Application of the Yield Point Spectra (YPS) Method in Performance Design of Steel and Reinforced Concrete Frames

Ramin Tabatabaei,Mohammad Ershad Rahmanian

doi:10.5923/j.jce.20120204.02

Ramin Tabatabaei, Mohammad Ershad Rahmanian

Open Access

https://doi.org/10.5923/j.jce.20120204.02

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Abstract

application of the method of the Yield Point Spectra (YPS) for seismic design and evaluation of existing structures has been studied. The important thing about the Yield Point Spectra (YPS) is that this method can be used in structural profile such as strength and hardness efficiently, so that the ductility and inter-storey drift index (IDI) of the structures were limited to the amounts of the desired performance level. This method is considered as the functional capac- ity spectrum method and using algorithm of linear static analysis methods in the estimation of response of structures. Also, the graphics capabilities of present methods can express authorized areas of design that satisfy multiple objectives func- tional. In the present method, response of multi degree of freedom (MDOF) models using the equivalent single degree of freedom (SDOF) models and Yield Point Spectra (YPS) is estimated. In numerical studies of seismic design, some steel and reinforced concrete 2-D frames in 4 and 12 floors with the Yield Point Spectra (YPS) are selected. Then, the results of the yield point Spectra (YPS) are compared with the results of the linear static analysis and nonlinear time history dynamic analysis methods and shown the present method is efficient and sufficiently accurate.

Highlights

Most researchers have based their studies on pushover analysis for estimating seismic demands of multistorey system,[1, 2]
The use of the equivalent Single Degree of Freedom (SDOF) analogy plays a central role in the procedures that are presented for using Yield Point Spectra (YPS) in the design and approximate analysis of multistorey buildings[12]
The design methodology combines the use of Yield Point Spectra (YPS) with the equivalent single degree of freedom formulation, for the design of multistorey systems

Summary

Introduction

Most researchers have based their studies on pushover analysis for estimating seismic demands of multistorey system,[1, 2]. It is shown that YPS can be used to reliably determine combinations of lateral strength and stiffness that are effective to limit drift and displacement ductility demands to arbitrary values such as those required to achieve a desired performance. Yield Point Spectra can be used to estimate the peak displacement and the displacement ductility demands of structures responding to a given earthquake. The use of the equivalent Single Degree of Freedom (SDOF) analogy plays a central role in the procedures that are presented for using YPS in the design and approximate analysis of multistorey buildings[12]. YPS are used to obtain the minimum lateral strength required to limit peak roof displacement to arbitrary values for a design earthquake. A system displacement ductility limit of 2, the minimum acceptable yield strength coefficient (C y ) is approximately to 0.3

Relations and the Application Process of the Yield Point Spectra

Findings

Conclusions