Seismic Performance of Strain-Hardening Cement Composite (SHCC) Squat Shear Walls with vertical slits

This study investigates experimentally the applicability of selectively weakening retrofit for existing and non-ductile squat shear walls. To evaluate the effect of vertical seams on the wall panel on the hysteretic behavior and failure mode of Strain-Hardening Cement Composite (SHCC) squat shear walls, two 1/3 scale shear walls with vertical seams as a variable were made and tested under reversed cyclic loadings. All specimens had same rectangular cross-section 1,100mm¡¿50mm, with panel height 600mm. The vertical seam is 40mm wide and 260mm high and 460 high. SHCC for wall specimens was supplied by a local ready mix company with specified strength of 50MPa. The test results of this study; length of the slit is increased in squat shear wall, which the specimen became load-carrying capacity and stiffness. But have vertical silt, the squat shear wall shows aspects of ductility destruction.

Vertical Seam Effect on Seismic Performance of Reinforced Concrete Squat Shear Walls with Rectangular Cross-Section

In this study, two reinforced concrete (RC) squat shear walls with height-to-length ratio of 0.55 and non-ductile reinforcement details are tested under reversed cyclic loading. Emphasis of the study is placed on the hysteretic behavior and cracking procedure of RC squat shear walls in accordance with the presence and absence of vertical seam on the wall panel. Two specimens had the same rectangular cross-section of 1,100 x 50mm, with wall panel heights of 600mm. To investigate the effect of vertical seams on the wall panel on the structural behavior of shear wall, one wall (CON-S) with three vertical seams with dimension of 260 x 40mm was made and the other (CON-N) was a solid wall without seams. The test results indicated that a squat shear wall with vertical seams exhibited more stable hysteretic behavior than a solid shear wall. Vertical seams on the wall panel improve the ductility and energy dissipation capacity but decrease the maximum strength of RC non-ductile squat shear wall.