The Response Characteristics of Approximate Nonlinear Methods with RC Dual System

이중골조에 대한 비선형 약산법들의 응답특성

  • 남영우 (동아대학교 건축공학과) ;
  • 강병두 (거창전문대학 건축.인테리어과) ;
  • 전대한 (동서대학교 건축공학부) ;
  • 김재웅 (동아대학교 건축학부)
  • Published : 2005.04.01

Abstract

In performance-based design methods, it is clear that the evaluation of the nonlinear response is required. The methods available to the design engineer today are nonlinear tim history analyses, or monotonic static nonlinear analyses, or equivalent static analyses with simulated inelastic influences. The nonlinear time analysis is the most accurate method in computing the nonlinear response of structures, but it is time-consuming and necessitate more efforts. Some codes proposed the capacity spectrum method based on the nonlinear static analysis to determine earthquake-induced demand given the structure pushover curve. This procedure is conceptually simple but iterative and time consuming with some errors. The nonlinear direct spectrum method is proposed and studied to evaluate nonlinear response of structures, without iterative computations, given by the structural linear vibration period and yield strength from the pushover analysis. The purpose of this paper is to compare the accuracy and the reliability of approximate nonlinear methods with respect to RC dual system and various earthquakes.

Keywords