Equivalent damping ratio model of flexure-shear critical RC columns. (1st January 2017)

• Record Type: Journal Article
• Authors: Zhang, Yan-qing; Gong, Jin-xin; Zhang, Qin; Han, Shi
• Is Part Of: Engineering structures. Volume 130(2017:Jan. 01)
• Page Start: 52
• Page End: 66
• Publication Date: 2017-01-01
• Subjects: Reinforced concrete -- Flexure-shear critical column -- Hysteretic behavior -- Equivalent damping ratio -- Seismic design; 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.2016.10.003
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Hysteretic loop expression of flexural-shear critical RC columns under complete cyclic loading is developed. An equivalent damping ratio model suitable for flexural-shear critical RC columns is proposed. A design example of two-column pier supported bridge is provided to illustrate the application of the proposed model. Abstract: To describe the hysteretic behavior of flexure-shear critical reinforced concrete (RC) columns realistically, a hysteretic loop expression of flexure-shear critical RC columns under complete cyclic loading is proposed by investigating the characteristics of column specimens in PEER - Column Database. For the proposed expression, important characteristics of flexure-shear critical RC columns under cyclic loading, including pinching and stiffness degradation, are covered. And then, an equivalent damping ratio model suitable for flexure-shear critical RC columns is proposed by using the proposed hysteretic loop expression based on the Jacobsen's approach. The relationship between the equivalent damping ratio formula of two-column pier supported bridge and that of its columns is developed based on the energy dissipation capacity. A design example is provided to illustrate the application of the proposed model.