transfer slabs are used in the chosen case studies. Each study case has seismic reaction characteristics such as base shear, story shear distribution, bending moment distribution,topdisplacement,storydrift,timeperiod,andresponsemodificationfactor.
Muchate B. G. 1, Prof. Shaikh A. N.(2020): Atransferfloorisakindoffloorthatcanaccommodatebothvertical andlateral loadresisting systems. Aloadistransferred toa different beneath the system. The weight isdistributedfrom closelyspaced columns to long span columns on the transfer floor. This paper reported a seismic analysis of a multi story structure with a transferfloor.Thelinearresponsespectrumanalysiswasusedtoexaminevarioushigh risebuildingmodels.Themodelswere studiedusingtheETABS2018structuralprogramforbuildingresearch.Theinvestigatedmodelshaveatransfergirdersystem atdifferentfloorlevelsinahigh risestructure.Fouralternativetypesoften storybuildingswereanalyzedinthisarticle,each withatransfergirderatvariousfloorlevels,suchasthefirst,second,third,andfourthfloors
3 MODELLING PARAMETERS
Building
Storey
of
Modal Periodsareamongthe characteristicsthathaveyieldedfindings.
obtained.
International Research Journal of Engineering and Technology (IRJET) e ISSN:2395 0056 Volume:09Issue:04|Apr2022 www.irjet.net p ISSN:2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3319
ANALYSIS OF TRANSFER SLAB STRUCTURE
1 ,
2 1Assistant Professor, Department of Civil Engineering,
2 Student, Department of Civil Engineering,
***
displacement,
drifts,Baseshear,and
For35 storybuildings,theresults
thep deltaanalysiswere
Model1:ASquareStructure Model2:BuildinganEquilateralTriangle Model3:ACircularStructure Model4Apentagon shapedstructure.
International Research Journal of Engineering and Technology (IRJET) e ISSN:2395 0056 Volume:09Issue:04|Apr2022 www.irjet.net p ISSN:2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3320 Dimensions of Structural Members Fig No 1: Typical floor Plan 3D View
International Research Journal of Engineering and Technology (IRJET) e ISSN:2395 0056 Volume:09Issue:04|Apr2022 www.irjet.net p ISSN:2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3321 4. ANALYSIS RESULTS 0 5 10 15 20 25 30 35 40 45 0 10 20 30 40 Dis p lace m e n t (m m ) STORIES STORY DISPLACEMENT FOR ZONE 2 square triangle circle pentagon 0 10 20 30 40 50 0 10 20 30 40 Dis p lace m e n t (m m ) STORIES STORY DISPLACEMENT FOR ZONE 2 square triangle cicle pentagon 0 50 100 150 0 10 20 30 40 d is p lace m e n t (m m ) stories STORY DISPLACEMENT FOR ZONE 5 square triangle circle pentagon 0 50 100 150 200 0 10 20 30 40 d is p lace m e n t (m m ) stories STORY DISPLACEMENT FOR ZONE 5 square triangle cicle pentagon
pentagon pentagon square
pentagon pentagon square square triangle triangle
International Research Journal of Engineering and Technology (IRJET) e ISSN:2395 0056 Volume:09Issue:04|Apr2022 www.irjet.net p ISSN:2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3322 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0 5 10 15 20 25 30 35 40 d rif t stories story drift for zone 2
square triangle triangle circle cicle 0 0.0005 0.001 0.0015 0.002 0.0025 0 5 10 15 20 25 30 35 40 d rif t stories story drift for zone 5
1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 TIME PERIOD square triangle cicle pentagonpentagon 0 circl e triangl e squar e TIME PERIOD 123456789 1011 12 5 4 3 2 1 0
PERIOD square triangle cicle pentagon
International Research Journal of Engineering and Technology (IRJET) e ISSN:2395 0056 Volume:09Issue:04|Apr2022 www.irjet.net p ISSN:2395 0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3323 FigureComparisonofthetimeperiodforzonevwithandwithoutp delta 5 CONCLUSIONS Thewords"tallbuilding,""high risebuilding,"and"skyscraper"areallambiguouswhenitcomestoheightorthenumberof floors. No matter that they all relate to the same kind of building. The two aren't the same height, but there is a slight difference. Many factors influence the design of a high rise structure, including its aesthetics and utility and the needs of municipal planners. The enormous diversity of possible forms in building design and their different interactions with the surrounding buildingsmakeitdifficulttocomeupwithclearuniversalguidelinesforchoosing Forhigh riseconstructions, symmetrical formsareoftenchosen,howeverinthisinstance;triangularshapes wereshown tobemorerigidthanotherstructureswhenconsideringp delta. Incomparisontostaticanalysis,thestructure'sdisplacementisincreasedbythesecond orderimpactofpdeltaanalysis A second order moment is taken into account when determining the best form for a triangle for construction purposes basedonexaminingalldeflectionanddriftfindings. 0 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 TIME PERIOD square triangle circle pentagon 0 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 11 12 TIME
A
E.Q.
