THE SCALED NDP: A PRACTICAL PROCEDURE FOR OVERCOMING LIMITATIONS OF THE NONLINEAR STATIC PROCEDURE

摘要

Nonlinear Static Procedures have become widely accepted for use in seismic design and evaluation in recent years. While generally acceptable for peak displacement estimates, the accuracy of the NSP is poor for quantities that are significantly affected by higher modes. In recent work performed for the ATC-55 project, a new approach was identified for determining those quantities that are significantly affected by higher modes. The Scaled Nonlinear Dynamic Procedure (Scaled NDP) is described herein. The Scaled NDP is easily implemented in practice and requires little effort beyond a nonlinear static analysis. Suggestions are made for the use of the NSP and Scaled NDP in Performance-Based Earthquake Engineering.