Estimating Fundamental Period of Corrugated Steel Plate Shear Walls
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2305-2
Structural Engineering
Estimating Fundamental Period of Corrugated Steel Plate Shear Walls Qiuhong Zhaoa,b, Jing Qiua, Yu Zhaoc, and Cheng Yud School of Civil Engineering, Tianjin University, Tianjin 300350, China Key Laboratory of Coast Civil Structure and Safety of Ministry of Education, Tianjin University, Tianjin 300072, China c China Railway Design Corporation Co., Ltd., Tianjin 300308, China d Dept. of Engineering Technology, University of North Texas, Denton, TX 76203, USA a
b
ARTICLE HISTORY
ABSTRACT
Received 13 December 2019 Revised 31 March 2020 Accepted 19 May 2020 Published Online 14 August 2020
Corrugated steel plate shear walls (CoSPSWs), which consist of corrugated infill steel wall panels and steel boundary frames, could be used as lateral force-resisting systems for mid- to high-rise buildings. In seismic design, the fundamental vibration period is generally estimated by empirical formulae corresponding to different types of lateral force-resisting systems. However, both the formulae in various design specifications and improved formulae proposed recently for steel shear walls with flat wall panels were not suitable and accurate for CoSPSWs since the difference in the load-carrying mechanism of steel shear walls with flat and corrugated wall panels respectively. Eigenvalue frequency analyses were conducted on a total of 60 validated CoSPSW finite element models with varying geometries, and results showed that fundamental periods estimated by current formulae were shorter than periods from the analyses, which might lead to the over-conservative and uneconomic design. Improved empirical formula was proposed for the fundamental period of CoSPSWs based on regression analyses. Simplified calculation method for calculating the fundamental period of CoSPSWs after the first trial design was proposed using the shear-flexure cantilever formulation, and validated through finite element analyses. Furthermore, influences of major geometric properties of CoSPSWs on the fundamental period was investigated.
KEYWORDS Corrugated steel plate shear walls Fundamental vibration period Empirical formula Regression analyses Simplified calculation method
1. Introduction Steel plate shear walls (SPSWs) were proposed in the 1980s as lateral force-resisting systems for mid-rise to high-rise steel buildings, with advantages such as high lateral strength, ductility and redundancy (Timler and Kulak, 1983; Driver, 1998; Lin et al., 2010; Asl and Safarkhani, 2017). SPSWs are composed of infill wall panels, usually flat, horizontal boundary elements (HBE) and vertical boundary elements (VBE), as shown in Fig. 1. Since the infill panel is generally slender, it tends to buckle under low level of lateral forces or gravity loads, and develops its ultimate lateral strength through yielding of the diagonal tension field, which results in relatively high anchoring forces on the boundary elements (Lubell et al., 2000). Corrugated steel plate
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