Study on axial compression behavior of self-compacting concrete short-leg shear wall with cross-shaped steel tube bundles
In order to study the axial compressive behavior of self-compacting concrete short-leg shear wall with cross-shaped steel tube bundles,the axial compressive behavior of self-compacting concrete short-leg shear walls with cross-shaped of steel tube bundles with different cavities was analyzed by model test and ABAQUS numerical simulation.Firstly,according to the results of axial compression test,the failure mode of shear wall and the axial load-strain curve under equal axial compression were analyzed,and the axial compression bearing capacity calculation formula was proposed.Secondly,the finite element calculation model of shear wall axial compression was established,and the test results were compared with the model calculation results to verify the accuracy of the finite element model.Finally,according to the results of finite element parameterization analysis,the calculation formula of axial compression bearing capacity of shear wall was verified and modified.The study reveals that shear walls exhibit similar characteristics in axial load-strain curves across different numbers of cavities,indicating good deformability.Throughout the failure process,the steel tube bundles significantly confine the core concrete,enhancing the specimens'ductility and load-bearing capacity.The failure of steel tubes is primarily characterized by multiple bulging and weld crackings,especially around the middle quarter of the steel bundles.Moreover,an increase in the number of cavities leads to improved ultimate load-bearing capacity of the shear walls,albeit with a reduction in ductility coefficient.The error between the simplified formula and the finite element analysis results is controlled within 10％.The formula can provide theoretical reference for engineering design applications.
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