Base Share Calculation
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Consultant: JV of GOEC and DK Consult (P.) Ltd., Minbhawan, Kathmandu Client: Department of Education, Sanothimi, Bhaktapur District: VDC/Munacipality: Ward No.: Tol/Village Name of School: Digambarpur Secondary School, Dhanusha Building Description Building Type: School Building Use of Building Class room Number of Storey 1 Storey Height 3 m Total height of Building, H 3 m Wall material Wall thickness 0.4 m Floor/Roof type Equivalent thickness of floor/roof 0.15 m Spacing of timber beam 2 m Parapet wall height 0 m Building Plan Dimension 15 mX 7.45 m Nearest City having known zone factor (Ref. NBC 105) Zone factor 0.89 Importance Factor 1.5 School Building Type of floor diaphragm Flexible Type of roof diaphragm Flexible Design Load and Unit Weight of Material Dead Loads Brick in cement mortar 19 kN/m 3 Unit Weight of floor/Roof 20 kN/m 3 for Brick concrete over timber beam Weight of wall per meter run 7.6 kN/m 2 Live Load Floor Live Load 3 kN/m 2 Roof Live Load 1.5 kN/m 2 Seismic Weights Roof Area (m 2 ) Load (kN) Dead 111.75 335.25 Area Calculated from AutoCAD Live load 167.625 Note: 25 % of this load used to calculate total seismic weight Wall X1 18.55 70.49 Wall X2 16.65 63.27 Wall X3 18.55 70.49 Wall Y1 15 57 Wall Y2 32.28 122.664 Wall Y3 40.68 154.584 Total Seismic Weight of the building = 915.65 kN Brick in cement mortar Concrete over timber beam Janakpur Seismic evaluation and Strengthening of Masonry Building
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Base Shear
Transcript of Base Share Calculation
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Consultant: JVofGOECandDKConsult(P.)Ltd.,Minbhawan,KathmanduClient: DepartmentofEducation,Sanothimi,BhaktapurDistrict: VDC/Munacipality: WardNo.:Tol/VillageNameofSchool: DigambarpurSecondarySchool,Dhanusha
BuildingDescriptionBuildingType: SchoolBuildingUseofBuilding ClassroomNumberofStorey 1StoreyHeight 3 mTotalheightofBuilding,H 3 mWallmaterialWallthickness 0.4 mFloor/RooftypeEquivalentthicknessoffloor/roof 0.15 mSpacingoftimberbeam 2 mParapetwallheight 0 mBuildingPlanDimension 15 mX 7.45 mNearestCityhavingknownzonefactor (Ref.NBC105)Zonefactor 0.89ImportanceFactor 1.5 SchoolBuildingTypeoffloordiaphragm FlexibleTypeofroofdiaphragm FlexibleDesignLoadandUnitWeightofMaterialDeadLoadsBrickincementmortar 19 kN/m3UnitWeightoffloor/Roof 20 kN/m3 forBrickconcreteovertimberbeamWeightofwallpermeterrun 7.6 kN/m2LiveLoadFloorLiveLoad 3 kN/m2RoofLiveLoad 1.5 kN/m2
SeismicWeightsRoof
Area(m2) Load(kN)Dead 111.75 335.25 AreaCalculatedfromAutoCADLiveload 167.625 Note:25%ofthisloadusedtocalculatetotalseismicweightWallX1 18.55 70.49WallX2 16.65 63.27WallX3 18.55 70.49WallY1 15 57WallY2 32.28 122.664WallY3 40.68 154.584
TotalSeismicWeightofthebuilding= 915.65 kN
Brickincementmortar
Concreteovertimberbeam
Janakpur
SeismicevaluationandStrengtheningofMasonryBuilding
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CalculationofHorizointalSeismicCoefficientasperNBC105:1994DesignHorizontalSeismicCoefficient, Z= 0.89Where, I= 1.5
C= basicseismiccoefficientfortheseismiccoefficientmethod K= 4Z= seismiczoningfactorI= importancefactorforthebuildingK= structuralperformancefactorappropriatefotheparticularstructuraltype
Periodofvibration:
Equation7.4,NBC105:1994
Forlongdirection, TL= 0.018 s C= 0.08 ford=15mForshortdirection, TS= 0.036 s C= 0.08 ford=7.45mCdL= 0.427 ford=15mCdS= 0.427 ford=7.45mCalculationofHorizointalSeismicCoefficientasperIS1893:2002SeismicZone V Zonefactor,Z 0.36Importancefactor,I 1.5 R= 1.5Typeofsoil MediumTimeperiod,Forlongdirection, TL= 0.018 s Sa/g= 2.5 ford=15mForshortdirection, TS= 0.036 s Sa/g= 2.5 ford=7.45m
AhL= 0.45DesignHorizontalSeismicCoefficient, AhS= 0.45Where, Z= Zonefactor Ref.Table2,IS1893:2002
I= Importancefactor Ref.Table6,IS1893:2002R= Responsereductionfactor Ref.Table7,IS1893:2002Sa/g= Averageresponseaccelerationcoefficient
Recommandedhorizontalseismiccoefficient= 0.450
StoreyshearsatdifferentstoriesofthebuildingBaseShear=AhxSeismicWeight= 412.04 kNStorey
TotalWi(kN) Hi(m) Wihi2 Qi(kN)
StoreyShear(kN)
Roof 915.65 3 8240.89 412.04 412.04Sum 915.65 8240.89 412.04
ShearstressinShearwallsRef.IITKGSDMAGuidelinesforSeismicEvaluationandStrengtheningofBuildings,6.5.1
Averageshearstressinwalls,
Where, Vj= StoreyshearAw= Areaofshearwallinthedirectionofloading
=CZIK
0.09
2
