EQ 5 May 14 Nakhorn (1)

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Faculty of EngineeringThammasat University

VibrationModesofMultiStoryBuilding


Mode1:Ydirection Mode1:Ydirection

RegularStructure(SymmetryinVerticalandPlan)Faculty of EngineeringThammasat University

VibrationModesofMultiStoryBuildingMode1:Xdirection Mode1:Torsion

RegularStructure(SymmetryinVerticalandPlan)


VibrationModesofMultiStoryBuildingMode1:Ydirection Mode1:Ydirection(Plan)

IrregularStructure(Unsymmetric Plan)Faculty of EngineeringThammasat University

VibrationModesofMultiStoryBuildingMode1:Xdirection

IrregularStructure(Unsymmetric Plan)


VibrationModesofMultiStoryBuildingMode1:Ydirection Mode1:Ydirection

IrregularStructure(VerticalIrregularity) (Soft story) Faculty of EngineeringThammasat University

FacultyofEngineeringThammasatUniversity

(Soft story)






(Teresa Guevara and Luis Enrique Garca 2005)

Short Column Effects (Soft story)





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FacultyofEngineeringThammasatUniversity Faculty of Engineering

Thammasat University

VibrationShaker:Concept

2mRF frequencyCircular

RadiusMass

Rm


VibrationShaker:Concept2Massesaremovingatthesameratebutoppositedirection

PlanView

VibrationShaker:Concept

UniAxialHarmonicForcecanbegenerated!

VibrationShaker:


VibrationShaker:


VibrationShaker: Example:2storyRCbuildingPathumthani




Mode Shape at Excite Y: (3.833Hz)

Plan ElevationFaculty of EngineeringThammasat University

Y direction

0.97

1

0.060

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. Vs30 = 240 m/s

. Vs30 = 258 m/s

. Vs30 = 350 m/s

. Vs30 = 310 m/s

. Vs30 = 388 m/s

. Vs30 = 221 m/s

. Vs30 = 367 m/s

. Vs30 = 548 m/s



Documents

EQ 5 May 14 Nakhorn (1)