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This space is devoted to *PERFORM-3D*. Please visit the [Technical Knowledge Base|kb:Home] for documentation on topics common to all CSI Software.
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*PERFORM-3D* is a software useful for the performance assessment of structural systems. Stiffness and strength degradation during cyclic loading may be captured through [nonlinear material|kb:Material nonlinearity] modeling. PERFORM-3D has many more component-level modeling capabilities. Analysis capabilities capture [geometric nonlinearity|kb:Geometric nonlinearity] and display output animation-series according to useful enveloped limit-state relations. 

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*PERFORM-3D* users have control over force-deformation relationships. Strength-based and deformation-based demand-capacity measures are closely modeled and observed for inelastic elements. Elements designed to remain elastic throughout dynamic response simplify modeling and computation in that only their linear-elastic stiffness properties need be input. 

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*PERFORM-3D* is an ideal tool for [nonlinear|kb:Nonlinear] performance-based analysis and design, created by Dr. Graham H. Powell, University of California at Berkeley Professor Emeritus of Civil Engineering.