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Dynamic test and seismic response analysis of testing cable-stayed bridge with CFRP cables(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年06期
Page:
47-53
Research Field:
Publishing date:
2009-12-20

Info

Title:
Dynamic test and seismic response analysis of testing cable-stayed bridge with CFRP cables
Author(s):
LIU Rong-gui1; ZHOU Shi-jin1; XU Fei1; CAI Dong-sheng1; LU Zhi-tao2
1.School of Science,Jiangsu University,Zhenjiang 212013,Jiangsu,China;2.School of Civil Engineering,Southeast University,Nanjing 210096,Jiangsu,China
Keywords:
bridge engineering;  cablestayed bridge;  CFRP cable;  dynamic test;  finite element analysis;  seismic response
PACS:
U448.27
DOI:
-
Abstract:
In order to obtain the differences between the testing results and the theoretical values of dynamic characteristics of the testing cablestayed bridge with CFRP(carbon fiber reinforced plastics) cables, and to compare dynamic characteristics and seismic response values of the cablestayed bridge with CFRP and steel cables, the pulsating method is used for the field modal test of the CFRP cablestayed experimental bridge, and the peak picking method and crosspower spectral density method are made joint use to identify its modal parameters, then these parameters are compared with the values of calculating by finite element model. And on the basis of axial stiffness equivalent principle, the CFRP cables of the experimental bridge are replaced with steel cables. Following that, the analysis of dynamic characteristics and seismic response is adopted to the models with different cables. The conclusions show that: the measured results of the testing bridge are close to the calculated values, their mode shapes match well, the maximum difference of their former three natural frequencies is only 7.9%; due to the enormous global stiffness of the testing bridge, the advantages of the cablestayed bridge with CFRP cables over that with steel cables are only partially embodied; the largest increase of the natural frequency is only 0.2%; under some seismic action, the axial force and the bending moment in the bottom of the tower are reduced 0.11% and 0.16%. 3 tabs, 9 figs, 12 refs.

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Last Update: 2009-12-20