未加筋的低屈服点钢板剪力墙的结构性能英文文献和中文翻译
1。Introduction
Steel plate shear walls (SPSWs) have been frequently used in the United States, Japan, and Canada over the past three decades or so。 Considerable amount of theoretical and experimental research has been conducted in Canada, Iran, Japan, Taiwan, the United Kingdom, and the United States on their structural behavior and analytical model- ing as a lateral force-resisting system in design of low-, medium-, and high-rise buildings against seismic and wind loads。 The advantages of using SPSWs as the lateral force-resisting system in buildings include stable hysteretic characteristics, high plastic energy absorption capacity, and enhanced stiffness, strength, and ductility [18]。
SPSWs have been used with two different design philosophies as well as detailing strategies。 One approach employs heavily-stiffened SPSWs to ensure that the wall panel achieves its full plastic strength prior to out-of-plane buckling。 Thus, the stiffened wall panels can resist large lateral forces and dissipate earthquake-induced energy。 Such systems are current practice in Japan, where high-fabrication cost is
tolerated in order to guarantee high seismic and structural performance。 North American practice, on the other hand, is to use thin unstiffened steel wall plates, which exhibit nonlinear behavior at relatively small story drifts as they buckle out of plane [8]。 The elastic shear buckling of the thin plate in SPSW usually results in reduced stiffness, strength, and energy dissipation capacity。 Although the tension field action is able to provide the post-buckling strength, however if the shear buck- ling occurred in the early stage, out-of-plane permanent deformation may affect the serviceability of the thin-plate shear wall under small or moderate earthquake [6]。 Even though the infill plates can be either stiffened or unstiffened depending on the design philosophy, labor costs in North America indicate that unstiffened panels are preferable [11]。
Buckling stability, energy dissipation capacity, and serviceability of SPSW systems can be improved by either increasing the web-plate thickness or using horizontal and vertical stiffeners。 Nevertheless, this may not result in economical design of shear walls with conven- tional steel infill plates。 Application of low yield point (LYP) steel with extremely low yield stress and high elongation capacity, developed by the Nippon Steel Corporation in Japan [23], nowadays provides the possibility to design relatively economical SPSW systems with high structural and seismic performance。