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Contents ABOUT THE USER’S MANUAL.......................................................................................................1 WELCOME TO NONLIN ........................................................................................................................2 WHAT IS NONLIN? .......................................................................................................................................................2 PROGRAM DESIGN AND CONCEPTS.................................................................................................................................2 SYSTEM REQUIREMENTS ................................................................................................................................................3 INSTALLING NONLIN USING THE SETUP UTILITY .......................................................................................................3 PART ONE: NONLIN SDOF Systems - Program Data Input DESCRIPTION OF THE USER INTERFACE ....................................................................................................6 THE MENU ITEMS ......................................................................................................................................................7 THE BUTTON BAR ...................................................................................................................................................13 Structure Restore Button ....................................................................................................................................13 NO GO/GO Analysis Buttons............................................................................................................................13 View Computed Time Histories Button.............................................................................................................13 View Computed Hysteresis Plots Button ...........................................................................................................14 View Computed Energy Plots Button ................................................................................................................14 Review Summary of Computed Results Button.................................................................................................14 Animate Button ..................................................................................................................................................14 Response Spectrum Plot Button.........................................................................................................................15 Displacement Ductility Spectra Plot Button ......................................................................................................15 ENTERING STRUCTURAL PROPERTIES......................................................................................................16 THE UNIT TYPE, LENGTH UNITS AND FORCE UNITS FRAMES .................................................................................16 THE CONSTITUTIVE PROPERTIES FRAME .................................................................................................................16 Structural Mass/Weight/Period Button ..............................................................................................................17 Structural Damping Button ................................................................................................................................17 Structural Stiffness K0 Button ............................................................................................................................18 Structural Strain Hardening Stiffness K2 Button................................................................................................19 P-Delta Stiffness KG Button..............................................................................................................................19 Yield Strength Fy Button....................................................................................................................................21 Linear/Nonlinear Analysis Options....................................................................................................................21 DYNAMIC PROPERTIES OUTPUT FRAME ..................................................................................................................22 SUMMARY OF LATEST RUN OUTPUT FRAME ...........................................................................................................22 DYNAMIC FORCE APPLIED AS... INPUT FRAME ........................................................................................................23 Defining a Ground Acceleration ........................................................................................................................23 Displaying Ground Acceleration Plots...............................................................................................................26 Generating and Displaying Response Spectrum Plots .......................................................................................27 Generating and Displaying Demand Spectrum Plots .........................................................................................29 Code Spectra Plots .............................................................................................................................................30 Generating and Displaying Fourier Amplitude Spectrum Plots.........................................................................31 Defining a Wave Forcing Function....................................................................................................................34 Displaying Wave Generator Plots ......................................................................................................................36 Free Vibration ....................................................................................................................................................36 PART TWO: NONLIN SDOF Systems - Program Results Output PROGRAM EXECUTION RESULTS ................................................................................................................39 RUNNING THE ANALYSIS .........................................................................................................................................39
