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| A study on seismic behavior of full height opening stiffened thin steel plate shear wall |
| FU Bo1，CHEN Yuan1，SHENG Kai2，SUN Hao1，TONG Genshu3 |
1.Hangzhou TongMSK Architectural Structure Design Office Co., Ltd., Hangzhou 311215, China;
2.Beihui Green Construction Group Co., Ltd., Heze 274000, China;
3.Institute of High-Performance Structures, Zhejiang University，Hangzhou 310058, China |
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Abstract A low-cycle reversed horizontal load experimental research was conducted on two full-scale specimens of rectangular concrete filled steel tubular frame with full height opening stiffened thin steel plate shear walls (SPSW) and one non-opening SPSW specimen. The influence of the presence or absence of openings, and the opening positions was considered during the design of specimens. The frame columns were subjected to axial compression. The horizontal load-vertex displacement hysteresis curve and skeleton curve of each specimen are obtained through the study. On this basis, the failure mode, bearing capacity, ductility, energy dissipation capacity, stiffness degradation, strength degradation and other performance indicators of specimens were analyzed. The test results show that the specimens have good ductile deformation ability when the frame columns are subjected to vertical pressure. The ultimate drift ratio of the specimens can reach 1/51~1/29. Different from the failure mode of the non-opening wall, the failure of the opening wall starts from the failure of the stiffener at the edge of the opening. The side opening specimen retains certain shear failure characteristics, and the failure mode is the bending shear failure mode. The failure mode of the specimen with the middle opening is the bending failure mode. When the size of the opening is the same, the performance of the side opening specimen is better than that of the middle opening specimen. Finally, it is suggested that in addition to meeting the stiffness requirements given in the current code, the bearing capacity of the edge stiffeners should be checked as vertical members. The steel plate shear wall with full height opening is modeled by shell element. At this time, only the shear bearing capacity of the wall should be checked, and the axial force of the surrounding vertical members should be multiplied by 1.10~1.15.
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Received: 21 April 2022
Published: 28 June 2023
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