New expression to estimate out-of-plane displacement of special concentrically-braced frames. (15th March 2017)

• Record Type: Journal Article
• Authors: Rezayibana, Bahram; Yahyai, Mahmood
• Is Part Of: Engineering structures. Volume 135(2017:Mar. 15)
• Page Start: 236
• Page End: 245
• Publication Date: 2017-03-15
• Subjects: Out-of-plane displacement -- Slenderness ratio -- Special concentrically braced frame -- Inertia effect -- Storey drift ratio; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2017.01.003
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: We model 16 special concentrically braced frames (SCBF) to determine seismic response. We obtain out-of-plane displacement response of SCBF under static and dynamic loading. A new expression is proposed to determine out-of-plane displacement of SCBF. Out-of-plane displacement is determined in terms of the storey drift ratio and the slenderness ratio. Abstract: Induced non-structural damages due to strong ground motion can affect the performance levels of a building. Special concentrically-braced frames are used in high and moderate seismicity regions because of high ductility and energy absorption capacity. In special concentrically-braced frames, storey drift ratio and the out-of-plane displacement are the most important parameters defining structural and non-structural damage. Various expressions for out-of-plane displacement without inertial effects are available in the literature. This study describes the development of new expressions to determine out-of-plane displacement for special concentrically-braced frames based on the seismic response of 16 different single-storey models: eight inverted-V and eight X-braced frames. Initially, out-of-plane displacement is calculated based on cyclic loading and then modified for earthquake excitations. A simplified iterative procedure is proposed to calibrate out-of-plane displacement expression using revised effective mass. Two new expressions for determining out-of-plane displacement are developed as a function of storey drift ratio, slenderness ratio, and the ratio of the tension to compression strength.