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| A study on additional effective damping ratio of viscous dampers from time-uistory analysis |
| WU Xu1,ZHOU Meirong1,CHEN Xi2,ZHANG Xuemei1 |
1.Institute of Civil Engineering,Nantong Institute of Technology,Nantong 226000,China;
2.Shanghai Unit Construction Engineering Consulting Co.,Ltd.,Shanghai 201908,China |
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Abstract To investigate additional effective damping ratio contributed by viscous dampers in structures during time-history analysis,by focusing on the work done by damping forces (damping energy),the paper established a relation between damping energy and equivalent damping ratio in time-history analysis,put forward theoretical formula of additional effective damping ratio,created finite element analysis models to testify the formula,and compared damping energies of the energy dissipation structure and an equivalent structure.The results show that the formula of equivalent damping ratio is more versatile and reasonable than other current formulae.It is applicable for calculating additional effective damping ratio of a energy dissipation structure in any time-history load case,and make energy dissipation structure and equivalent structure to have equal damping energy.
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Published: 15 February 2019
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