مقاومت برشی دیوارهای برشی موجدار فولاد سخت Shear resistance of stiffened steel corrugated shear walls

1. Introduction The lateral force resistant ability of high-rise building is very essential in its design. The lateral force resistance of common frame structures could be significantly improved by adopting steel plate shear walls (SPSWs), and this technique has been utilized in practical engineering structures worldwide. Yet, some disadvantages exist in the frame structures with SPSWs as follows: (1) Generally, out-of-plane bending rigidities of steel plates are quite small, especially for those with small thickness. Hence, when the SPSW is subjected to lateral forces induced by earthquake or wind effects, it easily buckles and its post-buckling strength would be produced through yielding of the diagonal tension field, leading to a loud noise. (2) For the structure with its frame and SPSWs installed simultaneously, the vertical loads transmitted from upper structures would be applied to the SPSWs, thus producing pre-compression and influencing the shear resistance of the SPSWs [1]. With those considerations, the infilled steel plates could commonly be replaced by steel corrugated plates, forming the steel corrugated shear walls (SCSWs). Numerous investigations were conducted by researchers to perform the comparison of the shear resistance and hysteretic behavior between SPSWs and SCSWs [2–6]. Berman et al. [2,3] performed the comparison of hysteretic performances among SPSWs, ordinary concentrically braced frames (OCBFs) and SCSWs, in which the corrugations were set in a diagonal direction with an inclination angle of about ° 45 . Emami et al. [4,5] conducted hysteretic tests of SPSWs and SCSWs, in which the corrugations installed horizontally and vertically were respectively considered. Kalai et al. [6] conducted FE analyses of SPSWs and SCSWs under cyclic shear loads to perform comparison, in which the effect of corrugation shapes on the hysteretic performances of SCSWs was investigated. According to these researches, by utilizing SCSWs in frame structures, the shear buckling loads could be significantly promoted owing to the increase of bending rigidities of the steel corrugated plates. In addition, based on the investigations performed by Tong and Guo [7], the vertical pre-compression loads could be efficiently released for the SCSWs with their corrugations laid horizontally. Due to these advantages of SCSWs, they have been widely used in practical building structures as lateral force resistance systems in recent years, as shown in Fig. 1. Current researches on SCSWs mainly focused on the shear resistance of SCSWs with small thickness (i.e. t = − 0.5 1.5mm), and numerous experimental and numerical investigations have been published [8–16]. The SCSWs with small thickness are easily to be profiled into trapezoidal corrugations. However, they are only suitable for the applications in low-rise buildings since the thickness of SCSWs inevitably limits their upper bound of shear resistance. In order for the applications of corrugated plates with small thickness in high-rise buildings, multiple corrugated plates would be required to improve the ultimate resistance. Otherwise, SCSWs with large thickness (i.e. t = −4 8mm) should be adopted in high-rise buildings, which benefited from both the improvements of the steel ductile properties and the equipment for cold rolling. Correspondingly, the shear resistant behavior of SCSWs with large thickness is worth of investigation for high-rise structural applications.