8B. ANALYSIS PART 2

CHAPTER 8B 'ANALYSIS' 4 integration of nonlinear differential equations of motion) is the most complete and realistic methodology for the analysis of structures. In the inelastic dynamic analysis the seismic action is introduced in the form of a history of base accelerations, either from actual recordings or from synthetic accelerograms. However, this analysis encounters problems in simulating the meteoric recurrent behaviour of the members of the structure, which is currently under scientific investigation and experimental verification. In addition, there is also the issue of appropriate selection of seismic accelerations, where the above analysis method is particularly sensitive. Therefore, the design engineer conducting the assessment or redesign study of an existing structure using inelastic dynamic analysis should have considerable critical ability and experience. Thus, combined with its increased computational complexity, and the fact that the required analysis time even with modern computers is particularly high, especially in spatial analyses of high-rise buildings (note that because the analysis is non-linear, the principle of superposition does not apply), inelastic dynamic analysis is not considered practical for general use. In contrast, the static inelastic analysis gives results that lie between the elastic methods and the inelastic dynamic method. It should be noted that, in the case where the externally applied load is horizontal seismic loads, the inelastic static analysis is also known as pushover analysis. Thus, although Pushover analysis does not have the accuracy of inelastic dynamics, since the seismic loads (which are dynamic) are considered approximately as static, it nevertheless leads to a significantly more accurate estimation of the response of the structure compared to elastic methods, and its application is much simpler than the corresponding inelastic dynamics. It should be noted that inelastic static analysis is not a new methodology. However, in recent decades, extensive research has led to the development of simulations that allow the behaviour of reinforced concrete structural members after their theoretical failure to be estimated with reasonable accuracy, with the aid of appropriate relationships (analytical or empirical) or tables. This is the reason why, in recent years, inelastic static analysis has been widely applied in the evaluation or redesign of existing buildings. • 3rd revision of 2022 EIA. The new version of SCADA Pro includes the changes provided in 3 h revision of 2022 EIS. Major interventions should be considered: α) In Chapter 2, the revision of the foreseen Assessment and Redesign Objectives in conjunction with the definition of the Seismic Class of structures, (b) In Chapter 3, the reported Data Reliability Levels and " In Absentia " representative material strength values, c) In Chap. 7, the addition of Annex 7F for the approximate assessment of the influence of reinforcement corrosion on the mechanical characteristics of structural elements; and d) In Chapter 8, the revision of paras. 8.2.1.5, para. 8.3.2.1 and para. 8.5.3.