|Table of Contents|

Influence of Damping Characteristics on Seismic Responses of Composite Structures(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2007年02期
Page:
24-29
Research Field:
Publishing date:
2007-06-20

Info

Title:
Influence of Damping Characteristics on Seismic Responses of Composite Structures
Author(s):
LOU Meng-lin;  YONG Guo-zhu;  LI Jian-yuan
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
damping characteristic;  composite structure;  non-proportional damping;  seismic response;  relative error analysis
PACS:
TU352.1
DOI:
-
Abstract:
Firstly, according to the characteristics of composite structures, the seismic responses of composite structure with three models of equivalent modal damping ratio were respectively calculated under the excitation of harmonic waves. The influence of different equivalent modal damping ratio models on the seismic responses was discussed by comparing with the real seismic responses of composite structure with non-proportional damping model. Then, an estimating formula to evaluate equivalent modal damping ratio was derived according to the relative errors of the structural dynamic responses under resonant condition. Finally, the calculation precision of the equivalent modal damping ratio was proved by the dynamic responses of composite structure under the excitation of harmonic waves and real El Centro seismic waves.The results show that the equivalent modal damping ratio assumed at will is not reasonable and will lead to underestimate the seismic responses of composite structure and the method has high precision.

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Last Update: 2007-06-20