Seismic Performance of Hollow Precast Concrete Columns used in the Metro Overhauling Depot
To study seismic performance of the hollow precast concrete column used in the metro overhauling depot,three specimens including a hollow precast concrete column,a solid precast concrete column and a hollow cast-in-situ concrete column were constructed and investigated through pseudo-static test and finite element simulation.The results show that the failure modes of the specimens are all flexure-shear type.In addition,the bearing capacity and degradation performance are similar,and the deformation ability is good.However,the energy dissipation capacity and ductility of the hollow precast specimen is relatively poorer.For the hollow precast concrete column,the section can be simplified into an I-shaped one to compute the bearing capacity using the formulas in the code.Compared with the solid precast concrete column,the hollow one has a great advantage of saving materials while emulating the cast-in-situ one.As the axial compressive ratio increases,the bearing capacity of the hollow precast concrete column rises first and then drops while the energy dissipation capacity decreases.
NETL
NSTL
万方数据