the
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form
it has a
thehighestvalueofbaseshearinthestudy.
toP Delta.
Drift is more prominent than it would be without P Delta. This is because story drifts are inside the code's boundaries
1893 2002Part 1).
in 20%
6. SCOPE FOR FURTHER STUDY
ToinvestigatethedynamicWindimpacts
analysis for 35 storeys. As a result, the P Delta
theinfluenceofdynamicfactorsontheseeffects.
soilinteractionsaffecttheseismicbehaviourofreinforcedconcreteframedbuildings.
laghasa considerableimpacton thestructural efficiencyofa highstructure; henceit's essential tounderstandthe influenceofshearlag.
Toinvestigatetheeffectofdynamicfactorsontallbuildingframesondynamicwindspeedanddirection.
Theimpactofatallbuilding'sgeometricplanlayoutmayalsobeexamined
(1) Kang Kun Lee1, Yew Chaye Loo2, and Hong Guan3, (2001) "Simple analysis of frame tube structures with multiple internal tubes"
(2) AmitUrs,(2002)"Stability analysis of frame tube tall building"
(3) Mir M. Aliand Kyoung Sun Moon, (2007) "Structural developments in tall buildings: current trends and future prospects"
(4) RezaRahgozarand Yasser Sharifi, (2009) "An approximate analysis of combined system of framed tube, shear core and belt truss in high rise buildings"
(5) B.DeanKumar1andB.L.P.Swami2 ,(2010) "Wind effects on tall building frames-influence of dynamic parameters"
(6) Reza Mahjoub1, Reza Rahgozar2, and Hamed Saffari3, (2011) "Simple analysis of tube frame system of tall building by using deformation functions"
(7) Reza Mahjoub1, Reza Rahgozar2, and Hamed Saffari3, ( 2011) "Simple method for analysis of tube frame by consideration of negative shear lag"
(8)K.Sevaliaa,Dr.AtulK.DesaibandDrSAVasanwalac,(2012) "Effect of geometric plan configuration of tall building on wind force coefficient using cfd"
(9)AbhayGuleria, Structural Analysis of a Multi Storeyed Building using ETABS for different Plan Configurations, InternationalJournalofEngineeringResearch&Technology(IJERT),3(5),May2014,PP1481 1487.
International Research Journal of Engineering and Technology (IRJET) e
Volume:09Issue:04|Apr2022 www.irjet.net p
© 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3324 For construction, A triangular structure has a shorter time period than a square or rectangular
because
greaterstiffnessandasmallermass,whichmeansthetimeperiodismorestraightforwardinatriangleconstruction
pentagon shapedstructure,followedbysquareandcirclestructures,yielded
Andthesquareand
triangleshapeshave
lowestvalue.Compared
The Story
(IS
P Delta analysis results
higher displacement than without P Delta
analysisforthedesignofstructuralcomponentsinR.C.constructionsiscritical
ontallbuildingframesand
Different
Shear
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Volume:09Issue:04|Apr2022 www.irjet.net
© 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page3325