Research On Seismic Robustness Of Cable-stayed Tube Bridge Structure Based On MSMA-piezoelectric Composite Damping System

The transportation engineering of oil and natural gas is nation’s lifeline.When the structural span is large,oil and natural gas pipeline installation is mainly based on cable-crossing structures.Among them,cable-stayed pipe bridges are widely used.The seismic theory and application methods of transportation cable-stayed bridge structures still need to consider the coupling effect of seismic response between oil and gas pipelines and cable-stayed pipe bridges,making it challenging to meet the seismic design requirements of cable-stayed pipe bridge structures.Further research is needed on the seismic response coupling mechanism and seismic control theory of the oil and gas pipeline cable-stayed bridge structure.This article first studied the physical and mechanical properties of MSMA and piezoelectric materials,analyzed the technical parameters of developing an MSMA-piezoelectric composite damping device system using these two materials,and studied the mechanism of MSMApiezoelectric composite damping.Taking the cable-stayed pipe bridge structure in a typical project as the research object,the finite element calculation model of the oil and gas pipeline cable-stayed pipe bridge structure was established,and the seismic response was calculated and analyzed.The seismic reduction simulation of the oil and gas pipeline cable-stayed pipe bridge finite element calculation model structure with MSMA-piezoelectric composite damping device was carried out.The seismic robustness of the oil and gas pipeline cable-stayed pipe bridge structure was studied by carrying out seismic /non-seismic finite element simulation of the oil and gas pipeline cable-stayed pipe bridge model structure under seismic excitation and through comparative analysis of displacement response and acceleration response.The research results indicated that under different intensities of seismic excitation,using an MSMA-piezoelectric composite damping device can effectively reduce the seismic displacement response and acceleration response of the oil and gas pipeline cable-stayed bridge structure.The established MSMA-piezoelectric composite damping device model can effectively achieve numerical simulation of the vibration reduction of the oil and gas pipeline cable-stayed bridge structure.To provide a theoretical basis for further seismic design of cablestayed pipe bridge structures.