Seismic performance of concrete-filled double corrugated-steel-plate shear wall with T-section

In this paper, the hysteretic behavior of the concrete-filled double corrugated-steel-plate shear walls with Tsection (T-CDCSW) under low cyclic loading were investigated experimentally. The effects of axial compression ratio, corrugation shape, corrugation direction, flange size, and setting the concrete-filled steel tube (CFST) side column on the T-CDCSW's hysteretic performance were studied from the aspects of hysteresis curve and failure mode. The findings demonstrate that the T-CDCSWs exhibit good seismic performance under the test parameters in this paper. T-CDCSW specimens still had a certain post-yield bearing distortion capacity, with the maximum drift ratio of 3.2%. The stress characteristic of T-CDCSW was that the stress level at both ends of the specimen was higher than that in the middle. Therefore, setting the CFST side columns is a critical factor in enhancing the seismic behavior of T-CDCSW. The vertically-narrowly corrugated-steel-plate could better constrain the inner concrete, and the cooperative working performance was better under low cyclic loading, while the horizontally-narrowly corrugated-steel-plate showed the most severe degradation in strength. The corrugation direction design is suggested to be set up vertically. Based on the simplified stress model, the formula for calculating the horizontal bearing capacity of T-CDCSW was derived. According to the findings of this paper, it can be seen that it is feasible to promote the application of T-CDCSW in the architecture of high-rise buildings.