The shape of the dark column section effect on prefabricated composite shear tip
In order to study the impact of dark columns in different section shapes on prefabricated composite shear,the impact of the seismic performance of the prefabricated composite shear tip,the L-shaped and 3 rectangular cross-section dark column node components are designed to conduct low weekly repeated tests.The seismic indicators such as failure phenomenon,hysteresis curve,skeleton curve,stiffness degradation,ductility,energy dissipation,strength attenuation and cumulative damage of each specimen are studied.The results show that the destruction mode of the two types of components is bending and destruction.The area surrounded by the hysteresis curve of the L-section dark column specimen is relatively full,and the energy consumption capacity is strong.Compared with the rectangular section dark column specimens,the positive and negative peak loads of the L-section dark column members are increased by 16.90％and 14.65％respectively.The stiffness degradation cruve is slow,and the overall bearing capacity and lateral stiffness performance are also superior.By comparing the cumulative injury indicators of the two types of components,it is found that the degree of damage of the L-shaped cross-section dark column test parts is low.The ductility coefficient of the L-section dark column specimen is larger than 3,which meets the seismic design requirements of the concrete structure.In short,the overall seismic resistance of the L-shaped cross-section dark column test parts is relatively good.It is suggested that it can be applied and promoted in actual engineering.
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万方数据
