ABSOLUTE ACCELERATION TRANSFER FUNCTION OF SECONDARY SYSTEMS SUBJECTED TO MULTI-COMPONENT EARTHQUAKES

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GHAFOURI ASHTIANI M.; FOYOUZ A.R.

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Journal: ESTEGHLAL Year:2002 | Volume:21 | Issue:1 Page(s): 113-139

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Title

ABSOLUTE ACCELERATION TRANSFER FUNCTION OF SECONDARY SYSTEMS SUBJECTED TO MULTI-COMPONENT EARTHQUAKES

Author(s)

GHAFOURI ASHTIANI M. | FOYOUZ A.R. | Issue Writer Certificate

Keywords

TRANSFER FUNCTIONQ3

RANDOM VIBRATIONQ4

SECONDARY SYSTEMSQ4

CRITICAL ANGLEQ3

INTERACTIONQ3

NONPROPORTIONAL DAMPINGQ4

Abstract

The importance of the equipment and SECONDARY SYSTEMS in seismic design and performance evaluation is well recognized and has been the subject of many studies. In all of the estudies, earthquakes considered as a single component, and in most of them the primary system is considered as shear building. Most attention has been concentrated on the response of secondary systemand its response spectrum. In this paper, the TRANSFER FUNCTION for absolute acceleration of the secondary system is outlined The squared modulus of TRANSFER FUNCTION relates the power spectral density function of the input (excitation) to the output (response), which is useful in the study af the various dynamic parameters of the system. In addition to the TRANSFER FUNCTION, the autoco elation and power spectral density functions of absolute acceleration of the secondary system are obtained. Earthquake is considered as a multi-component system and the necessary formulation is developed for the calculation of these functions as well as the CRITICAL ANGLE with and without INTERACTION between the two systems. The damping of the system is considered as proportional in the decoupled analysis and nonproportianal in the coupled analysis. The formulation developed has been illustrated by considering a ten-story torsional building. Various parameters such as eccentricity, correlation between components, tuning INTERACTION and nonproportinal damping are studied. Results show that eliminating the effect of multicomponentness of earthquake can cause large errors especially at large eccentricities.

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APA: Copy

GHAFOURI ASHTIANI, M., & FOYOUZ, A.R.. (2002). ABSOLUTE ACCELERATION TRANSFER FUNCTION OF SECONDARY SYSTEMS SUBJECTED TO MULTI-COMPONENT EARTHQUAKES. ESTEGHLAL, 21(1), 113-139. SID. https://sid.ir/paper/6049/en

Vancouver: Copy

GHAFOURI ASHTIANI M., FOYOUZ A.R.. ABSOLUTE ACCELERATION TRANSFER FUNCTION OF SECONDARY SYSTEMS SUBJECTED TO MULTI-COMPONENT EARTHQUAKES. ESTEGHLAL[Internet]. 2002;21(1):113-139. Available from: https://sid.ir/paper/6049/en

IEEE: Copy

M. GHAFOURI ASHTIANI, and A.R. FOYOUZ, “ABSOLUTE ACCELERATION TRANSFER FUNCTION OF SECONDARY SYSTEMS SUBJECTED TO MULTI-COMPONENT EARTHQUAKES,” ESTEGHLAL, vol. 21, no. 1, pp. 113–139, 2002, [Online]. Available: https://sid.ir/paper/6049/en

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