Quasi-static test study on the residual seismic performance of aqueduct with double troughs structures
To evaluate the residual seismic performance of large-scale reinforced concrete aqueduct structures following a main earthquake,a 1/6 scale shaking table test was conducted using a prototype double aqueduct from the South-to-North Water Diversion Middle Route Project.Subsequently,static and pseudo-static tests were conducted on the aqueduct body and bracket components separately,investigating the failure modes and residual seismic capacities of each component.Additionally,a post-damage finite element model was established for comparative validation.The residual seismic performance of the aqueduct bracket structures was assessed using the capacity spectrum method.The research findings indicate that the post-main earthquake failure mode of the aqueduct body specimen slightly differs from previous studies.Despite the varying levels of damage observed in the bracket specimens during the main earthquake,the pseudo-static test demonstrated that parameters such as hysteresis behavior,ductility coefficient,load-carrying capacity reduction,lateral stiffness,and energy dissipation performance had only minor differences between the two damage levels.Additionally,the numerical simulation results closely match the experimental curves.Lastly,the assessment using the capacity spectrum method confirms that the aqueduct components still maintain a satisfactory residual seismic capacity.
aqueduct with double troughsaqueduct bracketdeteriorated structurequasi-static testingresidual seismic performance
NETL
NSTL
万方数据
