Design parametric analysis of MTC connection device
CHEN Shitong1,2, ZHANG Maojiang1,2, XU Xinxiang1,2, LI Ran1,3
1.State Key Lab of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.Hebei Provincial Engineering Innovation Center for Traffic Emergency and Guarantee, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
3.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract:In order to elucidate the mechanical performance of the MTC device and confirm its usual change rules under the influence of the related design parameters, the pseudo-static test was carried out and verified by finite element models for the mechanical properties. The method of orthogonal test design was utilized to analyze the significance of the design parameters. The changing laws of the initial stiffness under the impact of significant design parameters were analyzed. The results show that the finite element analysis results are consistent with the test connection stiffness after the adjustment considering the assembly clearance. The finite element model can reflect the actual variation of connection stiffness of the MTC devices. The significant order of the design parameters affecting the initial stiffness of the MTC device is the height, the thickness, the length of the short bottom edge, the length of the long bottom edge and the separation distance of the energy-consuming plates. The height, the thickness and the length of the short bottom edge are the significant parameters affecting the initial stiffness of the MTC device. The initial stiffness of the device can be adjusted by changing their values to achieve the ideal damping effect when the MTC devices are used in the seismic design of a continuous beam bridge.
Key words: MTC device; mechanical performance; initial stiffness; design parameters; orthogonal test; parameters analysis
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