Seismic Response Analysis of Continuous Girder Bridges Considering Orbital Constraints
In order to study the seismic response law of continuous girder bridge and track system of high-speed railway,an integrated model of line and bridge considering track constraints is established with continuous beams and T-beams of a high-speed railway as the research objects,and the seismic response of seamless lines of continuous girder bridges under consistent excitation is studied,the effects of longitudinal resistance,pier stiffness and support type on the seismic response of beam-rail system were discussed.The results show that the track constraint will increase the low-order longitudinal self-vibration frequency of the structure,which has less effect on the vertical and transverse frequencies of the structure;the orbit constraint has a greater impact on the internal force of the structure,and the shear force at the bottom of the pier is reduced by 27.56%;the position of the beam joint is the unfavorable position of the rail;the small resistance fastener has a significant effect on reducing the longitudinal force of the rail;the stiffness of the pier can significantly reduce the relative displacement of the beam rail;the friction swing isolation bearing can significantly reduce the bending moment of the bottom of the continuous beam fixed pier,and the friction swing damping isolation isolation bearing can be arranged only on the main pier from the economic point of view;The traveling wave effect has a greater impact on the track system,and at the same time has different degrees of influence on the bending moment of the pier bottom.
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万方数据
维普
