Strength reduction factor of self-centering structures under near-fault pulse-like ground motions

Dong, Huihui; Han, Qiang; Du, Xiuli; Qiu, Canxing

doi:10.1177/1369433220945055

Cited by 7 publications

(2 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proposed dynamic theoretical model can evaluate the seismic performance of the SC pier system more easily, accurately, and comprehensively. In addition, some studies 37,38 have indicated that, under near-fault earthquake ground motions, much larger seismic responses of SC systems would occur because of high-energy pulse action. This could significantly amplify the impact effect on the rocking interface.…”

Section: Influence Of the Impact Force On The Rocking Interfacementioning

confidence: 99%

See 1 more Smart Citation

Theoretical investigation on the impact effect in dynamic analysis of self‐centering pier system based on the Hertz contact‐pounding model

Zhang

et al. 2023

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

The self‐centering (SC) pier system exhibits different mechanical behaviors under an earthquake compared with that in quasi‐static experiments, especially the impact effect on the rocking interface. Published theoretical analysis and experiments had indicated that the impact events significantly affected the rocking motion, including extra energy dissipation, greater contact stress, and even more serious damage. To describe the impact mechanism more clearly and obtain the impact responses more directly, this study investigates a dynamic theoretical model considering the impact effect and its influences on the seismic responses and rocking interface. First, a dynamic theoretical model based on the Hertz contact‐pounding model specific to the SC pier system is proposed, and the impact mechanism is described in detail. Subsequently, dynamic motion equations considering the impact effect are derived. The key parameters of the contact‐pounding element (stiffness KHertz and damping CHertz) that significantly affect the impact process are presented. The accuracy of the proposed theoretical model is verified by test data and a finite element model (FEM). Finally, the influences of the key parameters (KHertz and CHertz) on the impact force are analyzed, and the impact effect on the rocking interface is investigated. The results indicate that the impact effect significantly increases the vertical acceleration and contact stress, particularly under near‐fault earthquakes. This may cause unexpected damage on the rocking interface and should be an important consideration in the optimize design of SC pier system.

show abstract

Section: Influence Of the Impact Force On The Rocking Interfacementioning

confidence: 99%

“…In addition, some studies 37,38 have indicated that, under near‐fault earthquake ground motions, much larger seismic responses of SC systems would occur because of high‐energy pulse action. This could significantly amplify the impact effect on the rocking interface.…”

Section: Influence Of the Impact Effect On The Seismic Responsementioning

confidence: 99%