LI Jingbo,CUI Chunyi,XU Minze,et al.Parameter Sensitivity Analysis of Seismic Response of a Continuous Rigid Frame Bridge based on Grey Correlation Method[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(04):805-811.
LI Jingbo,CUI Chunyi,XU Minze,et al.Parameter Sensitivity Analysis of Seismic Response of a Continuous Rigid Frame Bridge based on Grey Correlation Method[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(04):805-811. DOI: 10.13409/j.cnki.jdpme.20201125001.
Parameter Sensitivity Analysis of Seismic Response of a Continuous Rigid Frame Bridge based on Grey Correlation Method
In order to further study the seismic response law of continuous rigid frame bridge, the numerical calculation models of continuous rigid frame bridge under different working conditions are established. To fully consider the negative correlation factors, the longitudinal bending moment at pier top and pier bottom and the transverse bending moment at pier bottom and middle span are selected as seismic response indexes to carry out parameter sensitivity analysis based on the fiducial error analysis method and modified T's grey correlation analysis method. The computational results show that the longitudinal bending moment at the high pier top is more sensitive to the power curve of beam bottom, while the longitudinal bending moment at the low pier top is more sensitive to the high-span ratio at root of the beam, and the longitudinal bending moment at the pier bottom is more sensitive to the pier height ratio. Besides, the transverse bending moment at the high pier bottom is more sensitive to the high-span ratio of the beam at the middle span, while the transverse bending moment of the low pier bottom is more sensitive to the high-span ratio at root of the beam, and the transverse bending moment at midspan of the girder is more sensitive to the high-span ratio of midspan beam. The presented procedure of sensitivity analysis method can provide reference for seismic design of continuous rigid-frame bridges as well as disaster prevention and mitigation.
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