动力非线性边界分析.ppt

* 本文来自:中国范文网【/】详细出处参考：/post/216.html 相关文章在网站其他栏目里面。 动力非线性边界分析 简介 Boundary Nonlinear Dynamic Analysis Damper type Nonlinear Link Modal Nonlinear Analysis : Equivalent Dynamic Load Base Isolator type Nonlinear Link Dynamic Nonlinear Analysis (2002. 9. 2.) Dynamic Nonlinear Analysis (2002. 9. 2.) Damper type Nonlinear Link Visco-Elastic Damper (VED) Solid Type Fluid Type Hysteretic System (HYS) Metal Damper Friction Damper Dynamic Nonlinear Analysis (2002. 9. 2.) Effectiveness of Damper Period Displacement Response Spectrum Period Shift Damping Damping Increase Energy Dissipation by Damper Viscosity or Damper Plastic Behavior Building Damage Reduction Visco-Elastic Damper (VED) Displacement Force Hysteretic System (HYS) Area = A1 Area = A0 Equivalent Damping Displacement Force Damper F Equivalent Damping by Damper Dynamic Nonlinear Analysis (2002. 9. 2.) Dynamic Nonlinear Analysis (2002. 9. 2.) cd kb dd db f f kd Damper Brace Visco-Elastic Damper (VED) Input Variables cd : VED Damping Constant kd : VED Stiffness S : Damping Exponent kb : Bracing Stiffness Dynamic Nonlinear Analysis (2002. 9. 2.) Damping Exponent (S) Linear (s=0.0) Nonlinear (0.0s1.0) Nonlinear (1.0s) Velocity of Deformation Viscous Damping Force Dynamic Nonlinear Analysis (2002. 9. 2.) Hysteretic System (HYS) f f d Input Variables k : Initial Stiffness Fy : Yield Strength r : Post Yield Strength Ratio α , β : Loop Shape Parameter S : Bi-linear Transition Parameter Deformation (d) Force ( f ) k r ·k Fy Dynamic Nonlinear Analysis (2002. 9. 2.) α=0.1 , β=0.9 α=0.9 , β=-0.1 α=0.5 , β=-0.5 α=0.25 , β=0.75 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1 d Deformation(d) Internal variable (z) -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -5 -4 -3 -2 -1 0 1 2 3 4 5 d z Deformation(d) Internal variable (z) -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -3 -2 -1 0 1 2 3 d Deformation(d) Internal variable (z) -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 -1 -0.