Experimental study on axial compressive behavior of assembled composite shear wall

This paper investigates the axial compressive behavior of assembled composite wall (ACW) which consists of a double steel plate-concrete composite shear wall and two external concrete layers on both sides. 29 ACW specimens and 4 double steel plate-concrete composite shear wall (DSCW) specimens were tested under axial load. ACW demonstrates excellent axial compression performance, with its axial compressive strength and deformation abilities both being superior to DSCW. Test results indicate that: i) the ratio of shear connector spacing-to-plate thickness (s/t) s / t ) has a significant influence on the axial compressive strength, failure mode and local buckling load of the specimens; ii) the external concrete layers can delay the local buckling of the steel plates and enhance the axial compressive strength of the composite shear wall. The impact of the external concrete layers on the axial compressive behavior of ACW is related to their arrangement form. Finally, three different codes were evaluated, the results show that EC4 and GB/T 51340-2018 calculation results match well with the test results.