AN ESTIMATION OF DAMPING RATIO FOR THE NUMERICAL STUDY OF IMPACT FORCES BETWEEN TWO ADJACENT CONCRETE BUILDINGS, SUBJECTED TO POUNDING

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Rui Carneiro de Barros (Author) FEUP; Khatami, SM (Author) Other

Conference proceedings International

Title: ICEM15: 15TH INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS

15th International Conference on Experimental Mechanics (ICEM)

Porto, PORTUGAL, JUL 22-27, 2012

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ISI Web of Knowledge - 0 Citations

Other information

Authenticus ID: P-005-K2H

Abstract (EN): This paper compares the results of impact forces between two dynamic structural models using different link elements, to study and assess the building pounding under seismic excitation. It is assumed that link elements are devised to calculate the impact forces for some analytical models of the contact between adjacent buildings, during time history loading. To calculate the impact forces, the link elements are assumed to have - besides a gap - spring with high stiffness and dashpot damper, located parallel with each other. In this study, different link elements developed or used by past researchers are modified to measure the impact force between two modelled structures; also a comparison of the results from the analyses is illustrated. For this investigation, determination of the impact forces is possible for the link models considered, whenever lateral displacement exceeds the gap. In order to solve the dynamic equations of motion, a numerical algorithm was suitably programmed by using MATLAB software. Finally, the results of the numerical investigations are represented graphically for comparison. It seems that the equations used need to be improved to better assess the impact forces and allow designing safer adjacent buildings. Here, an alternative equation of damping ratio is used and suggested to better calculate the impact force, in the context of the Kelvin-Voigt model; it has been shown that suggested equation can provide one of the best estimations of the impact force. Also an experimental model is presented for further comparison analysis with the numerical model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17