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

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